King County
Plumber in Duvall, WA
Duvall is one of the youngest towns we serve: the Census median year built is 2000, with 49% of homes built in 2000 or later, 47% from 1980 to 1999 and just 4% before 1980.
Key facts
- Serving
- Duvall, WA
- ZIP codes
- 98019
- From our shop
- About 12 driving miles from Monroe
- Water
- City of Duvall (all water purchased from Seattle Public Utilities). Very soft: about 1.48 grains per gallon (roughly 25 mg/L) in the city's 2023 water quality report
- Estimates
- Free, upfront flat-rate pricing
- Emergencies
- 24/7 at (425) 845-3535
Plumbing in Duvall
Duvall sits on SR 203 halfway between Monroe and Carnation, and the surrounding Snoqualmie Valley floods from late fall to early spring. In the December 2025 flood, SR 203 closed north of town and the NE 124th Street bridge over the Snoqualmie closed, though Duvall itself sits high enough that no evacuation was needed.
The city buys all of its water from Seattle Public Utilities, normally from the Tolt River watershed. Its 2023 report calls the water very soft, about 1.48 grains per gallon (roughly 25 mg/L), delivered to about 8,128 customers through 3,168 connections and 43 miles of main. The city has reported no known lead service lines, though a small number of homes and buildings may have lead connections.
Near McCormick Park, Snoqualmie Valley Trail, Snoqualmie River, and everywhere in between.
Local know-how
What's hard on plumbing in Duvall.
Check pre-2000 supply pipe
About 47% of Duvall homes were built from 1980 to 1999, and the town grew 50% from 1990 to 1997, right in the polybutylene era (roughly 1978 to 1995). Gray plastic supply lines should be inspected; we repipe in PEX or copper.
Pink sink stains aren't the water
Duvall's water report says pink or black stains around sinks and drains are airborne yeast, mold or bacteria that thrive in damp spots, especially in humid summers, not something in the water. Regular cleaning removes them; for slow or smelly drains, we clear the line.
Plan for flood-season road closures
When the Snoqualmie floods, SR 203 and the NE 124th Street bridge can close, as they did in December 2025. Know where your main water shutoff is, and call early if a water heater or pipe is failing so we can plan a route in.
Water running right now?
Shut off the main water valve, turn off the water heater, and call us. Our emergency line answers 24/7.
Services
Our services in Duvall.
- 01Plumbing
Drain cleaning in Duvall
Slow sinks, backed-up showers and main-line clogs cleared with professional cable machines and hydro-jetting, with a camera inspection when we need to see what's causing it.
- — Kitchen, bathroom, laundry and floor drains cleared
- — Main sewer line cleaning from the cleanout
- — Hydro-jetting to scour grease, scale and roots off the pipe walls
Typical price: $250–$550 for a standard drain cleaning
Learn more - 02Plumbing
Water heaters in Duvall
Tank and tankless, gas and electric: same-day repairs, code-compliant replacements and upgrades, with the unit sized to your household.
- — Diagnosis and repair of thermostats, elements, gas valves, igniters and leaks
- — Tank water heater replacement, same day when possible
- — Tankless water heater installation and upgrades
Typical price: $2,200–$4,000 for a replacement, depending on the unit
Learn more - 03Plumbing
Leak repair in Duvall
Leaks found with electronic detection instead of guesswork, then fixed for good: pipes, fittings, valves, fixtures, slabs and burst lines.
- — Leak detection behind walls, under floors and in slabs
- — Pipe, fitting and valve repairs (copper, PEX, galvanized, CPVC)
- — Burst and frozen pipe repair
Typical price: $500–$1,100 for most leak repairs
Learn more - 04Plumbing
Repiping in Duvall
Aging galvanized or polybutylene supply lines replaced with PEX or copper, with small access openings, a pressure test and a written warranty.
- — Whole-home PEX or copper repipe
- — Galvanized steel and polybutylene replacement
- — New shutoff valves at fixtures
- 05Plumbing
Sewer lines in Duvall
Main sewer lines camera-inspected, cleaned of roots and grease, and repaired or replaced when the pipe itself has failed.
- — Sewer camera inspection with the footage explained
- — Main line cleaning and root cutting
- — Hydro-jetting for grease and root buildup
- 06Heating & cooling
HVAC in Duvall
Furnaces, heat pumps, air conditioners and ductless mini-splits repaired, maintained and installed, plus duct cleaning and repair.
- — Furnace repair, maintenance and replacement
- — Heat pump repair and installation
- — Air conditioner service and installation
Also available in Duvall: faucet, toilet and fixture installation, 24/7 emergency plumbing, and the Dam Good Defenders Club membership.
- Upfront, written flat-rate price before any work begins
- Dam Good Guarantee: if something we fixed isn't right, we come back and make it right, no charge.
- WA contractor license BEAVEPI741J3
Good questions
Duvall plumbing FAQ.
Don't see your question? Call or text (425) 845-3535. A real person answers, 24/7.
Is Duvall's water hard?
No. Duvall buys all of its water from Seattle Public Utilities, normally from the Tolt River watershed, and the city's 2023 water quality report calls it very soft: about 1.48 grains per gallon, roughly 25 mg/L. The city says special softeners aren't necessary for clothes or dishwashers. In Duvall, a water heater's age matters more than minerals.
Do Duvall homes have lead pipes?
It's unlikely. The city has reported no known lead service lines in its water system, though a small number of homes and buildings may have lead connections, and only about 4% of Duvall homes were built before 1980. If you're concerned, run the tap 30 seconds to 2 minutes after water has sat for hours and have it tested; we can replace suspect fixtures or piping.
Nearby areas we serve
Sources for local facts on this page
- https://wa-duvall.civicplus.com/DocumentCenter/View/10878/2024-Water-Quality-Report-PDF
- https://www.duvallwa.gov/DocumentCenter/View/9392/2023-Water-Quality-Report-PDF
- https://www.valleyrecord.com/news/carnation-duvall-isolated-due-to-flood-waters/
- https://en.wikipedia.org/wiki/Duvall,_Washington
- https://en.wikipedia.org/wiki/Snoqualmie_Valley_Regional_Trail
- https://censusreporter.org/profiles/16000US5319035/
Plumbing problem in Duvall? Let's fix it right.
Free estimates, upfront flat-rate pricing, and a 24/7 emergency line at (425) 845-3535.