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Plumber guides and answers

Plain answers to Los Angeles plumbing questions, grouped by problem, with what you can try yourself and where the law says to stop.

Cutaway of a house with water meter, gas meter, toilet and drain, water heater and fixtures each tagged with the guide group that covers it

These are the guides behind City of Angels Plumbing, a mobile plumbing service for the City of Los Angeles. Each one answers a single question about a home plumbing problem: what is going on, what you can safely try, what the work costs, and when a local plumber needs to come to you. Nothing here is padded. If a topic did not deserve its own page, it sits inside a bigger one.

The guides are written for Los Angeles houses and apartments: 1940s copper and galvanized supply lines, cast iron drains, hillside lots with odd water pressure, hard water, gas appliances and earthquake rules. Where a rule comes from the city or the state, the page names it and links the source, so you can check it.

Where should I start with a plumbing problem?

Start with the symptom, not the part. If water is spreading, shut off the main valve first, then read the burst pipe or leak guide. If something smells like gas, leave the building and call SoCalGas from outside. Everything else can wait ten minutes while you find the right page below.

Five symptoms matched to first actions: water spreading, gas smell, no hot water, blocked drain, wanting a price

Three groups answer most first calls: the leak and burst pipe guides for anything wet, the water heater guides for a cold shower, and the toilet and drain guides for blockages. Each group below starts with a short answer, then lists every page in it.

If you already know you want a price, jump to the cost guides. The quote form gets a local plumber to your door with a written figure.

What do the toilet guides cover?

The toilet guides cover every common fault, from a handle that sticks to a bowl that will not stop filling. Most are cheap fixes you can do in half an hour with a few parts. A few, like a leak at the floor, are worth a plumber, because a wet subfloor costs far more than the toilet.

What do the drain and smell guides cover?

These guides cover slow drains, full blockages and the smells that come up from them. Most clogs sit in the trap or the first few feet of pipe, which you can often clear with a plunger or a hand tool. A smell that arrives with gurgling is different, and the sewer odor pages explain why.

What do the water heater guides cover?

The water heater guides cover choosing, repairing and replacing a tank or tankless unit, plus the Los Angeles permit and safety rules. Replacing a heater needs a permit and strapping against earthquakes, so the replacement pages spend as much time on the rules as on the hardware.

What do the leak and burst pipe guides cover?

These guides cover water where it should not be: a burst pipe, a drip under the sink, a stain on the ceiling or a bill that climbed with no visible cause. They start with stopping the water and then move to finding the source and deciding on a repair.

What do the water pressure guides cover?

The pressure guides cover low flow at one tap or the whole house, plus the opposite problem, pressure that is too high and bangs the pipes. Low pressure at a single fixture is usually a clogged aerator or cartridge. Whole-house loss points to the valve, the regulator or old pipe.

What do the repiping and remodel guides cover?

The repiping guides cover replacing old supply lines, which is common in Los Angeles because so many homes date from before 1960. They compare materials, explain which kinds of pipe fail and why, and cover the plumbing side of remodels and new builds, including permits.

What do the commercial plumbing guides cover?

The commercial guides cover plumbing in shops, restaurants, offices and multi-unit buildings, where the stakes are closures and tenant complaints rather than one wet floor. They also explain how commercial work differs from a home visit, and what building owners should ask for.

What do the gas line guides cover?

The gas guides cover natural gas piping and the earthquake valve. Gas work is the clearest case where the law, not your skill, decides who may do the job. These pages explain what a plumber does, what needs a permit and what to do if you smell gas.

What do the faucet, fixture and water softener guides cover?

These guides cover the visible fixtures: faucets that drip, showers that leak at the valve and the scale that hard water leaves behind. Most faucet repairs are a washer, cartridge or O-ring. Softener pages cover whether one is worth installing.

What do the cost guides cover?

The cost guides give published price ranges for Los Angeles jobs and say what pushes a price up or down. Treat every figure as a guide: the real price is the written quote from the plumber who sees your job.

How do I choose and check a plumber?

These pages cover what to ask, what to check and what the words mean. In California a plumbing contractor holds a license from the Contractors State License Board, and you can look a number up on the board's site before anyone starts work.

For how the service itself works, see how a job runs.

Common questions

How do I know whether to fix a plumbing problem myself?

Fix it yourself when the repair is above the wall and involves no gas: a washer, a flapper, a trap, an aerator. Call a plumber when the work is behind the wall, involves gas piping, needs a permit like a water heater swap, or the same fault returns. Each guide says which side of that line its job is on.

Are the prices in these guides what I will pay?

