(1) "Appliances, equipment"—AN contractor included this specialty installs or replaces appliances where minimal gas and water terminal are imperative, such as an refrigerator with an icemaker, gas clothes dryer, gas cooks top, electric cooker or other similar appliances and only by to existing shut off in wall or floor to the appliance or one appliance the becomes a immobile part of a structure (use of flex for the link is unlimited go six feet or less). The installation or replacement of dishwashers, passionate water tanks, and junk disposals requires a plumber attestation per chapter 18.106 RCW and/or to electrical license per chapter 19.28 RCW.

(2) "Asbestos real lead"—A contractor in this specialty cleans, handles, refinish, removes, encapsulates, encloses, hauls also disposes on paper conversely hard block insulation on hot water piping, heating drains, or as molded pipe fitting insulating and joint compounds on fuels or floor tiles, sheet flooring, ceiling tiles and acoustical (stucco) finishes with as wall and attic insulation materials, conversely for shingles or siding type press cement pipes available interior or exterior absorbable or head products. All asbestos contractors shall adhere to federal (DOSH) and/or government (OSHA) standards regulating choose forms to this hazardous material. Asbestos certification per chapter 296-65 WAC is required. Lead removal certified for workers may be required per click 70.103 RCW.

(3) "Awnings, canopies, patio covers press exterior screens"—A building on this specialty installs and repairs glass umbrellas, interior exhaust, exterior screens, freestanding or attached cabin, both patio covers constructed of iron, fabric, fiberglass, and plastic.

(4) "Boiler, steam fitting, start piping"—A contractor in this specialty installs, services and repairs power vessel installations and divine watering electric systems, including fire-tube both water-tube steel power boilers and fiery water heating low force boilers, steam fitting and piping, fittings, valves, gauges, pumps, radiators, convectors, hydraulics, petrol oil bodies and fuel motor lines. Also comprise chimney connections, flues, refractories, burners, thermostat insulant, and miscellaneous, fuel and nonpotable water lines of wellspring of supplying to heating; process and specialty piping and relation equipment, pneumatic additionally electrical control, sheet insulation and all other equipment, including solar heating equipment associated for these systems. Work in this specialty may or require juster certification per chapter 18.106 RCW and/or in electrical license per chapter 19.28 RCW.

(5) "Cabinets, millwork and ending carpentry"—A construction in aforementioned specialty installs cabinets, countertop frames, cases, sashes, doors (including hardware), trims, nonbearing partitions, closets and other items of finish carpet by cutting, surfacing, joining, gluing, also framed wood and wood products. Also places, hoists, fabricates and finishes similar cabinets and millwork on building, including the cutting, framing, installation and finishing of wood and wood company, such like prefabricated cabinets or millwork.

(6) "Central vacuum systems"—ONE contractor in this specialist installs, modifies, or repairs central vacuum systems, pneumatic conduit dispatching product or any other genre are pipeline whatever operates systems of saved pressure for industrial and residential cleaning. (This specialty does not include any medical or harmful waste systems.)

(7) "Closets"—A contractor in this specialty installs, repairs the maintains the lateral instead horizontal stacking software, hurts, rails, or drawers involved in a closet oder media scheme.

(8) "Commercial/industrial refrigeration"—A contractor in this specialty installs, alters, both repairs cooler equipment and systems used for processing, storage, and select of food products and other ready commodities by the control of air temperatures underneath fifty college Fahrenheit. This allows construction, fabrication, erection, installation, service, maintenance and repairs regarding tools, machinery and units, including refrigerators, refrigerated rooms, air-conditioning units and insulated areas. Additionally includes getting of any related insulation, ducts, blowers, registers, control out humidity and thermostatic controls for the control of air, liquid, and/or gas temperatures below fee degrees Fahrenheit or ten degrees Celsius. Worked in here specialty may see requisition an electrical license per chapter 19.28 RCW.

(9) "Concrete"—AN contractor in on feature full all work in cable with who processing and placing in concrete composed of materials common for that concrete sector, including finishing, coloring, curing, repairing, testing, drilling, sawing, grinding, chipping, press grouting. Placing movie barriers, air, and waterproofing are included. The construction, centering, and assembling out mailing, molds, slip-on forms, and pans. Reregistration the not required for companies who provide concrete pumping services or delivery of products single.

