24/7 emergency plumber in Covina

Most of the calls we take after dark fall into a short list. A supply line under a sink splits. A water heater lets go in the garage. The main sewer line backs up into a ground-floor tub. Someone smells gas near the range or the water heater. None of these should wait until morning, because every hour adds water damage, contamination or risk.

Covina's housing makes some of these more likely. The City's 2024 Housing Element says about two-thirds of the homes here were built before 1970, and code enforcement estimates about 30% of homes need some repair. Older galvanized supply pipe, clay or cast iron sewer laterals and water heaters installed long before today's rules all show up on emergency calls. Other problems feel urgent but can wait a few hours for a normal visit, as long as you can stop the water and the house is safe. The table below is how we sort calls on the phone.

Covina is not served by one water company. The City's own purveyor list names six suppliers that serve parts of the city. The City of Covina Water Division serves about 33,300 people through about 8,500 connections and about 102 miles of mains. The rest of the city is split among private and neighboring public suppliers. Neighbors on the same street can even have different suppliers. The only reliable way to know yours is the name printed on your water bill.

We list a number only where the City's sources agree on it. For Suburban, Azusa and Glendora customers, the City's purveyor list and its Water Division page show different numbers, so use the one on your bill. Our who to call for water, sewer and gas guide explains where each agency's job ends, and the Covina water suppliers guide has more on each supplier.

When sewage comes up through a tub, shower or ground-floor toilet, the line out of the house is usually blocked. Every flush, shower or washing machine cycle sends more water into a pipe that cannot drain, and it comes out at the lowest fixture.

1. Stop all water use. Tell everyone not to flush or run anything.
2. If neighbors on both sides are backing up too, the public main may be blocked. Call City of Covina Public Works at 626-384-5220.
3. Keep children and pets out. Wear gloves and boots if you must walk through it.
4. Skip chemical drain cleaners. They rarely clear a main line and make the water dangerous for whoever opens it.
5. Call (626) 746-1970. We clear the line from a cleanout and can run a camera to find the cause.

In Covina, who owns which pipe matters. City of Covina Public Works says the property owner maintains the sewer lateral, the pipe from the house all the way to the public main, and that includes tree roots in it. The City maintains the local mains under the street. The large trunk sewers belong to the Los Angeles County Sanitation Districts, which announced a relining project on about 20,736 feet of trunk sewer in July 2024. So a backup that only affects your house is almost always in your lateral and is your repair.

Roots and grease are the usual causes in older laterals, and with about two-thirds of Covina homes built before 1970, many laterals are clay or cast iron with joints roots can enter. Our sewer lateral camera and repair page covers what happens after the line is cleared, hydro jetting covers heavy roots and grease, and the Covina sewer lateral guide explains the ownership rule in full.

A water heater leaking from the bottom of the tank has usually rusted through and needs replacing. A drip at a top fitting, or water from the relief valve pipe, can often be repaired. If the temperature and pressure relief valve is spraying hot water or steam, never cap it. It is protecting the tank from over-pressure. Turn off the energy source, close the cold valve and call.

Covina's Handout #12, effective January 1, 2026, requires a plumbing permit for every water heater replacement, and the new heater must meet its rules for straps, gas connections, the relief drain and the drain pan. So a night call is usually about stopping the leak and getting the rest of the house back in water. The replacement follows with the permit pulled at Building & Safety, which issues permits in person at City Hall. Our water heater repair page walks through Handout #12 line by line, and the tankless water heater page covers that option if you are replacing anyway.

These are published third-party ranges, mostly national. After-hours calls, access through finished walls or slab floors, parts that must be found at night, and Covina permit requirements can push a job toward the top of a range. You get a written price before work starts. If the right move is to stabilize tonight and finish tomorrow, we say so and price each part separately. Call (626) 746-1970 for an exact quote. More ranges are in our plumbing costs in Covina guide.

One more protection: under California rules enforced by the Contractors State License Board, a down payment on a home improvement contract cannot be more than 10% of the price or $1,000, whichever is less. Be wary of anyone who asks for a large deposit in the middle of an emergency.