No. They are ranges drawn from published sources and they move with the market. Los Angeles labor often runs above national averages. The figure that counts is the written quote a local plumber gives after seeing your job. The quote form is how you ask for one.

What should I do first if I smell gas?

Leave the building, take everyone with you and do not switch lights or devices on or off inside. From outside, call SoCalGas at 1-800-427-2200, or 911 if there is danger. Gas work, including repairs afterwards, must be done by a licensed contractor with the right permit. The gas guides explain more.

Do you cover my part of Los Angeles?

The service covers the City of Los Angeles. The areas page lists the neighborhoods with their own pages, and the quote form accepts any address in the city. If you are unsure whether yours is inside the City of Los Angeles, ask when you send the request.

Who writes these guides?

They are written for City of Angels Plumbing and checked against official sources such as the California Contractors State License Board, LADBS, LADWP and SoCalGas. Sources are listed at the foot of each page. If a fact could not be checked, the page says less rather than guess.

Guides in this section

  • 1/2 inch flexible gas line

    What a 1/2 inch flexible gas line is, where it is allowed, which pipe types carry natural gas in Los Angeles, burial depth, mobile homes…

  • Anode rod replacement

    Anode rod water heater replacement in Los Angeles: what the rod does, how to tell when it is spent, which type to choose and what a…

  • Apartment building no hot

    No hot water in your Los Angeles apartment building?

  • Backflow testing services

    Backflow testing services in Los Angeles: who may test, how often LADWP requires it, what a test costs, and how to book one for your…

  • Bathroom sink low pressure

    Weak flow at a bathroom faucet is often a tiny aerator or a flow limit, not a plumbing fault.

  • Finding a rated plumber

    How to judge a best rated plumber in Los Angeles: read reviews properly, check the CSLB license and contract terms, and what to expect on…

  • Water pressure and valves

    Best showerhead for low water pressure: what to look for under California's 1.8 gpm limit, how to clean a clogged head, and when the pipes…

  • Burst water pipe

    A burst water pipe in your Los Angeles home: the first ten minutes, who can shut off the water, drying rules and when to call a plumber.

  • Ceiling water leak

    Water coming through your ceiling: stop it, find the source, dry it within 48 hours, deal with mold and know when to call a plumber in Los…

  • Prevention and maintenance

    Commercial maintenance plumber in Los Angeles: what a plumbing maintenance plan covers, how often to service your building, and what it…

  • Cost of replacing plumbing

    What it costs to replace the plumbing in an old Los Angeles house: repipe ranges by material, drain work, wall repair, permits and how to…

  • Leaks and burst pipes

    Does homeowners insurance cover a burst pipe in California?

  • Galvanized pipe replacement

    Galvanized pipe replacement in Los Angeles: how to spot the pipe, why it fails, what replacing it costs and what a permit and inspection…

  • Hot water pressure low

    Low pressure on the hot side only? Find out whether it is the water heater, a clogged line or the whole house, and what a Los Angeles…

  • Leaky shower faucet

    Shower still dripping after you turn it off?

  • Leaky bathtub faucet

    A dripping tub spout or leaking handle usually means a worn cartridge, washer or diverter.

  • How to fix a leaky faucet

    Four faucet designs, four fixes. Identify your faucet, gather the parts and stop the drip at the spout, handle or base, with Los Angeles…

  • Plumber hourly rate

    Plumber hourly rates in Los Angeles: a sourced range, what the rate includes, flat-rate versus hourly, per-square-foot figures, a price…

  • Drain cleaning and clogs

    Bathtub full of standing water and hair? Step-by-step ways to drain a clogged tub, clear a stopper, plunge it right, and when to call a…

  • Leaks and burst pipes

    How to fix a leaking pipe joint by type: threaded, soldered copper, PVC and compression.

  • Leaky outdoor faucet

    Outdoor faucet dripping at the spout, the handle or the wall?

  • Leaky kitchen sink faucet

    Kitchen faucet dripping from the spout, handle or base?

  • Water pressure and valves

    How to fix low water pressure in a house: a step-by-step check of valves, aerators, the regulator and pipes, plus when a Los Angeles…

  • Drain cleaning and clogs

    A kitchen sink draining slowly? How to fix it: clear the trap, plunge it right, deal with the disposal, and know when to call a Los…

  • Sewer lines

    How to get rid of sewer smell in your house: fill dry traps, check the toilet seal and vents, and know when a Los Angeles plumber needs to…

  • Leaks and burst pipes

    How to know if a pipe burst: the sounds, stains and meter readings that give it away, how to check under the house, and what to do next in…

  • Drain cleaning and clogs

    Blocked toilet and the bowl is rising? Stop the overflow, plunge correctly, use a closet auger, and know when to call a Los Angeles plumber.

