01
A hose bib or stable line that has split
Barns, bibs & outbuildings
Stable lines, tack room sinks, hose bibs, and the outdoor fittings that split during a cold week in January.
Agoura Hills · Pressure regulators
Water pressure regulators
in Agoura Hills
Water pressure regulators in Agoura Hills, seven minutes from the shop in Westlake Village. The water comes into the Conejo Valley from tanks on the hills, so on a lot of streets it arrives well above the 80 psi the code allows inside a house. The regulator is the part that protects everything after it.
Call (805) 330-3111
Request a visit
Danny picks up when he can, and calls back the same day. You get the price before we start, and nobody here is on commission. Monday to Friday, 9am – 5pm.
Licensed
CSLB #339618
Insured
Bonded and insured
Since 1977
49 years, two generations
On Google
5.0 stars
In Agoura Hills
What this job looks like
in Agoura Hills
In Agoura Hills the regulator is the part people notice last. South of the freeway, in Morrison Ranch and Liberty Canyon, these are seventies and eighties slab houses where the regulator at the front hose bib was set once and has been quietly giving up for years. What shows is a run of failures: toilet fill valves, angle stops, faucet cartridges, a relief valve dripping at the water heater. A gauge on the hose bib reads it in a minute, and over 80 psi means the regulator is done. Replacement is a few hours, and the heater gets an expansion tank with it.
Streets and pockets we work in: Old Agoura, Morrison Ranch, Liberty Canyon, Lake Lindero, Chesebro, Fountainwood.
If that is what yours is doing (805) 330-3111 Mon–Fri 9–5 Request a visit →
The job
How it goes
A pressure regulator is a valve on the main line where it enters the house, usually near the front hose bib. It takes street pressure, which here can be 100 psi and more, and holds the house at 50 to 70. They last ten to fifteen years. When one fails it fails quietly: the pressure creeps up, and the first sign is that things start breaking. Toilet fill valves, angle stops, faucet cartridges, the washing machine hoses, the relief valve on the water heater. People replace those one at a time for years without knowing why.
The test takes a minute. A gauge on a hose bib reads the pressure, and if it is over 80, or if it swings when a fixture shuts, the regulator is done. Replacement is a few hours: the old valve comes out, a new one goes in with unions so the next one is easier, and we set it to what the house wants and check it at a tap. If the water heater has no expansion tank, it gets one at the same time, because a regulator with no expansion tank is what makes the relief valve drip.
We check the pressure at every house we work in. It is the single most useful thing to know about a house in this valley, and a working regulator is the cheapest insurance the plumbing has.
Call if
What you notice,
and what it usually is
01
Fixtures keep failing, one after another
Pressure. The regulator is gone and everything downstream is taking it.
02
Banging pipes when a valve shuts
Water hammer, and pressure makes it worse. The regulator is the first thing to check.
03
The water heater relief valve drips
No expansion tank, or a failed regulator, or both.
04
The shower blasts, then fades
A regulator hunting. It is on its way out.
05
Your house has never had one
Some do not. A gauge on the hose bib says whether it needs one.
Work in Agoura Hills
From the invoice book,
names left off
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February 2026
Three new toilets in a morning
Set three owner-supplied toilets with new wax seals and supply lines, and snaked the kids' shower on the way out.
-
June 2024
A condensate line with nowhere to go
Rerouted the air conditioner's condensate drain out to the front of the garage so it stopped draining where it should not.
How it goes
Four steps, and you have the price at step three
-
01
You call
Danny picks up when he can, and calls back the same day. Tell him what it is doing and where.
-
02
We look
We come out, find the cause and show you. In plain words, with the part in our hand where there is one.
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03
You get a price
Before anything starts. Repairs are our time plus parts, and the bigger jobs get a written bid. Nobody here is on commission.
-
04
We do the work
Small repairs are usually done the same visit. Bigger jobs get a start date and a number of days, and we hold to it. Done to code, permitted where it needs it, the house left the way we found it.
Common questions
Pressure regulators in Agoura Hills: things people ask
- How fast can you get to Agoura Hills?
- Usually the same day. It is seven minutes down the 101 from Westlake Village. Say what it is doing when you call and Danny will tell you when.
- Who pulls the permit in Agoura Hills?
- We do, through the City of Agoura Hills, for water heaters, gas lines, repipes and remodel plumbing. The inspection is part of the price.
- What should my water pressure be?
- Between 50 and 70 psi inside the house. Code allows up to 80. Above that, fixtures are outside what they were built for and the warranties on most of them are void.
- Where is my regulator?
