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Thermostatic Mixing Valves · Sonoma County · Licensed C-36
Thermostatic mixing valve installation & repair — safe, steady water temperature.
Simeone Plumbing is your go-to team for thermostatic mixing valve work across Sonoma County. A TMV blends hot and cold water to deliver a safe, consistent temperature and guard against scalding — we install, replace, and repair them, at a price agreed before we start.
often available
Our thermostatic mixing valve services
We size and install thermostatic mixing valves on water heaters and at fixtures.
Swap failed or corroded mixing valves for reliable temperature control.
Restore steady temperature when a valve drifts, sticks, or runs hot and cold.
Protect children, seniors, and tenants from sudden bursts of scalding water.
Meet current code on new water heater installs and remodels.
Mixing valves for businesses, ADUs, and rental properties.
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Why Sonoma County homeowners call Simeone
From a dripping faucet to a whole-home repipe, one trusted local team handles it all — at a price you approve first.
Local & responsive
- Same-day appointments often available
- Crews based in Sonoma County
- We know local homes & water
Upfront, honest pricing
- A fixed price before we start
- No hourly clock
- No pressure, no upsells
Licensed & guaranteed
- CA C-36 #890196
- Family-owned since 2007
- Make-It-Right Guarantee
Everything we do
Full-service plumbing in Sonoma County
Residential plumbing
Repairs, installs, water heaters, drains, leaks, fixtures, repipes, and remodels for Sonoma County homes — done cleanly and backed by our guarantee.
Commercial plumbing
Dependable plumbing for Sonoma County businesses, property managers, and light commercial — from service calls to tenant improvements.
How it works
How it works
1
Book in minutes
Call or book online and tell us what’s going on at your Sonoma County property.
2
Fixed price first
We diagnose and give you one upfront price — no hourly clock.
3
Done right
We do the work cleanly, test it, and back it with our Make-It-Right Guarantee.
4
Backed in writing
Every job is backed by full warranties — plus our Make-It-Right Guarantee on workmanship.
Local since 2007
Your Sonoma County neighbors count on us.
Simeone Plumbing has served Sonoma County homes and businesses since 2007 — from Rincon Valley and Bennett Valley to Oakmont, Fountaingrove, and downtown. Licensed, family-owned, and backed by our Make-It-Right Guarantee. See our Make-It-Right Guarantee for details.
- Serving every Sonoma County neighborhood
- Licensed CA C-36 #890196
- Upfront pricing — no surprises
- Family-owned since 2007
Reviews
Sonoma County neighbors, in their words
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We moved into a house that needed some sewer work done, called around and got three estimates and we decided to work with Simeone. From the first time we chatted... read more Jordan L.
11/12/2025 Amazing people! They really saved my butt on this one. They were able to quickly come out and line a pipe. Very professional. Did an amazing job. Gina and... read more Michael O.
10/30/2025 I have an old family cabin on the Russian River that is complicated to access (it's actually on a trail). With flooding in the area it got even harder. Gena... read more Liz R.
3/11/2025 - Friday night a few weeks. I received an email from windsor water department. Saying I was using 3 too 4 times. I searched the 3 access and 9 single family... read more Peter M.
9/04/2024 We recently had Simeone Plumbing replace our aging 75-gallon water heater, recirculating pump and leak detector. They responded quickly to our inquiry and Domenic himself came out to review... read more K T.
8/10/2024 Very happy with the service we received! I needed my water heater replaced. They were so quick to respond and got the job done the next day! And the price... read more SJ K.
7/18/2024 - I have worked with Simeone for years now, and they are amazing. Their plumbers, their office, and their ownership have been nothing but responsive and helpful and always make... read more Dee Dee G.
11/20/2023 Our old boiler died. The local plumbing company gives terrible service, and quoted an outrageous price for a new boiler. We contacted a top notch boiler manufacturer, and they... read more Lorna E.
4/13/2023
Good to know
Sonoma County plumbing questions, answered
What areas of Sonoma County do you serve?
All of Sonoma County — Santa Rosa, Windsor, Healdsburg, Petaluma, Rohnert Park, Cotati, Sebastopol, Sonoma, and across Sonoma County, and surrounding neighborhoods — plus the rest of Sonoma County.
Do you offer same-day plumbing in Sonoma County?
Often, yes — same-day appointments are frequently available. Call and we’ll tell you the soonest we can be there.
Will I know the price before you start?
Always. You get a fixed price upfront before any work begins — no hourly surprises.
Do you handle both repairs and installations?
Yes — from a single repair to water heaters, repipes, gas lines, and remodels, for homes and businesses across Sonoma County.
Need a plumber in Sonoma County? Let’s get it scheduled.
Same-day appointments often available across Sonoma County.