Oceanside & North County San Diego
Water Heater Installation & Replacement
A new tank installed, often the same day you call, with the permit, seismic straps and old-unit haul-away included.
When a tank water heater fails, you want hot water back today, not next week. If you call before noon we can often have a new tank installed the same day anywhere in North County.
We install 40- and 50-gallon gas and electric tanks from Bradford White, Rheem, A.O. Smith and other major brands, and we bring the installation up to current California code while we're there.
What's included
- New tank sized to your household
- Double seismic strapping as California requires
- New temperature and pressure relief valve piped to drain safely
- Expansion tank where your plumbing system requires one
- City permit and inspection
- Removal and disposal of your old tank
What it costs
A standard 40- or 50-gallon gas tank replacement typically runs $900–$1,800 installed in North County. Code upgrades such as a new expansion tank, venting corrections or a relocated unit push toward the upper end. You get the full number in writing before we start.
Every job starts with a free written estimate. The number you approve is the number you pay.
Installation: common questions
Installation across North County
Based in Oceanside and working throughout the region. Pick your city for local details, or see the full coverage map.
- Water heaters in OceansideZIP 92054, 92056, 92057, 92058
- Water heaters in CarlsbadZIP 92008, 92009, 92010, 92011
- Water heaters in VistaZIP 92081, 92083, 92084
- Water heaters in San MarcosZIP 92069, 92078
- Water heaters in EscondidoZIP 92025, 92026, 92027, 92029
- Water heaters in EncinitasZIP 92024, 92007
Also serving: Leucadia, Cardiff-by-the-Sea, Del Mar, Solana Beach, Rancho Bernardo, 4S Ranch, Rancho Santa Fe, Fallbrook, Bonsall, San Luis Rey, Poway, Carmel Valley, La Jolla. Not listed? Call (760) 753-3042 and ask.
Other services

Water Heater Repair
No hot water, a leak or an error code. We find the cause, quote the fix in writing, and usually repair it the same visit.
Book a repair
Tankless Water Heater Upgrades
Trade your tank for endless hot water. We size the unit, upgrade the gas line if needed, and handle the venting and permit.
Price a tankless upgradeWater Heater Maintenance
A yearly flush or descale, plus safety checks, so your water heater lasts longer and fails less often.
Schedule maintenanceGet your free estimate
Call us directly for the fastest response, or fill out the form and we'll get back to you within 1 business day.
Call
(760) 753-3042
For fastest service, call us directly
Business Hours
Monday–Friday: 7:00 AM – 6:00 PM
Saturday: 8:00 AM – 4:00 PM
Emergency calls taken 7 days a week
Welchplumbing@aol.com
We reply within 1 business day
Our Location
4035 Oceanside Blvd #A5, Oceanside, CA 92056
Get directions
