A pipe that is spraying right now gets a plumber sent today, not an appointment for Thursday. The truck carries copper, PEX, shark-bite couplings, water heater fittings, a drum machine and a sectional cable, so the leak is usually stopped and the repair finished on that first visit. You hear the repair price before anything is cut.
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Six boxes, about thirty seconds. You pick when to be called back, and that is when the phone rings.
Or call (408) 512-2397Water escaping into a house is not something you schedule around. It gets shut off, priced, and repaired on the same visit.
Active leaks, sewage indoors and a house with no supply are routed first. The plumber arrives with pipe, fittings and a drain machine already loaded, so the fix happens on that visit.
You are told the trip charge before a truck leaves and the repair total once the fault is found — not after a wall is open. A smaller job than expected is billed as the smaller job.
Galvanized supply lines, cast iron drains, root-packed laterals and scale from hard groundwater. The failures in this city are specific, and so is what gets loaded to fix them.
Coverage runs across Santa Clara County, from the older flatland tracts to the hillside subdivisions on both sides of the city.
There is nothing to fill in. The work is quoted before any of it starts.
Close the main valve or the one at the meter if anything is spraying. Then say what is wet, what is still running, and what you already turned off.
Those four point at four different sets of tools. A couple of questions decides whether a cable machine, a repair coupling or a service line crew needs to be on the truck.
Emergencies go out now. Everything else gets a real window. You will know which of the two you have before the call ends.
Illustrative photographs of the kinds of work described on this page. No specific San Jose property is shown.
San Jose houses were plumbed across seven decades with four different materials. Four things decide what gets loaded before the truck leaves.
An active leak is priced and scheduled differently from a drip, because the cost of waiting is drywall and flooring. Say whether you got the main closed.
Galvanized steel, cast iron, copper and PEX each fail their own way and each need their own fittings. The build era of the house is the fastest clue to which one is in the wall.
A trap, a branch, the building drain, or the lateral out under the sidewalk. Each step further out means a bigger machine, and past the property line it becomes a permit and inspection job.
An accessible property-line cleanout is the difference between reaching the lateral in minutes and pulling a toilet to get in. If you know where yours is, mention it.
Four failures account for most of the after-hours calls out of San Jose. Each one is explained in full below, including what to shut off before anyone arrives.
A pressure-side split is the one to stop before doing anything else. Close the house main; on many San Jose lots the backup is the meter-side valve in the sidewalk box. A Willow Glen galvanized joint, a copper pinhole in Cambrian, and a newer PEX fitting call for different repairs. Leave the wall closed until the failed material is identified.
One slow sink is usually a branch-line job. A shower plus a toilet or laundry standpipe backing up together points farther downstream, often the building drain or lateral. In older San Jose houses, a cable can reopen a scaled cast-iron line without explaining why it closed. Do not add chemical cleaner to standing water; a camera after clearing gives the useful answer.
Sewage at a shower, floor drain, or lowest toilet means stop every water use in the building. San Jose assigns the owner the whole lateral, with a limited City courtesy beyond an approved property-line wye cleanout. Roots can enter a tiny break, then grease and paper make the blockage complete. Clearing the line is urgent; deciding whether its pipe needs repair is the next step.
No water at every fixture deserves two checks before pipe work: confirm that nearby houses still have service, then look at the meter with all taps shut. A moving dial suggests a service-line leak; a still dial can mean a closed or failed main valve. San Jose Water source changes can alter hardness, but they do not make a whole-house supply disappear overnight.
Read this as background, not as a verdict on your house. The real fault gets identified by a plumber with hands on the pipe. Sorting out which of these four you are seeing simply keeps the correct machine from sitting back at the shop while you wait.
Checked against primary sources on 2026-08-21. Every claim below links to where it came from.
