Novato sits at the north end of Marin, and its homes differ from those in the towns to the south. Where San Rafael and the older towns have many early twentieth-century houses on steep lots, much of Novato was built in the 1960s and 1970s as single-story and split-level tract homes with the heater in an attached garage. Summers here are warmer, winters a little colder. That shapes the tank-or-tankless question many owners now face, and the sections below walk through it.
Novato homes and heaters
Early settlers bought large tracts in the 1850s and planted orchards and vineyards, and a post office opened in 1856. Novato incorporated as a city on January 20, 1960. This page covers ZIP codes 94945, 94947 and 94949.
Homes range from older houses near downtown to post-war and 1960s to 1970s tract neighborhoods, hillside homes, townhomes, condominiums and newer developments. Heaters sit in attached garages, lower levels, interior closets and some exterior closets, mostly gas. Many tract homes are on their third or fourth heater, and the water's mineral content is described in your provider's annual report.
Where tankless fits in Novato
A tankless unit suits a Novato home that wants the garage corner back, or one where several showers run at once. It needs a gas line sized for full output, which original tract lines often aren't, its own vent through a wall, service valves for descaling and sizing for cold winter water. In a townhome, association rules shape the vent route; a like-for-like tank remains the simplest swap.
Flush, anode and relief valve.
Tankless descaling as real maintenance
Whatever the water, a Novato tankless unit collects some scale in its heat exchanger over time. Heating water in the narrow passages pulls minerals out of solution, and they cling to the walls. Flow falls, the temperature at the shower starts to wander, and eventually the unit shows an error code.
Descaling reverses it. With the unit isolated at its service valves, the technician pumps a descaling solution through the exchanger, flushes it clean, clears the inlet screen and checks the burner, vent and condensate drain. Units installed without service valves usually get them at the first visit.
How often depends on the water, the household's use and the temperature setting; the first service shows how quickly scale is returning and sets the schedule. Skipped for years, a heavily scaled exchanger can overheat and crack, which usually means a new unit.
A scale-reducing cartridge ahead of the unit slows the buildup where the water calls for it. Ask the technician to note the date and what came out, so the next visit can be timed well and nothing is left to memory.
Lower levels and below-grade rooms
Most Novato heaters sit at garage level, but split-level and hillside homes sometimes put the heater in a lower-level room beside the furnace, below the main floor. It's out of the way, which is also the problem: a slow drip there can run for a while unnoticed.
A drain pan with a line to a safe spot, an alarm that sounds upstairs and a clear floor around the heater are the first protections. Keep storage off the burner's air openings and the stairway clear, because the next tank travels the same route.
Venting from a lower level runs further and is often shared with the furnace, so it's checked carefully at replacement. Where the route in is awkward, a tankless unit on an outside wall is sometimes the tidier solution, freeing the room for storage.
A lower room that stays damp is hard on a heater's gas control and base, so good ventilation helps, and any rust ring on the floor deserves a technician's look before it turns into a leak.
Sized for January, not July.
What a replacement day involves
In a typical Novato tract home, replacement day is straightforward: the technician parks in the drive, shuts off the gas or power and the water, and drains the old tank through a hose to a safe spot before carrying it out of the garage.
The new heater goes in with fresh flexible connectors, straps, a new relief valve and discharge line where needed and, behind a pressure regulator, an expansion tank. The vent is reattached and checked, gas joints are leak-tested and the tank is filled before the burner is lit.
The technician checks the temperature, points out the shutoffs and hauls the old heater away. A lower-level or townhome closet job takes more handling, and a switch to tankless or a heat pump model takes longer because of gas, vent or electrical changes; the plan and price are set out first.
Clearing the garage corner, moving the car and securing pets before the visit keeps the day moving. Ask whether removal of the old heater is included when you get the price.
Strapping in Novato
A California water heater is anchored with straps or a bracing kit rather than left free-standing. Once filled, a water heater is heavy and sits tall on a small base, 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 Novato replacement.
A garage wall of bare studs makes the strapping simple. A lower-level heater against a concrete wall needs masonry anchors, an exterior closet may need blocking and a townhome closet may have metal studs. A new tank is usually wider than the old one and gets fresh straps and connectors, and the installer points out where the new lines run. What is required depends on the local rules, and the installer confirms them as part of the visit.
An existing heater in good order that was never strapped can be secured as it stands, and straps that have slackened are snugged up during service. Where a strap was fixed only to garage drywall, it's refastened into the studs, and shelving or boxes may need moving so the straps sit at the right height. Before work starts, ask what the heater will be fastened to, and ask to see it when the job is done.
Comparison points
- Up front: a garage tank swap costs least; tankless adds gas and vent work.
- Winter: a tank's stored water helps on cold mornings; tankless is sized for them.
- Garage space: tankless mounts on the wall and frees the corner.
- Summer warmth: a warm garage also suits a heat pump model.
Novato ZIP codes
ZIP codes served: 94945, 94947, 94949
Nearby areas with their own pages include San Rafael, Fairfax, San Anselmo, Greenbrae and Larkspur. See every city in the Bay Area.
Popular services in Novato
Novato water heater FAQs
If the cold supply valve above the heater is safe to reach, close it, keep away from wet cords and outlets, and call. If water keeps coming, shut the home's main valve. If you smell gas, leave the house, then call the gas utility and 911 from outside.
Usually a failed heating element or thermostat, or a high-limit switch that has tripped to shut the heater off for safety. Scale buried around the lower element can cause it too. Electrical testing is a technician's job; they check each part and explain the repair.
The pipe from the heater to the tap holds water that has cooled, and it has to run out first, so the farthest bathroom waits longest. It's distance, not heater size. A recirculation pump on a timer, insulated pipe or a small heater near that tap helps.
Probably not. When both run tinted, the cause is usually in the pipes or the supply, such as older galvanized lines or work on a nearby main. If only the hot is tinted, the tank or a fitting on top is the likelier source.
Novato's summers run warmer than southern Marin's, and a closed garage on a hot afternoon ages plastic drain valves, rubber seals and wiring faster. Stored paint or fuel gives off more vapor near a burner. Keep the space clear; the warmth does suit a heat pump unit.
The water arriving at the heater is colder in winter, so a tank recovers more slowly and a tankless unit delivers less flow. A heater in a cool lower level or garage loses more heat, and a worn dip tube or burner makes the difference more noticeable.
With a fixed heating output, a tankless unit delivers less hot water at the set temperature when the incoming water is colder. A unit that runs two showers in September may manage one in January, which is why installers size from the winter inlet temperature.
Yes. We connect callers with independent water heater pros across all three Novato ZIP codes, from the older streets downtown to the tract neighborhoods, hillside homes and newer developments. San Rafael has its own page, as do the towns to the south.