Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
Water Heaters
Hot water, restored — same-day in most cases.
From a no-hot-water emergency to a planned tank-to-tankless upgrade, our licensed plumbers handle every water heater on the market — Rheem, A.O. Smith, Bradford White, Navien, Rinnai, State, and more. Most repairs are completed in a single visit; most replacements are completed same-day.
We size every replacement to your household, handle every available rebate, and back the work with a written labor and parts warranty.
- Licensed plumbers Washington & Idaho licensed, bonded, and insured — never sub-contracted.
- Stocked trucks Pipe, fittings, fixtures, and diagnostics on board — one-trip repairs.
- Flat-rate quotes Approved before any work — never charged by the hour.
- Warrantied work 1-year labor warranty plus full manufacturer parts coverage.
When to Call
Water heater warning signs
Water heaters usually give you days or weeks of warning before they fail outright. Catch these and you avoid the cold-shower emergency.
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No hot water
Pilot light, gas valve, heating element, or thermostat — diagnosed same-visit.
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Leaking tank
A leaking tank is past saving — replacement is the only safe option.
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Rumbling or popping
Sediment buildup on the bottom of the tank — accelerates corrosion and shortens life.
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Rusty or discolored hot water
Tank corrosion or a failed anode rod. Often replaceable if caught early.
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Tank over 10–12 years old
Tanks last 8–12 years on average. Past 10, replacement before failure is much cheaper than after.
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Rising gas or electric bill
Aging or sediment-filled heater works harder for less hot water.
What We Service
Every water heater service
Tank, tankless, hybrid, electric, gas, and commercial-capacity systems — installed and serviced by licensed plumbers.
- Water heater repair Pilot, ignition, heating element, gas valve, thermostat, and T&P valve service.
- Water heater replacement Same-day tank or tank-to-tankless replacement. Old unit hauled away.
- Water heater maintenance Annual flush, anode rod inspection, T&P test, and combustion check (gas units).
- Tankless water heaters Endless hot water installs from Navien, Rinnai, A.O. Smith, and others.
- T&P valve service Temperature & pressure relief valve replacement — critical safety component.
- Anode rod replacement Replace sacrificial anode rod to extend tank life 3–5+ years.
- Gas valve & burner service Pilot replacement, thermocouple service, and burner cleaning.
- Recirculation systems Hot water on-demand pumps for faster delivery at distant fixtures.
How It Works
Our water heater service process
Same flat-rate, written-quote process as the rest of our work.
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Call & schedule
Same-day appointments for most water heater calls. 24/7 emergency dispatch for leaks.
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Diagnose
Plumber inspects the system, identifies the issue, and walks you through repair vs replace.
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Approve the price
Flat-rate quote in writing before any work begins.
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Fix & guarantee
Most repairs and replacements done same-day. Written labor and parts warranty.
Why Choose Mainstream
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed in Washington and Idaho, bonded, and insured for your protection.
Satisfaction Guaranteed
If it isn't right, we make it right. Period.
No hot water? Leaking tank? We can help.
Same-day service across Spokane & Coeur d'Alene — flat-rate pricing, no surprises.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Ricky Saldana the technician that came out was fantastic. He was so knowledgeable about my plumbing issues and his recommendations were spot on. He was on time and very pleasant to work with. I would highly recommend him for any plumbing work that needs to be done.
Thanks Ricky for all of your input.
★★★★★
Jake was on time and very good about looking at my furnace. I appreciate all his help. I reccomend him and mainstream electric very highly. thank you Sharon Scott
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Water Heater Services — Frequently Asked Questions
How long does a water heater last?
Tank water heaters last 8–12 years on average. Tankless units last 15–20 years with proper maintenance. Annual service (anode rod check, tank flush, T&P valve test) extends life significantly.
Tank or tankless?
Tankless gives you endless hot water and lasts roughly twice as long as a tank — but costs more up front and requires correct gas/electrical sizing. For most households with normal hot-water use, both work; for large families or homes with multiple simultaneous demands, tankless is a clear winner. We’ll model the math both ways.
Is replacement same-day?
Most straightforward tank replacements are completed the same day. Tankless installs that involve gas or electrical upgrades may take a second day. We confirm timing when we quote.
What rebates are available?
Avista offers rebates on qualifying high-efficiency tank, tankless, and heat-pump water heaters. Federal tax credits cover up to 30% of qualified heat-pump water heaters. We handle all the paperwork.
Is the work warrantied?
Every install includes a 1-year Mainstream labor warranty plus the manufacturer warranty (typically 6–12 years on tanks, 12–15 years on tankless). Care Club members get extended labor coverage.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
