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Things that go drip in the night: (805) 330-3111
Dan’s Plumbing Est. 1977 · Westlake Village Call Dan (805) 330-3111 Request a visit

Oak Park · Tankless

Tankless water heaters
in Oak Park

Tankless water heaters in Oak Park, ten minutes from the shop in Westlake Village. A tankless fires at four or five times the rate of a tank. With the gas line and venting done right, it runs twenty years.

Call (805) 330-3111 Request a visit

Dan picks up when he can and calls back the same day. You get the price before we start. Monday to Friday, 9am – 5pm.

Licensed CSLB #339618
Insured Bonded and insured
Since 1977 49 years, two generations
On Google 5.0 stars
From the shop Ten minutes
Permits Ventura County. Oak Park is unincorporated.
Guarantee One year on our labor. Thirty days on drain clearing.
ZIP codes 91377

Around here

In Oak Park

Ventura County permits and inspects tankless conversions in Oak Park, since there's no city hall, and we plan the job around its inspection schedule. The gas line gets upsized from the meter for a whole-house unit, and the vent and condensate drain are run to suit it. Isolation valves go on so the yearly descale the hard water calls for is a short visit.

Neighborhoods: the Kanan tracts, Lindero Canyon, the streets off Oak Hills Drive, Sutton Valley, the newer tracts up Bowfield.

01

Cold showers, or a puddle in the garage

Water heater replacement

Tank swap or tankless conversion, with the venting, gas sizing and county permit handled.

Call about any of these (805) 330-3111 Mon–Fri 9–5 Request a visit →

The job

How it goes

A standard tank draws about 40,000 BTU and a whole-house tankless draws 150,000 to 199,000, which the old half-inch line often can't carry. We upsize it from the meter, and sometimes the gas company upgrades the meter. Condensing units vent in PVC with a condensate drain, and non-condensing units need stainless vent.

We size by how many fixtures run at once and the incoming water temperature, around 55 degrees here in winter. Undersizing is the mistake we see most.

Our hard water scales the heat exchanger, so a tankless needs descaling once a year. The isolation valves we fit make that a half-hour job, on our installs or anyone's.

Call if

What you notice,
and what it usually is

01

Your tank is due for replacement

A tankless lasts about twice as long.

02

Hot water runs out with a full house

Sized right, a tankless won't run out.

03

No room in the closet for a bigger tank

A tankless the size of a carry-on hangs on the wall.

04

A long wait for hot water at the far bathroom

A recirculation loop fixes it, with or without a tankless.

05

Your tankless runs weak or lukewarm

Scale. A descale usually brings it back.

Four steps

How a job goes

  1. 01

    You call

    Dan picks up when he can and calls back the same day. Tell him what it's doing.

  2. 02

    We look

    We come out, find the cause and show you, with the old part in hand when there is one.

  3. 03

    You get a price

    Before anything starts. Repairs are time plus parts. Bigger jobs get a written bid.

  4. 04

    We do the work

    Small repairs usually get done the same visit. Bigger jobs get a start date we keep. Permitted where needed, and the house left clean.

Common questions

Tankless in Oak Park: things people ask

How fast can you get to Oak Park?
Often the same day. It's ten minutes up Kanan or Lindero Canyon from Westlake Village.
Who issues permits in Oak Park?
Ventura County, since Oak Park has no city government. We plan around the county's inspection schedule, so the date we give you holds.
Does the hot water ever run out?
Not within its flow rate. Two showers at once is fine if it's sized right. Four is too much for any unit.
Will it cut my gas bill?
Some, since it heats only what you use. People switch for the space, the longer life and never running out.
Can my existing gas line handle it?
Usually not without changes. We size the line from the meter and tell you what has to change before you commit.

Other questions (805) 330-3111 Mon–Fri 9–5 Request a visit →

Google reviews

What people say

5.0 ★★★★★ 8 reviews on Google

Dan standing in front of his white work truck, smiling.

★★★★★

“Outstanding work! Did a terrific job of diagnosing the issue over the phone prior to repair. Plumber was on time and on point. Work was done quickly and thoroughly. Figured out the most straightforward way to fix the problem and got it done. Small footprint, quick results, up and running in no time. Would absolutely recommend.”

David Loomstein · September 2026

★★★★★

“The absolute best plumber in Los Angeles!”

Neil D. · September 2026

Nearby

More in Oak Park

Tankless nearby: Westlake Village · Thousand Oaks · Agoura Hills · Lake Sherwood

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Leave your details and Dan will call you back

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Tankless · Oak Park

Tell Dan what
it’s doing

Most problems get sorted out on a short call. Ten minutes from the shop. Monday to Friday, 9am – 5pm.

Dan picks up

(805) 330-3111 Send Dan the details

Find us

Dan's Plumbing

2352 Hillsbury Rd
Westlake Village, CA 91361

(805) 330-3111 · Monday to Friday, 9am – 5pm

Serving Westlake Village, Thousand Oaks, Agoura Hills, Oak Park and Lake Sherwood. Zip codes 91361, 91362, 91301, 91377.

Call Dan (805) 330-3111