Water Heater Replacement
Pulled the failed tank and set a new electric water heater the same visit — supply lines, T&P drain line and strapping all brought up to current code.
Thinking about tankless in Sunnyvale? Soft Hetch Hetchy water makes this one of the best cities in the county for a tankless heater — and we handle the gas sizing, venting and city permit as one job.
Sunnyvale has a genuine advantage most of Santa Clara County does not: a large share of the city's supply comes from the SFPUC's Hetch Hetchy system, which is remarkably soft. Scale is what kills tankless heat exchangers, so a tankless unit installed in Sunnyvale typically needs descaling far less often than the same unit five miles east in Cupertino or San Jose. If you have been told tankless is a bad idea in the Bay Area because of hard water, that advice was written for a different city.
The real work in a Sunnyvale install is rarely the heater. It is the gas supply and the venting. A tankless unit fires at 150,000 to 199,000 BTU where the old tank used 40,000, and most 1950s and 60s homes in Ponderosa Park, Birdland and Cherry Chase were plumbed with a 3/4-inch gas line that will not carry that load over the run length. We do the gas calculation before quoting, and if the line needs upsizing to one inch we say so in the quote rather than discovering it on install day. Venting is the other constraint: condensing units need stainless or PVC out through a stucco wall or roof with a condensate drain, and the Heritage District's older homes often have no straightforward path.
Eichler homes around Ponderosa and the Fairbrae area need extra thought — flat roofs, radiant slab heating, and no attic to run vent through. It is usually still doable, but it is an exterior-wall install with a specific unit choice, not a generic swap. Everything is permitted through the City of Sunnyvale, and we handle inspection.
ZIP codes served: 94085 · 94086 · 94087 · 94089
Hetch Hetchy supply means far less scale than the rest of the county. Tankless lifespan and service intervals both improve here.
A 199,000 BTU unit on a 1950s 3/4-inch line will underperform or fault. We calculate before quoting, not after.
Heritage District and Eichler homes need a planned vent route and condensate drain. This is where cheap quotes fall apart.
Same-day windows across 94085, 94086, 94087 and the rest of Sunnyvale, seven days a week from 7AM to 9PM, with a flat-rate price quoted before any work starts.
Pulled the failed tank and set a new electric water heater the same visit — supply lines, T&P drain line and strapping all brought up to current code.
Navien tankless mounted on the exterior wall with new gas flex, isolation valves and a scale-prevention filter. Endless hot water and the old tank space back.
Our own vans and a small local team you can reach directly — no call-center runaround.
“Umed came out and diagnosed the issue with my Rinnai tankless water heater quickly and efficiently. Communication was excellent — he worked with Rinnai to sort out the warranty and got the parts covered. The intermittent cold water issue is gone, and it was caught just in time. I’ll definitely ask for Umed again.”
“Our 20-year-old gas water heater sprung a leak, so we used the San Jose Clean Energy incentive to switch to a heat pump unit. Umed was the first to respond — at 2am — and followed up with a site visit right away. Quick to answer questions, competitively priced, and he even got the city inspection moved up and approved ahead of schedule.”
“The technician who came was Umed. He was super courteous and even used shoe covers before entering my house. He gave me a helpful presentation on water heaters that answered a lot of my questions, was patient, and never did a hard sell. Thanks Umed!”
Flat-rate pricing quoted before work starts, same-day windows across Sunnyvale, open seven days a week from 7AM to 9PM. Licensed & insured, CSLB #1160220.