- Almost always on the main line as it enters the house, near the front hose bib or the main shutoff. It is a bell-shaped brass valve with an adjusting screw on top.
- Can I test the pressure myself?
- Yes. A gauge that screws onto a hose bib costs about ten dollars at a hardware store. Read it with everything off, then with a tap running. Over 80, or a big swing between the two, and it is time.
A question that is not here (805) 330-3111 Mon–Fri 9–5 Request a visit →
Google reviews
What people say
5.0 ★★★★★ 5 reviews on Google
★★★★★
“Dan is consistent. Professional, on time, only does what is needed, experienced, easy to work with, clean, and smart.”
★★★★★
“Dan's Plumbing did excellent job for us replacing our broken water pressure regulator. Quick response, good price, great quality of work. Will hire them again.”
2 of the 5, word for word. Read the rest on Google → Had us out? Leave a review →
Nearby, and related
More in Agoura Hills,
and this job elsewhere
- Plumber in Agoura Hills The whole town: what the houses are plumbed with, what people call about, the neighborhoods.
- Leak detection in Agoura Hills Agoura Hills is two kinds of leak. South of the freeway, in Morrison Ranch and Liberty Canyon, it is slab houses from the seventies and eighties with copper in the concrete. North of it, in Old Agoura, it is long private water lines across acre lots, where a leak shows up as a wet patch a long way from the fault. Either way we locate first, from the surface, before anything is dug or cut.
- Slab leaks in Agoura Hills The slab leak we found under an Agoura Hills bedroom closet in November 2023 is the typical one: a pinhole in a one-inch copper line under a seventies house, marked by the locator we work with along with the post-tensioned cables, opened at one spot and replaced. Morrison Ranch and Liberty Canyon are the right age for it, and a second leak on the same line is when a reroute makes more sense than another hole.
- Water heaters in Agoura Hills Water heater replacements in Agoura Hills go through the City of Agoura Hills for the permit, and most of the heaters sit in a garage that gets hot in summer, which shortens a tank's life. We replace tanks with strapping and an expansion tank, take the old one away, and do tankless conversions where the gas line can be sized for it.
- Drain cleaning in Agoura Hills Some Old Agoura parcels are on septic, with no sewer main, so the first useful thing to know when everything drains slowly at once is which side of the tank the problem is on. We clear the line and camera it to the tank, and tell you plainly if the tank is the problem. In the tracts south of the freeway it is the usual grease, hair and roots at the joints.
- Sewer camera & repair in Agoura Hills On an Old Agoura lot the sewer lateral can run a few hundred feet, and a wet patch in the yard is often nowhere near the fault.
- Repiping in Agoura Hills Morrison Ranch and Liberty Canyon houses are at the age where a repipe comes up: original copper in the slab that has leaked more than once.
- Repairs in Agoura Hills Agoura Hills gives us both kinds of small job. In the tracts south of the freeway it is the ordinary list: toilets, faucets, disposals, angle stops, shower valves, and the truck carries those parts, so it is usually one visit. In February 2026 we set three owner-supplied toilets here in a morning, with new wax seals and supply lines, and snaked the kids' shower on the way out. North of the freeway, in Old Agoura, it runs more to hose bibs, stable lines and tack room sinks, and the outdoor fittings that split during a cold week in January. You get the price before we start.
- Tankless in Agoura Hills Tankless conversions in Agoura Hills start at the gas meter. A tank draws about 40,000 BTU and a whole-house tankless wants 150,000 or more, so the line from the meter usually has to be upsized, and the venting changes with the unit. Most heaters here sit in a garage that gets hot in summer, which is hard on a tank. Las Virgenes supplies the water and it is hard, so the heat exchanger scales and wants a descale once a year. The isolation valves we fit keep that to about half an hour. Permit and inspection through the City of Agoura Hills.
- Gas lines in Agoura Hills Gas lines in Agoura Hills are permitted and inspected through the City of Agoura Hills, and every line is tested under pressure before the gas goes back on. If you smell gas, leave the house and call SoCalGas from outside first. The repair is ours after that. Most of the work is new runs: a built-in BBQ or an outdoor kitchen, a fire pit, a pool heater, a range, a dryer. Each is sized by the appliance and the length of the run, which on an Old Agoura lot can be a long way from the meter. Upsizing for a tankless is the other half.
Pressure regulators nearby: Westlake Village · Thousand Oaks · Oak Park · Lake Sherwood
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Pressure regulators · Agoura Hills
Tell Danny what
it’s doing
Describe the symptom and you will usually have an answer in two minutes. You get the price before any work starts. Seven minutes from the shop. Monday to Friday, 9am – 5pm.