Expert Plumbing Services in San Francisco, California

Many San Francisco flats still carry their original galvanized steel water lines. The zinc coating inside those pipes wears away over the decades, and rust takes its place, narrowing the pipe and tinting the water. You notice it as weak pressure in one bathroom, brown water after a trip away, or pinhole leaks behind walls. Spot repairs buy time, but once rust is widespread, replacing the run with modern pipe is the fix that lasts. We map which sections are worst and stage the work so your water is off as briefly as possible.

Cast iron was the standard drain material in the city's older flats and apartment buildings, and much of it is now reaching the end of its life. Horizontal runs corrode along the bottom first, so the first leaks often appear in garage ceilings or basement joist bays below an upstairs bath. Slow drains, sewer odors, and damp spots that never quite dry are the early warnings. We find the failing section with a camera, replace it with quiet modern pipe, and leave the rest of the stack alone when it is still sound.

The pipe from your house to the street is called a sewer lateral, and in San Francisco the property owner owns the entire thing. Many laterals here are old clay, and every joint is an invitation to a thirsty street tree. Roots slip in, catch paper and grease, and the line starts backing up at the lowest drain in the house. A camera inspection shows exactly where the roots are entering. From there the options run from cutting and lining the line to full replacement, depending on how far gone the clay is.

California requires every water heater to be braced against earthquake movement, with strapping in the upper and lower third of the tank. Around San Francisco we still find heaters sitting loose in garages and closets, sometimes piped with rigid gas lines that would snap in a real shake. A toppled heater can break its gas connection, and broken gas lines are how fires start after a quake. We strap tanks to code, swap rigid connectors for flexible ones, and check the venting while we are there.

San Francisco runs a combined sewer, so wastewater and rainwater share the same pipes on their way to treatment. In a hard winter storm the system can fill faster than it drains, and sewage can push back up through floor drains in low-lying homes. It is a miserable surprise, and it tends to strike the same blocks again and again. A backwater valve on the building drain lets flow out but slams shut when the street side pushes back. We size and install them where the block's history says they earn their keep.

Pressure in this city follows elevation. A home near a ridge can see pressure high enough to hammer fill valves and shorten the life of a water heater. A home a few blocks downhill may run gentle by comparison. Most fixtures and appliances are built for a middle range, and a pressure regulator at the main brings the whole house into it. We test static pressure at an outdoor spigot, then set the regulator so showers stay strong without punishing the pipes. Homes without a regulator often show the damage first at toilet fill valves and washing machine hoses.