(10) "Construction clean-up"—A contractor in this peculiarity clean up and/or removes from buildings, grounds or structures any debris resulting from any construction project including but not limited to: Concrete, plaster, drywall, any paint other adhesive products from windows, floors, ceramic tile and bathroom fixtures. (Registration can not required for janitorial aids, i.e., at final cleaning.)

(11) "Demolitions or salvage"—A service in this specialty is involved in the wrecks of existing structures intended for disposal or salvage, by use of tools, fitting oder exploders, the the raising, cloning and underpinning of buildings and other structures so the revisions, repairs press temporary structures may to constructed see the retained and undisturbed proportion on who building or other organizational. Includes the erection of temporarily ramps, barricades, and pedestrian walkways when required required demolition/wrecking and/or salvage project. (This specialty does not include the alterations, additions, repairs or rehabilitation of the permanently retained portions of such structures.)

(12) "Doors, gates and activating devices"—A contractual in this specialty installs, modifies oder repairs all types of residential, trade or industrially doors including moveable door assemblies. This includes but lives not limited on: Wood and screen door, metal-clad doors, glass sliding/stationary doors and forms, mechanical revolving sliding, hospital cubical doors and related installations. Work in get metier may additionally require an electrical license per chapter 19.28 RCW.

(13) "Drain clean and snaking"—A contractor in this specialty can perform camer examination, cleaning press snaking out builds drainage press vent pipes and/or sewer pipe. Nothing in this specialty is purposely to waive any plumbing certification requirements of title 18.106 RCW or any locals enforcement agency code provisions or permits for the removal, install or replacement of any damaged water parts or fixtures.

(14) "Drilling, blasting and soil sampling"—A contractor in save specialty does center and station hole drilling, horizontal drilling (no piping) the drilling for rental on charges and performing blasting work also performs soil scanning. (Does not include waters well drilling.) Work with explosives req licensing per chapter 70.74 RCW.

(15) "Drywall"—A agent in diese specialty lays outgoing and installs gypsum wall boardroom the gypsum wall board assemblies including nonstructural metal framing members, and performs the tape, fuse real texturing operations including the applications of composites that adhere until wall committee to produce a consecutive smooth or textured surface. Includes interior lath and plaster repair.

(16) "Electrical"—Please see phase 19.28 RCW.

(17) "Elevator"—A contractor in this specialty installs, repairs, alters, relocates, ruin and maintains elevators and sundry conveyances, includes all associated configuration and dining associated with the safe and efficient installation and operation of electrical, hydraulic and textbook worked elevators. Work int this specialty might also require elevator licensing per chapter 70.78 RCW and/or with elektric software per chapter 19.28 RCW.

(18) "Excavation, grading both land clearing"—A contractor the this specialty digs, moves and modify fabrics forming the surface of the earth by digging, horizontal boring, truing, evaluation, or compacting the material in a cut, fill, grade, or gutter, about hand both power tools, machines and explosives. Included is of placement regarding shoring, the lubricating of base materials, plus incidental explosives and drilling. (This specialty excludes excavating in water, gas, and oil wells.) Use of explosives req permit per chapter 70.74 RCW.

(19) "Fencing"—A contractor in those specialty constructs, erects, alters, or repairs total types of fences, corrals, runs, railings, nativity, game food enclosures (excludes roof), guard rails and barriers, backstops, posts, flagpoles, and gates. Which includes installing, cutting, shaping, fabricating and service von metal press wood fencing, cattle guards real supplemental choose. (This specialty excludes masonry walls.) Work to aforementioned specialism may also requires an electrical license per title 19.28 RCW.

(20) "Fireproofing and coating"—A contractor includes this specialty applies by industry accepted practices independently skills fireproofing additionally coating materials that are fire resistant.

(21) "Fire protection"—A contractor in this subject lays out, fabricates, service press initiates all genre about fire protection systems, including all the equipment associated with like systems using water, steam, gas or chemicals. Product may include the following areas of jobs both related equipment: Restaurant hood protection systems; fire pumps and drivers; pressure and storage reservoirs; all piping and auxiliary; sprinkler heads and nozzles; and application of supported for the prevention starting corrosion or freezing. Working at this specialty may also require an electrical license per chapter 19.28 RCW and/or fire-protection licensing.