  • Faucets, sinks, showers and disposals

    Fix a leaking pipe under the sink: find the joint, tighten or replace the washer, and know when a burst pipe or supply line means calling…

  • Toilets

    How to repair a loose toilet seat: tighten the bolts, add washers, replace worn hardware, and tell a wobbly seat from a toilet that rocks…

  • Leaks and burst pipes

    Pinhole leak in a copper pipe: how to stop it for now, why it happened, how to find hidden leaks and dry the ceiling, and when a plumber…

  • Toilets

    How to repair a running toilet in Los Angeles: find the worn part in the tank, fix it in an order that works, and know when a local…

  • Water heaters

    How to repair water heater leakage: find where it comes from, which leaks are fixable, how to drain the tank safely, and when a Los…

  • How to repipe with PEX

    How a house is repiped with PEX, step by step, what a Los Angeles permit requires and whether a homeowner should try it or call a local…

  • Drain cleaning and clogs

    How to unclog a kitchen sink with standing water: plunge, clear the P-trap, use a snake, handle double basins and disposals, and know when…

  • Drain cleaning and clogs

    Bathroom sink clogged with hair? Pull the stopper, use a drain claw, clear the P-trap, and learn when standing water means a Los Angeles…

  • Drain cleaning and clogs

    Dishwasher full of dirty water? How to unclog a dishwasher drain: filter, hose, disposal, air gap, and when to call a Los Angeles plumber.

  • Shower and tub drains

    How to unclog a shower drain yourself with a hook, a plunger and hot water, what to do with standing water, and when a Los Angeles plumber…

  • Drain cleaning and clogs

    How to unclog a garbage disposal drain: tell a jam from a clog, free it safely with a hex key, reset it, and know when to call a Los…

  • Drain cleaning and clogs

    How to unclog a washing machine drain in a Los Angeles home: clear the hose, the standpipe and the trap, and know when a backup means a…

  • Water softeners and treatment

    Thinking of installing a water softener yourself in Los Angeles?

  • Installation tankless hot water heater

    How a tankless hot water heater installation works in Los Angeles: gas, electric, venting, code and permit steps, and what to check before…

  • Installation tankless water heater

    Tankless water heater installation cost in Los Angeles: price ranges for gas and electric, the extras that move the total, and how it…

  • Instant water heater repair

    Instant water heater repair in Los Angeles: what error codes, cold bursts and weak flow usually mean, a safe descale, and when a plumber…

  • PEX A or B

    Is PEX A or B better for a repipe? Both meet the same standard.

  • Leaking water pipe repair

    A water pipe is leaking: what to do under the house, in the yard or in a wall, whether sealants work, who pays and when to call a plumber.

  • New construction plumbing

    New construction plumbing in Los Angeles: the stages from underground to final, LADBS inspections, typical cost per square foot and…

  • PEX repipe cost

    PEX repipe cost in Los Angeles: price ranges for a whole house, a 2-bath home, a mobile home and polybutylene swaps, plus how PEX compares…

  • Plumber business

    Looking for a plumber business near you in Los Angeles?

  • Plumber cost to unclog

    What a plumber costs to unclog a sink in Los Angeles: typical price ranges, what pushes the quote up, and what to ask before the work…

  • Plumber for sewer smell

    Plumber for sewer smell in Los Angeles: the signs of a broken sewer line, what a plumber checks with a camera, who owns which pipe, and…

  • Plumber for shower leak

    Shower leaking, a burst shower pipe or a stain on the ceiling below?

  • Plumber for toilet leak

    Plumber for a toilet leak in Los Angeles: find where it leaks, what to shut off, what a plumber fixes at the base, tank or supply line,…

  • Plumber for water heater leak

    Water heater leaking in Los Angeles? Shut it off safely, work out where the water is coming from, and learn which leaks are repairs and…

  • Plumber for water heater

    How to choose a plumber for water heater replacement in Los Angeles: license checks, what a quote should list, the permit and what the day…

  • Plumber leak detection cost

    What leak detection and leak repair cost: ranges for finding a leak, fixing pipe, outdoor lines and slab leaks, and what moves the price…

  • Plumber service call cost

    What a plumber service call costs in Los Angeles, what the fee covers, when it is credited toward the repair, and the questions to ask…

  • Plumbing for bathroom remodel

    What plumbing a bathroom remodel needs in Los Angeles: permits, fixture rules, valves, drain moves and what each step costs, before you…

  • Plumbing permit for water

    Do you need a plumbing permit to replace a water heater in Los Angeles?

