Gas and electric tanksRepaired and replaced
Pressure checkedExpansion control with every install
Upfront pricingBy the job, not by the hour
How old is the tank in your Maple Valley home?
A tank water heater usually lasts somewhere around 8 to 12 years. Set that against when Maple Valley was built: the city’s housing study says the majority of homes here went up between 1990 and 2010. The original heaters in those houses are long gone. By simple arithmetic, a home from that period is on its second tank at least, and that replacement may now be old enough to be the next to fail.
A tank rarely announces the day. What it does give you is a few early hints:
- Hot water that fades sooner than it did a year ago
- Popping or rumbling as the burner or elements heat through sediment
- Rust-tinted hot water, while the cold runs clear
- Dampness or a rust trail at the base or around the fittings on top
- A relief valve that drips into its drain line
- A date on the label that’s a decade or more back
North side or south side: what’s in the water
Maple Valley’s tap water comes from two different places, depending on which district serves your street.
On the north side of the city, Cedar River Water and Sewer District buys most of its water from Seattle Public Utilities. It starts as snowmelt in the protected Cedar River Watershed, and the district reports it as naturally soft: 1.2 to 1.7 grains of hardness per gallon. Soft water is easy on a water heater. Elements and tank walls collect very little mineral scale.
On the south side, Covington Water District draws mainly on the Green River through a regional supply shared with Tacoma, and adds water from its own wells. The district adjusts pH to make the water less corrosive to household pipes.
Neither supply makes a tank last forever. Sediment still settles at the bottom, and the anode rod that protects the steel still gets used up. A periodic flush, which we can do during a service visit, keeps a tank quieter and more efficient.
Pressure, PRVs and the expansion tank
This is the part of a water heater job that’s easiest to overlook. Both of Maple Valley’s water districts split their systems into pressure zones: the city’s comprehensive plan counts nine in Covington Water District’s and 23 in Cedar River’s. A home that sits low in its zone can see pressure above the 80 psi the plumbing code allows, and the fix is a pressure-reducing valve on the main line.
That valve also turns the house into a closed system. When the heater warms a tank of cold water, the water expands, and with the PRV in the way it can’t push back toward the street. Pressure climbs until the relief valve drips or a fitting gives. An expansion tank absorbs that surge, but only if it’s sized and charged to match the house pressure. We check both whenever we install a new heater.
Gas, electric and the city permit
Puget Sound Energy supplies both electricity and natural gas in Maple Valley, so a home here may have either kind of tank. We repair and replace both.
Inside city limits, the City of Maple Valley handles permits. Its guidance lists replacing fuel-burning appliances, hot water tanks included, among the work that requires one, and the permit office issues residential plumbing permits over the counter. If your Maple Valley address is in unincorporated King County, plumbing permits come from King County’s Public Health department instead. We’ll tell you which applies when we price the job.
Repair the heater or replace it?
Worth repairing
On an electric tank, a heating element or thermostat that has burned out. On a gas tank, a failed thermocouple or control valve. On either, a relief valve that has simply worn out. If the tank has years left in it, these are sensible repairs.
Time for a new tank
Water coming from the tank itself, not a fitting. A heater old enough that each repair is followed by another. A household that has outgrown the tank. Money spent here is better put toward a replacement.
You’ll get an upfront price for each option, by the job and not by the hour, before any work starts. A new tank goes in the way Washington code calls for:
- Seismic straps holding the tank to the wall
- An expansion tank where the system needs one
- A relief valve piped to a proper drain line
- Venting and gas connections checked on gas units
Thinking about tankless? Artisan is a Rinnai-trained dealer. Read about tankless water heaters to see what a tank-to-tankless conversion involves. Hot water problem at only one tap? That’s usually a plumbing repair, not the heater.
Water Heaters FAQs
Who issues the permit when a water heater is replaced in Maple Valley?
Inside city limits, permits come from the City of Maple Valley, not King County. The city’s permit guidance lists installing or replacing fuel-burning appliances, hot water tanks included, among the work that needs a permit, and its permit office issues residential plumbing permits over the counter. When we price your replacement, we’ll spell out what yours requires.
Is Maple Valley’s water hard on water heaters?
It depends on your district. Cedar River Water and Sewer District, on the north side, reports naturally soft water at 1.2 to 1.7 grains per gallon, which leaves little mineral scale on heating elements. Covington Water District, on the south side, blends Green River water with its own wells. Either way, sediment still settles in the bottom of a tank over the years, so an occasional flush is worth doing.
Why does the relief valve on my water heater keep dripping?
Often it’s pressure, not the valve. Water expands as it heats. In a house with a pressure-reducing valve, which homes low on Maple Valley’s hills may need, that expanded water has nowhere to go unless there’s a working expansion tank. The relief valve opens to let it out. We test the pressure and the expansion tank before replacing anything.
My house was built around 2000. Is the water heater due?
If it’s the original, it’s well past the usual life of a tank. More likely you’re on the second one, and that one may be getting old too. The manufacture date is on the rating label. If the label says ten years or more, plan the replacement now, while you can choose the timing.
We have Puget Sound Energy gas. Should the new heater be gas or electric?
In most cases, replacing like with like keeps the job simple, because the venting, gas connection or wiring is already in place. A gas tank reheats faster than most electric models, which matters for a busy household. We’ll look at what your home is set up for and price the options.
Do you install tankless water heaters in Maple Valley?
Yes. Artisan is a Rinnai-trained dealer. If you’re weighing a tank against a tankless unit, we can look at how your home is set up and how you use hot water, and tell you whether a conversion makes sense.