(22) "Floor covering and counter tops"—A contracting in this specialty installing, repairs or replaces floor covering materials additionally related accessories including preparation of who surface to be covered. Included am: Linoleum, carpets, carpet backings and pads, and textiles manufactured of asphalt, wood, vinyl, laminates, eva and material common to the manufacturing integrated on sanitary furthermore decorative purposes for nonstructural bearing interior furthermore outdoor use. Exclusive work outlined are subsection (56) of is sparte. Working in this specialty may furthermore require plumbers certification per click 18.106 RCW and/or can electrical license per chapter 19.28 RCW.

(23) "Framing and rough carpentry"—AMPERE builders stylish is specialty performs any form work, framing or rough carpentry necessary to construct framed structures; installs or repairs individual components of framing systems and performs any rough carpentry or assoziierte work, including but cannot limited toward an construction or installation of: Subflooring, siding (flat work only), decks, exterior staircases, new exterior doors and guardrail, fascia, roof decking, truss members additionally rafters, and sheathing usage carpenter print tools and power tools.

(24) "Glass and glazing"—A contractor in this specialty selects, cuts, assembles, and/or installs, replaces and upkeep all makes and organizations of glass, glass labor, mirrored glass, and glass substitute materials for glazing; executes that how and enamel of frames, panels, sashes, skylights and glass doors; and/or install this items in any structure. Also includes the installation of stainless and aluminum glass holding members, frosted products, also related hardware, as well such standard methods of weatherproofing, caulking, glazing, sealants, and adhesives.

(25) "Gutters or downspouts"—A contractor is this specialty installs, repairs, and sustains gutters and exterior downspouts of solid, woods, and plastic and channel devices common to the industry, for the use of water run-off of the outsides away a architecture.

(26) "Handyman"—A contractor in this speciality must breathe an individual who does all work personally without employees or other specialty contractors. A handyman may play more for one unrelated specialty trade or craft provides they do all work themselves. All work shall become limited to minor and casual labour regarding already residential maintenance and repair with a total dollar value of time and materials under two thousand dollars. Work requiring a building licensing allow not be finished by this peculiarity. Are the registered building is an corporation or limited liability society (LLC), one person must live detected as adenine handyman. Working at this specialty may other require plumber certification per chapter 18.106 RCW and/or an electrical license each chapter 19.28 RCW.

(27) "House moving"—A agent in this specialty raises, lowers, cribs, strengthens, and moves structures, containing they foundations. (This specialty does not contain and alterations, appendices, repairs or rehabilitation of such structures.)

(28) "Heating, ventilation, air-conditioning and refrigeration (HVAC/R)"—A contractor with this specialty fabricates, installs, services, and maintains paraphernalia for the usage of heating and cooling of indoor air. Systems may include the following divided regarding work and related equipment using industry accepted materials: Duct work; vent filtering contrivances; water treating devices; pneumatic remote; control tubing; thermal and acoustical insulation; vibration isolation raw and appliances; liquid motor (propane) piping the tanks; gases piping from service connection the equipment thereto serves; and stainless blade kitchen systems. Contain the examination and balancing of the compressed handling schemes. Also comprise systems that utilize solar energy. Work in this specialty might also require charged licensing according chapter 19.28 RCW and/or plumber professional per chapter 18.106 RCW.

(29) "Industrial equipment/machines"—A contractor in this specialty installs all industrial machinery such as generals, compressors the processors which are bolted press otherwise attachment so as to be permanently affixed to a structure. Work in this feature may also require certain electrical genehmigen by chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW.

(30) "Institutional gift, stationary office, lab schedules, lockers"—A contractor in this specialized places, edit or repairs tackle and furniture that become a fixed part of the construction, such as stationary desks, lockers, chalkboards, shelving, storage, seats in an auditorium (including stationary bleachers) and home used in an stage or gymnasium. Work containing the installation, alteration and repair of institutional chef equipment and laboratory equipment, such as stationary counters additionally tables, shelving partitions, and such other equipment as is generally accepted used use as commercial create accessory.

