Water Heater Services in San Francisco
Expert installation, repair, and replacement of tank and tankless water heaters. Certified Rheem, Navien, and AO Smith technicians serving the Bay Area with same-day service.
Hot Water Experts
No Hot Water? We’ll Fix It Fast.
A failing water heater can disrupt your entire day. Whether your unit is leaking, producing lukewarm water, or has stopped working entirely, Isackson Plumbing responds fast to restore your hot water — often the same day you call.
We service all major brands and types — gas, electric, tank, and tankless — and we’ll help you choose the right system for your home, budget, and energy goals. Every installation is done to San Francisco code with permits pulled when required.
What We Offer
Our Water Heater Services
From a quick pilot light fix to a full tankless conversion, we handle every water heater job with precision and care.
Repair & Diagnostics
Pilot light issues, thermocouple replacement, leaking valves, sediment buildup, strange noises, and inconsistent temperatures — diagnosed and fixed fast.
Tank Water Heaters
Installation and replacement of 30–75 gallon gas and electric tank water heaters. We remove your old unit and handle all connections and code compliance.
Tankless Water Heaters
On-demand hot water with up to 40% energy savings. We size, install, and maintain tankless systems from Navien, Rheem, Noritz, and Rinnai.
Tank vs. Tankless
Which Water Heater Is Right for You?
Not sure whether to stick with a traditional tank or upgrade to tankless? Here’s a quick comparison to help you decide — and we’re always happy to walk you through the options in person.
Tank Water Heater
- Lower upfront cost
- Simple installation
- Works with existing gas/electric
- 30–75 gallon capacity
- Lifespan: 8–12 years
- Best for: budget-friendly replacement
Tankless Water Heater
- Endless hot water on demand
- Up to 40% energy savings
- Compact wall-mounted design
- Saves valuable floor space
- Lifespan: 15–20 years
- Best for: efficiency & long-term value
Left: 40-Gallon State Tank Water Heater. Right: Navien Tankless Water Heater.
Complete Water Heater Care
Everything We Service & Install
We handle every aspect of water heater work — from emergency same-day replacements to planned upgrades and routine maintenance that extends the life of your system.
✓ Tank water heater install
✓ Tankless water heater install
✓ Water heater repair
✓ Emergency replacement
✓ Tank-to-tankless conversion
✓ Expansion tank installation
✓ Anode rod replacement
✓ Thermocouple replacement
✓ Sediment flush & maintenance
✓ Gas line connection & repair
✓ Earthquake strap installation
✓ Recirculation pump install
✓ Pressure relief valve service
✓ Commercial water heaters
Warning Signs
When to Replace Your Water Heater
Don’t wait for a complete breakdown. Watch for these signs that it’s time to call us.
Unit Is 8–12+ Years Old
Tank water heaters typically last 8–12 years. If yours is approaching that range, proactive replacement avoids an emergency failure.
Inconsistent Water Temperature
Water that fluctuates between hot and cold or never fully heats is a sign of a failing heating element or thermostat.
Visible Leaking or Rust
Pooling water around the base, rusty water from the tap, or corrosion on the tank are signs the unit is deteriorating from the inside.
Strange Noises
Popping, rumbling, or banging sounds usually indicate sediment buildup hardening at the bottom of the tank — reducing efficiency and lifespan.
Rising Energy Bills
An aging water heater works harder to produce the same results. If your gas or electric bill is climbing, your water heater may be the culprit.
Running Out of Hot Water
If hot water runs out faster than it used to, the tank may be filling with sediment — or the unit may simply be undersized for your household.
Factory Certified
Brands We Install & Service
We’re certified on the industry’s most trusted water heater brands — and we service all major manufacturers.
Rheem
Certified installer. Tank & tankless, gas & electric. Industry-leading reliability.
Navien
Certified installer. Premium high-efficiency tankless and condensing systems.
AO Smith
Certified installer. Trusted residential and commercial water heating solutions.
We also service Bradford White, Noritz, Rinnai, Ruud, and all other major brands.
Need a Water Heater Repaired or Replaced?
Call now for a free estimate. Same-day installation available.