Burlingame owners replacing an old tank increasingly ask whether to go tankless or switch to a heat pump model. In a house built in the 1910s or 1920s, with the heater in a basement, a crawl space or a closet by the back door, the answer depends less on the brochure than on the house itself: the gas line, the vent, the panel and the space around the heater. A like-for-like tank is still the simplest swap, and in many homes it remains the sensible choice; the upgrade questions are worth asking before the old one fails, not on the day it does.
Burlingame's homes and heaters
The land was named in 1868 by banker William Ralston for his friend Anson Burlingame, the United States envoy to China. Burlingame incorporated in 1908 and grew into a tree-lined suburb of Tudor, bungalow, Spanish Revival and other styles. This page covers ZIP code 94010.
Homes range from early houses near downtown and on the hills to post-war homes and a large number of apartments and condominiums along El Camino Real. Heaters sit in basements, crawl spaces, garages and apartment closets, mostly gas. Summers are mild, winter inlet water is cool and many older houses have had heaters moved or vents altered over the decades.
Gas line and vent decide the fit.
Cold inlet water and winter recovery in Burlingame
In winter the water reaching a Burlingame heater is noticeably colder than in late summer. A tank has to lift it further to reach its set temperature, so recovery slows, and showers that ran fine in September start running short in January. In an older house with a small original tank, that shortfall is often the first complaint.
A heater in a basement or crawl space loses a little more heat to cool surroundings as well, and long pipe runs through a chilly subfloor cool the water before it reaches the tap. Insulating accessible pipe helps both,, and it costs little compared with a larger heater. On the hillside streets, a heater in a lower-level garage can be a full floor below the bathrooms, which adds to the wait at the tap even when the heater keeps up; a recirculation pump on a timer is one answer.
Before sizing up, rule out sediment taking room meant for hot water, a broken dip tube mixing cold into the outlet, or a weak burner slowing recovery. A technician checks those first. If the heater is sound, a larger tank, a higher-output model or a heat pump unit sized with spare capacity may be the answer.
Tankless sizing at a winter inlet temperature
A tankless unit's output is fixed, so the colder the incoming water, the less hot water it can deliver at a given temperature. A unit sized from a summer figure can fall short on a January morning when two showers run at once, which is why installers size from the coldest water the unit will see, not an average.
In an older Burlingame house, the gas supply is often the limiting factor. A tankless unit at full output needs far more gas than the tank it replaces, so the meter, the line and any other appliances on it are checked, and a larger line may be needed. Venting is new as well, often through a wall rather than the old chimney.
Where the gas line or venting routes make tankless impractical, a heat pump water heater is the other upgrade people weigh. It needs space, a condensate drain and a circuit, which a basement or garage may offer. It recovers more slowly than a gas tank, so sizing with spare capacity helps in winter. Programs vary; check with your utility if you are weighing a heat pump.
Basement, crawl space or garage.
The relief valve
Every tank has a temperature and pressure relief valve near the top, with a pipe running from it. It opens if pressure or temperature climbs too high, releasing water rather than letting the tank fail. It's the heater's last line of defense, and it should never be capped, plugged or removed.
Homes on Burlingame's hillside streets often have a pressure regulator, which closes the system. As the tank heats, the expanding water has nowhere to go and the valve lets a little out, so a drip after each heating cycle usually means an expansion tank is needed rather than a new valve. A valve running steadily needs a technician promptly.
In a basement or crawl space, the discharge pipe should end where released water can't hurt anyone or damage the house, and old installations sometimes ran it somewhere unhelpful. At replacement, the installer fits a new valve and checks the route. Testing the valve is a job for the technician.
Strapping in Burlingame
Straps or a bracing kit are how a California water heater is anchored whatever the make or size. A tank in service is heavy and narrow for its height, and it only stays upright when the ground moves, with its gas, water and vent lines intact, if it is secured. It's part of every Burlingame replacement and checked when a home is sold.
Garage studs take straps directly, and a concrete wall takes masonry anchors. A basement heater may stand against a concrete wall that calls for masonry anchors, and a crawl-space heater is secured to the framing around it. Fresh straps and flexible connectors go in with every new tank, and the installer points out where the new lines run. Details such as bracing height and fastenings follow local requirements, which the installer confirms and explains them in plain terms.
An older heater that has no straps can still be braced in place, so replacement is not required for that alone. In an old basement, straps sometimes run to a pipe or a loose board rather than solid framing or masonry, and those are replaced. A tankless unit is supported by its own bracket.
Fit and venting in Burlingame
In an older house, measure twice. A modern tank may be wider or taller than the original, and a basement stair or crawl-space hatch has to let it through. Older gas heaters often vent into a masonry chimney shared with a furnace; if the furnace has been replaced, the chimney may need a liner or the heater a new vent. The installer checks the route, the fit and the air supply before recommending a model. For tankless, a vent through an outside wall needs clearance from windows and doors; for a heat pump unit, the space must breathe.
Burlingame ZIP code
ZIP codes served: 94010
Nearby areas with their own pages include Millbrae, San Mateo, San Bruno, Belmont and South San Francisco. See every city in the Bay Area.
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Burlingame water heater FAQs
The technician shuts off gas and water, drains and disconnects the old heater and carries it out. The new one is set, strapped and connected with new fittings, the relief line is routed and the vent checked. Then it's filled, tested for leaks and started.
Often they haven't; many are simply old. Where one does fail early, the usual causes are high pressure without an expansion tank, an anode rod that was never checked, or a tank in a damp crawl space where the base corrodes.
In Burlingame, far less than inland, since summers here are mild. A closed garage on a warm spell still ages the plastic drain valve, washers and connectors over time, and stored paint or fuel should be kept well away from a gas burner.
It can. A basement stair, a crawl-space hatch, framing hidden behind plaster or a vent shared with an old furnace can each add work. None prevents a replacement; the installer checks each first and explains any change and its price before the job starts.
Vents wear out along with heaters. A connector may be rusted or at the wrong height for the new tank's outlet, a chimney liner may have deteriorated, or a vent may be shared with a furnace that has changed. The installer inspects it and explains any change first.
Leaks, air and access. A leak there can soak subfloor or finished floors unseen, so a drain pan and a leak alarm help. A gas heater needs its air supply kept clear, and a crawl-space hatch has to be large enough to bring a new tank through.
Yes. A relief valve that drips after every heating cycle, a weeping fitting or a slow tank leak can waste a surprising amount over a month, and a gas tank reheats the water it loses. An unexplained rise in the bill is worth a look at the heater.
Not in itself; many older Burlingame homes are set up that way. It's worth keeping the area dry and clear, the air supply open and the path down the stairs free, since a replacement tank has to come through it. A leak alarm helps where no one looks daily.