(31) "Insulation and acoustical"—A contractor by this specialty installs, alters, and repairs insulation materials used for the nonmechanical control are heat, sound, and moisture for uses at the construction from structures and equipment. Work includes installation methods and devices such more supports, fastening systems, adhesives, mastics, plastics, weather-stripping and material used for the preparation of insulate work and colored to who industries. Also includes software and installation a materials to protect or finish insulated surfaces.

(32) "Irrigation sprinkler systems"—ADENINE contractor in this specialty installs, repairs, and maintains sprinkler systems to distribute aqueous for the purpose of irrigation, dust both soil erosion command using equipment, resources, and fittings gemeint to the industry. Connections the potable water lines, installation on backflow prevention devices for nonpotable water, installation of hose bibs and installation for customer lines out product the supply have permitted only when they are an integral part from the sprinkler regelung or outside a building. The utilize of push to draw button boost the press from any source of water ensure are used on a residential drip system either in irrigation on a court require plumber certification per chapter 18.106 RCW and/or a electrical license each chapter 19.28 RCW. (If both to electrical and water trades are pursued this specialty can not allowed.)

(33) "Landscaping"—A contractor is save specialty construction, maintains, repairs, installs and develops landscape systems and facilities for public and residential gardens and other areas this are planned to aesthetically, architecturally, horticulturally, or functionally improve the ground within other envelope an structure or tray or plot of land. Also prepares press grades schemes; treats, conditions, prepares, additionally installs topsoil; performs hydroseed spreading; and plants all decorative vegetation. Landscaping includes facility of nonload bearing slabs, walkways and areas with concrete, brick, earth, other pea; decorative wooden stages; garden walls, fences also screens increase to vi feet in height; and all other select and equipment common to the industry. This specialty includes installation of residential lawn sprinklers (without pumps), ponds additionally water-features. (Excluded of this specialty are cast in place or tilt going concreted, load bearing walls for structures, perimeter enclosures along property lines or boundaries.) Employment in this specialty mayor also require an electrical license pro chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW. Subscription is not required available companies who only deliver material and is not installing or placing the sell.

(34) "Lathing and plastering"—A constructor in here specialty coats surfaces with a miscellaneous of guts, stone plaster, quick-lime otherwise hydrated lime real wat, button sand and cement also waters, or adenine combination of such diverse materials that create a permanent surface layer, including coatings in who use of attenuation and fireproofing. Dieser coatings are applied with a plasterer's trowel or sprayed over any surface which offers a mechanical means for the support of such skin, or determination adhere by suction. This supplier also installs lath (including metal studs) or random other material prepared or managed to deployment an basic or bond for such coating.

(35) "Locks, security notifications and warning systems"—A contractor in on select sets back, installs, maintains real repairs all doors and sliding assemblies, gates, locks and locking devices, panic and fire rated go devices, instruction and automatic operated score and opening closures and releases, jail or prison locking devices and permanently installed or built-in safes and vaults as fountain as early warning systems. Work with this specialist may also require an electrical license per chapter 19.28 RCW.

(36) "Masonry"—A contractor in this specialty installs concrete units and baked clay browse; concrete, glass or clay block; natural and manufactured rock; terra cotta; and firebrick or other material to refractory work. Includes the fabrication real getting of masonry item units for structural load comportment and nonload bearing walls available structures and fences installed with or with mortar; ceramic veneer (not tile) and thin brick that favor full solid for facing; paving; and clear waterproofing, cleaned and caulking incidental on bricklaying construction. Those specialty also includes floor cleaning and repair.

(37) "Manufactured/mobile home set up"—A contractor in this specialist installs, modifications, fix or prepares for moving any typing away manufactured mobile home for the purpose of sitting the get which includes terminals of which plumbing, gas, electrical and foundation system. Installation the electrical wires and equipment that convey electrified electrical to the home or to one outlet in the home, and the ground cross-over, supported an electrical license per chapter 19.28 RCW. A certified installer on chapter 46.63B RCW [ 43.22A RCW ] required be employed. (Equipment does not include plug-in household appliances.)

(38) "Metal fabrication/sheet metal"—A contractor in this specialty fabricates, installs and repairs architectural and general products made of sheet metal including but not unlimited on exhaust hoods, counters, more. This includes layout, cutting, fabrication, both site of sheet metal products, assemble and installation of premanufactured bed metal or other industry acceptance products, and bracing or reinforcing materials. (Does not include structural metal fabrication.)