  • Polybutylene pipe replacement

    Polybutylene pipe replacement in Los Angeles: how to spot gray or blue PB pipe, why it fails, insurance trouble, permits and what a repipe…

  • Removing hard water scale

    How to remove hard water scale from faucets, glass, showerheads and water heaters in Los Angeles, what cannot be removed, and how to stop…

  • Repair a toilet fill

    Repair a toilet fill valve: adjust, clean or replace it, what a running toilet does to your water bill, and what a Los Angeles plumber…

  • Repair copper pipe leak

    Repair a copper pipe leak: clamps, push-fit and soldered fixes compared, whether epoxy or JB Weld holds, and when to hand it to a plumber.

  • Repair gas water heater

    Gas water heater not heating or the pilot keeps going out?

  • Repair toilet leak

    Repair a toilet leak by symptom: tank, bowl, base or supply line.

  • Repair toilet overflow tube

    Repair a toilet overflow tube: what it does, why water runs into it, how to set the water level and refill tube, and when the flush valve…

  • Rheem electric water heater

    Rheem electric water heater not heating? Breaker, reset button, elements and thermostats explained, with safety limits and when to call a…

  • Drain smells and slow drains

    A shower drain that smells usually has hair and soap film on the pipe wall or a dry trap.

  • Shower no hot water

    Shower no hot water in Los Angeles: run the sink test to tell a water heater fault from a shower valve problem, then see the fixes and…

  • Shower water pressure

    Shower pressure weak? Clean the showerhead, check valves and the pressure regulator, and know what California's 1.8 gpm rule means.

  • Slab leak repair company

    How to choose a slab leak repair company in Los Angeles: signs, detection, repair methods, permits and the questions to ask before work…

  • Thermocouple replacement

    Thermocouple water heater replacement in Los Angeles: how the part keeps a gas heater safe, signs it has failed, what it costs and when to…

  • Toilet flapper repair

    Toilet flapper repair: test for a leaking flapper, pick the right type, fix the chain, and know what a Los Angeles plumber charges to…

  • Toilet flush repair

    Toilet flush repair for Los Angeles homes: fix a loose handle, a worn flush valve or a sticking float, and see when the tank needs to come…

  • Toilet keep running

    Toilet keeps running in Los Angeles? Match the sound and symptom to the cause, see what is safe to do yourself, and learn when to have a…

  • Toilet repair shut off

    Toilet shut off valve repair: why the valve under your toilet leaks or will not turn, what to try, what replacing it costs, and when to…

  • Washing machine no hot

    Washer or dishwasher not getting hot water?

  • Water hammer sound

    Banging pipes when a faucet shuts off? What causes water hammer in Los Angeles homes, what you can fix yourself, what it costs, and when…

  • Water heater anode rod

    Anode rod replacement usually costs a few hundred dollars, and the same table covers elements, thermostats, expansion tanks and other…

  • Water heater expansion tank

    Dripping relief valve or banging pipes? How a water heater expansion tank works, signs it has failed, what a replacement costs and what…

  • Water heater pilot light

    Pilot light out, or lit but no hot water?

  • Relief valve replacement

    Water heater relief valve replacement in Los Angeles: how to test the valve, signs it has failed, why one drips and what the discharge…

  • Low pressure at the kitchen sink

    Weak flow at one kitchen faucet? A step-by-step way to find the cause in a Los Angeles home, from a clogged aerator to a failing supply…

  • Water pressure and valves

    Water pressure regulator in Los Angeles: when the 80 psi code rule applies, what psi to set, signs it is failing, and when to call a…

  • Water spots on ceiling

    Water stain on the ceiling and nothing is dripping?

  • Leaks and burst pipes

    What causes a pipe to burst, in winter and in summer: freezing, high pressure, corrosion, age and ground movement, plus how to prevent it…

  • Whole-house water softener installation

    What a whole-house water softener installation involves in Los Angeles homes, where it goes, the drain and permit rules, and when…

  • Water heaters

    No hot water at home in Los Angeles? Check the breaker, pilot light, thermostat and one-tap faults first, then see when to call a plumber…

  • Water pressure and valves

    Why is my water pressure low? The usual causes in Los Angeles homes, from valves and regulators to scaled galvanized pipe, hills and…

  • Why repipe a house

    Why repipe a house in Los Angeles: the warning signs, the pipe materials that fail, how often a house needs it and when a repair is enough.

  • High water bill

    Why is my water bill so high? Check the meter, toilets, irrigation and softener, learn what LADWP reviews automatically, and when to call…

  • Winterize mobile home plumbing

    How to winterize mobile home plumbing in Los Angeles: insulation, skirting, vents, valves, heat tape and drain-down, plus when a plumber…

References

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