San Jose's median home was built in 1975, and roughly 144,000 of the city's 343,000 housing units went up between 1960 and 1979. The city's own housing element reports about 80% of the stock was built in 1960 or later, leaving about 20% pre-1960. The eras are geographic: Willow Glen bungalows date largely to the 1910s-1940s, Cambrian is mid-century 1950s-60s tract housing, Joseph Eichler's San Jose tracts were built between 1952 and 1963, and Almaden Valley and Evergreen filled in from the 1970s onward.
Why it matters: Build era is the fastest predictor of what is in the wall. Pre-1960 San Jose houses commonly still carry galvanized steel supply lines that fail as rusty pinholes at threaded joints, and cast iron drain and sewer lines that scale up internally and catch everything. The 1960s and 70s boom houses are typically copper, which pits and weeps at solder joints. That difference decides whether a leak is a section repair, a repipe, or a drain line that needs a camera after it is cabled.
Sources: point2homes.com · hcd.ca.gov · npgallery.nps.gov
San Jose Water publishes hardness by source: groundwater runs 11 to 26 grains per gallon, mountain surface water 5 to 12, and imported surface water 4 to 9. The utility's own threshold for calling water hard is 7 grains per gallon, or 120 parts per million.
Why it matters: Groundwater-served parts of San Jose are drinking water several times harder than the hard-water threshold. Dissolved calcium drops out as scale on the hottest surface it touches, which is the bottom of a water heater tank, and on every valve seat it passes. That is why tanks rumble and start leaking early here, why anode rods are consumed fast, and why angle stops and pressure regulators seize instead of turning.
Sources: sjwater.com · sjwater.com
San Jose requires a plumbing permit to install or replace a water heater, to do a repipe or water service project, and to repair or replace a building drain or building sewer or install a property line cleanout. Separately, the city's sanitary sewer FAQ states the property owner is responsible for maintaining the entire lateral. The city maintains the lower portion out to the main only as a courtesy, and only where an approved property-line wye cleanout exists within five feet of the property side of the sidewalk.
Why it matters: An emergency water heater swap or a sewer line repair in San Jose is a permitted, inspected job, not a quiet midnight replacement. Single-family and duplex permits are pulled online at SJPermits.org and a permit card lists the required inspections. The cleanout rule matters just as much during a backup: without an approved property-line cleanout the whole lateral is the homeowner's, and that fitting is also the access point a plumber needs to reach the line at all.
Sources: sanjoseca.gov · sanjoseca.gov · sanjoseca.gov · sanjoseca.gov
Yes. The city's own water heater page states plainly that installing or replacing a water heater requires a plumbing permit, and that an electrical permit may also be needed depending on the type. For a single-family house or duplex the permit is pulled online through SJPermits.org, and a permit card is issued listing the inspections. That is not optional paperwork you can skip because the tank failed on a Sunday. Venting, gas connections and seismic strapping are exactly what the inspection is checking, and this is earthquake country. A plumber can swap the tank now and carry the permit and inspection through afterward.
Because much of the city drinks very hard water. San Jose Water publishes hardness by source type: groundwater runs 11 to 26 grains per gallon, mountain surface water 5 to 12, and imported surface water 4 to 9, against its own threshold of 7 grains for water being called hard. Groundwater-served neighborhoods are getting water several times harder than that line. Dissolved calcium precipitates out as scale on the hottest surface it touches, which is the bottom of your water heater tank and the inside of every valve seat. That is why tanks rumble, why an anode rod is used up early, why angle stops seize, and why a heater that should last a decade starts leaking sooner here.
It depends on what is happening. Water actively escaping, sewage inside the building, or a whole house with no supply are dispatched as fast as a plumber can get across Santa Clara County, because all three get worse while you wait. A single slow drain, a dripping shutoff, or a running toilet is honestly better booked for daylight, when the work is done at a normal rate and a supply house is open if a part is needed. If your situation can wait until morning without costing you anything, you will be told that instead of being sold an after-hours visit you did not need.
Get the water stopped, get a real price before the pipe is opened, and get the repair done on the same visit. If water is still moving, close the main valve or the valve at the meter first, then call.
Call (408) 512-2397Upfront pricing · No obligation · Local Santa Clara County technician