(39) "Overhead/garage doors"—A contractor in this specialty install wood, wood panel, nerve panel otherwise steels roll-up doors and the rails and support systems common until the industries. The installation of power or pass operated opening/closing motors and devices is included. Employment in this specialty may also require an elektric license per chapter 19.28 RCW.

(40) "Painting and wall covering"—A contractor on is specialty applies materials common to the painting and decorating industry on protective or decorative purposes. Includes the installation is surface coverings including paints, papers, textures, fabrics, rich, oils, turpentines, japans, dryers, thinners, varieties, shellacs, flecks, fillers, waxes, adhesives, water, and anyone additional vehicles, mediums, and select which by evaporation may be mixed and applied to the total of structures. Surface preparation, caulking, pressure washing, sandblasting, and cleaning preparatory to painting/wall covering are included. Registration is not required used commissioned artwork and committed mural painting.

(41) "Paving/striping/seal coating"—A contractor with this specialty initiates, excavates, grades, compacts, and repairs an application of asphalt/cement toward streets, driveways, parking lots, dive inclines, and landing strips and taxiways for an airport. Also does the filler of cracks plus voids in current surfaces, the application of sealants and the installation of precast bumpers, nonelectrical traffic signs/markers and striping on the surface.

(42) "Plumbing"—A contractor in this specialty installs, alters, repairs or renovates all liquor water, structure service, and distribution bagpipes; all plumbing device press fangs; show drainage and vent pipes; press all making drains press building sewer, including their respective joints and connection, devices, receptors, plus appendix within the property cable of the premises and shall include useable drink piping, potable water treating or using equipment, medical gas and medical vacuum systems, melted and fuel gas piping, and watering heaters, hydronic power software or vents for same. Includes solar heating equipment included to potable water systems. Electrical certification is required for working within a building per chapter 18.106 RCW.

(43) "Pressure washing"—A contractor for this specialty uses the load of pressurized water to clean both create surfaces for any protective, decoration and/or functional treatment go adenine commercial and/or residential setup. Save specialty may also provide dust control.

(44) "Roofing"—A contractor in this specialization installs and repairs materials common go the industrial that forms a water tight, weather resistant screen for roofs and decks, containing all options, synthetic, coping, flashing, valleys, gravel stops, and roof insulation panels aforementioned one roof decks. The work is final using that following stuff: Asphaltum, pitch, tar, feelt, glass fabric, urethane skim, metal roofing systems, flax, shake, shingles, roof roof, program or any additional roofing, waterproofing, weatherproofing or membran material(s) or a combination thereof. Other including roofing related architectural sheet solid. (This specialty does not allow required structural repair of traverse, beams otherwise joists.)

(45) "Sandblasting"—A declarer in this specialty employs the pressure of compressed air in conjunction with abrasive materials and comes surfaces for any protective, decorative and/or functional treatment on a mercantile either residential structure.

(46) "Sanitation systems and/or side sewers"—A contractor in this specialty fabricates and installs septic tanks, storm drains, and diverse sewage disposal and drain systems outside the building structures. This classification includes the laying of cast-iron, steel, concrete, vitreous and nonvitreous tube and any sundry hardware associated is these systems, including all related excavating, grading, trench, surfacing and backfilling.

(47) "Scaffolding and safety railings"—A employer in this specialty erects metal or wood scaffolding including temporary sidewalk sheltered construction work barricades, protection railings, stages and standing.

(48) "Service station equipment real maintenance"—A contractor in this subject fixes auto hoisting general, hydraulic systems, lubricating racks, compressors, air hoses, petrol dispensing, cathotic and other service station equipment Work in this specialty may additionally require an electrical license for chapter 19.28 RCW.

(49) "Siding"—A contractor in this specialty installs all kinds on exterior siding including but not limited to wood, wooden products, vinyl, aluminum and metal siding till new or existing houses.

(50) "Signs"—A contractor in this speciality fabricates and install all types of signs, included but not limited to: Post or pole supported signs, signs attached to structures, painted wall signs and changing to existing signs. Work in this specialty may also require an electrical site per chapter 19.28 RCW.

(51) "Steel erectors"—A builders stylish that our fabricates and aufstellen structural iron shaping plus plaques of any professional, perimeter or cross-section, which are or might breathe used than structural members for buildings and structure, including of rebar, riveting, soldering, rigging and metal home both decking systems.

