Tankless water heaters
What this service covers
Tankless units heat water on demand, free up floor space and commonly last twice as long as a tank. They are also the install most often done badly. An undersized gas line starves the burner, improper venting trips fault codes, and skipping isolation valves means the unit can never be descaled without cutting pipe.
We measure gas capacity from the meter forward, size the unit to your fixture count and inlet water temperature, and install isolation valves on every job so annual maintenance takes minutes instead of hours.
Tankless services
- New tankless installation, gas or electric
- Tank-to-tankless conversions with gas line upsizing
- Stainless or PVC venting installed to manufacturer spec
- Isolation valve kits on every install
- Annual descaling and filter service
- Fault code diagnosis and component repair
- Recirculation pump and comfort loop options
- Condensate routing on high-efficiency units
Our process
How we handle tankless water heaters
Load calculation
We count simultaneous fixtures and check inlet temperature to size the unit for real use, not a brochure number.
Gas and vent plan
Gas line capacity is measured from the meter and venting is routed to spec before anything is ordered.
Install
Unit mounted, gas and water connected, isolation valves fitted, condensate routed and combustion verified.
Maintain
We show you the descaling interval for North County hardness and can put you on an annual service visit.
Common questions
Tankless Water Heaters FAQs
Q. Do I need a bigger gas line for tankless?
Often yes. Many tankless units need considerably more gas than a tank heater, so we measure existing capacity first and include any upsizing in the quote rather than discovering it mid-install.
Q. How often does a tankless unit need descaling?
In North County hard water, once a year is realistic, or roughly every two years if you have a softener. Skipping it is the fastest way to lose efficiency and trigger fault codes.
Q. Will I get instant hot water?
You get endless hot water, not instant. Delivery time still depends on pipe run length. A recirculation loop is what solves the wait, and we can price one alongside the unit.
Q. Is tankless worth the extra cost?
If you are staying in the home long-term, want the space back, or keep running out of hot water, usually yes. For a short hold or a tight budget, a quality tank is the smarter buy.
Areas we serve
Where we handle tankless water heaters
We work out of San Marcos and cover North County San Diego from there. Pick your city for the local details that change how this job goes.
Business information
Swift Flow Plumbing — licensed plumbing in North County San Diego
Based in
San Marcos, CA. We are a mobile, service-area company — our crews come to you, so there is no public storefront to visit.
License
CSLB #1136062 — licensed and insured California plumbing contractor, locally operated out of San Marcos.