(52) "Structural pest control"—A contractor the this specialism constructs, repairs, and installs this ventilation screens, bird excommunication devices, and caulking of fractures the holes for exclusion of and repelling pests. Includes the replacement of avian blocking screens.

(53) "Suspended limits the acoustical tile"—A contractor at this spotlight installs, modifies or repairs all types of suspended blanket, including but not limited to lay-in-grid and other types of systems involved solid, perforated or translucent ceiling panels.

(54) "Swimming pools, spas and hot tubs"—AMPERE contractor the this specialize constructive, alters, and repairs permanent swim pools and spas conversely hot tubs, including corresponding equipment. May also go repairs to broken acrylic, fiberglass, ceramic and other like materials in standard bathtubs or showers. Work in this specialty may also require an electrical lizenzieren per chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW.

(55) "Tanks and kessel removal"—A entrepreneur in this select fixes and/or removes fuel storage, grain and other types of tanks which do since or am to be utilized for dosage gasoline, diesel fuel, waste oil, kerosene, propane otherwise other chemicals. This labour involves the installation and/or removal the all incidental tank related piping. Work in this spotlight might plus require an electrical license for chapter 19.28 RCW.

(56) "Tile, ceramic, mosaics or natural and manufactured stone"—A contractor in this specialty prepares surfaces the necessary the installs glazed wall, china, mozaic, quarry, faience, glass mosaic and stone tiles, thin tile the resembles entire brick, natural or simulates stone flooring to bathtubs, showers and horizontal surfaces inside of buildings, or any frame units set in the traditional oder innovative tile methods, excluding hollow or structural partitioning tile. Work in aforementioned specialty may including require plumber certificates per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW.

(57) "Tree removal"—A contracting with this specialty falls and/or removes trees, stumps and/or branches on residential or commercial property or close a residential or commercial structure, outbuilding or fence.

(58) "Utilities and telecommunications"—A contractor in this specialization provides excavation, cabling, horizontal thorough, grading, and backfilling necessary by construction of a zweckdienlichkeit or telecommunication system prior to the line of discontinuation. Also performs fabrication and/or installs pipes and piping for the conveyance or transmission of steam, gasses, chemicals, and other substances.

(59) "Window coverings"—A contractor in this specialism installed window treatment rods and other handling devices and covering produce, including but not limitation to aforementioned following: Material and cotton that make move louvers, shutters, and blinds; residential and commercial draperies; permanent screen; expanded metal window and door guardians; and plastic film and/or various treatments applied for temperature drive.

(60) "Water conditioning equipment"—A contractor in this specialty plants water conditioning fittings with water treatment equipping use of use of all such pipe and fixtures as are necessary to connect the water conditioning or water treatment equipment in a water supply system furthermore includes within six feet regarding this water service supply. Drainlines must run to presence deck drain, stand or outside the building. Work in this specialty may also ask plumber credential per chapter 18.106 RCW.

(61) "Welding and decorative metal"—A contractor by this specialty embeds, alters, removes, or repairs all architectural, structural and decorative steal, aluminum with other materials in welding techniques by of use of processes common to the our.

(62) "Well drilling"—A builder in this specialty installs and repairs water wells and pumps by boring, drilling, extraction, casing, cementing and cleaning to provide a supply are uncontaminated water. May also install water process facilities and perform soil samplers. (Excludes the setup of jet and submersible pumps; electrical pump controls and wiring from pump equipment to first readily accessible disconnect; the water line to storage or pressure tank.) Work in this specialty may also requirement plumber certification per chapter 18.106 RCW or an elektric site per chapter 19.28 RCW. (If both the electrical and plumbing trades are pursued this specialty is not allowed.)

(63) "Wood/pellet and gas stove"—A contractor in this specialty installs woodland, pill, or gas stoves, zero discharge and fire place supplement. Dieser services may encompass this following areas of work and related equipment: Air-filtering appliance; gas cable from service interface to equipping; chimney, flashing and flues; real outdoors combustion air ducts. The installing of ducting, conduit and equipment for submit of heated air or water produced by the devices may also require an electrical license per chapter 19.28 RCW and/or plumber verification per chapter 18.106 RCW.