South shore of Lake Travis, on RR 620

Plumber in Lakeway, TX

Lakeway climbs from Lake Travis up limestone hills, and many of its 1970s and 1980s homes live with water pressure their original plumbing never expected. Alta Vista Plumbing comes down RR 620 from Georgetown, at the outer edge of our 25 to 55 minute range. We handle PRVs, repipes, tankless heaters and leak detection.

Call (512) 988-5119 All areas we serve

4.7 on Google · 436 reviews
Georgetown plumbing since 1999
Family-owned
Homes and businesses

Hillside home and sun-browned lawn above Lake Travis in late summer in Lakeway TX

The houses and the hills

Lake Travis resort homes from the 1960s on, and pressure to match

A ranch that became a resort, then a city of hillside homes.

Lakeway began on a 2,700-acre ranch. Lots went on sale on May 30, 1963, the Lakeway Inn and Marina opened that July, and by 1971 there were about 300 homes on 1,000 developed acres. Owners voted to incorporate in July 1974, with the consent of the City of Austin.

The city describes its start as a retirement and second-home community, and that first wave of housing is now 40 to 50 years old. Homes plumbed from 1978 to 1995 fall inside the polybutylene window. The population climbed from 4,044 in 1990 to 19,189 in 2020.

Dial gauge showing high static water pressure at a hose bib in Lakeway TX — A static reading above 80 psi means the house needs a working PRV.

Hills mean pressure. A system that can push water up to the hilltop houses delivers much more at the lower lots. The International Residential Code caps static pressure in a home at 80 psi and calls for a pressure-reducing valve at the service entry wherever the main runs higher.

The same code asks for thermal expansion control once that valve is in. Without it, pressure spikes each time the heater fires. Relief valves weep, toilet fill valves hiss, washer hoses balloon, and the oldest polybutylene or copper joints give way first. A gauge on a hose bib shows within minutes whether pressure is behind it.

Thermal expansion tank installed above a water heater in Lakeway TX — An expansion tank stops pressure spikes once a PRV closes the system.

Local knowledge

RR 620, Lakeway MUD and the new Rough Hollow customers

Roads, the water district and the jobs we see most on the south shore.

RR 620 is the spine, crossing Mansfield Dam five miles east and running north toward Cedar Park and Round Rock. The city sits on the south shore about 25 miles west of downtown Austin, with golf courses, marinas, a private airport and nearly 500 acres of greenbelt.

Lakeway MUD has supplied water and wastewater since 1972. On August 17, 2026 it took over Travis County MUDs 11, 12 and 13, adding about 4,800 customers in Rough Hollow and The Highlands. Its free WaterSmart account shows hourly use, a quick way to catch a leak.

Automatic sprinklers are barred from 10 a.m. to 7 p.m., and homes on grinder pumps call the MUD for service on those units. Our own calls run to PRVs past their prime, repipes in 1970s houses, tankless heaters needing a flush and leaks spotted first on a usage graph.

New PEX manifold during a whole-house repipe of a 1980s home in Lakeway TX — Repipes in 1970s and 1980s homes start at a new manifold and shut-off.

Services

PRVs, repipes and tankless work for hillside lake homes

What the hills, the house ages and the water district bring us out for most.

Plumbing Services

Lower lots on these hills often see static pressure above the 80 psi code limit. We gauge it at a hose bib, install or replace the PRV and add an expansion tank so the heater stops spiking it.

Whole-House Repiping

Many 1970s and 1980s houses here are due for new pipe, and some carry polybutylene. We repipe in PEX or copper, with a fresh PRV and shut-off at the service entry.

Tankless Water Heaters

Tankless units are common in remodeled and newer homes along the shore. We install, flush and repair them, set up isolation valves for service and check the pressure feeding them.

Water Leak Detection

High pressure finds weak joints inside walls, under slabs and beneath decks on sloped lots. A WaterSmart usage spike is a good reason to call, and we trace the leak before opening anything.

Water Heater Repair & Replacement

A tank heater with a weeping relief valve is often reacting to unchecked thermal expansion. We fix the cause first, then repair or replace the gas or electric tank if it has failed.

Slab Leak Detection & Repair

Slab homes cut into the limestone slopes can hide leaks under tile for weeks. We locate the leak, then explain a spot repair against rerouting the line through the attic.

Drain & Sewer Cleaning

Wipes and grease are hard on grinder pumps and the lines that feed them. We clear house drains and mains, and tell you when the pump itself is a call for the MUD.

Reviews

Heater options and leak repairs, in customers’ words

4.7 average from 436 Google reviewsRead our Google reviews

Vicky BGoogle review, about 5 years before Oct 2026

Alta Vista was the third plumbing company that I called to get an estimate to have a new water heater installed. I wasn’t satisfied with the first two plumbers that came out to provide an estimate so I continued to look for another plumber which is when I found Alta Vista. When I spoke to Steve, the owner of Alta Vista, I was impressed by his friendliness and availability to come out to provide an estimate. I was hoping that I had finally found a plumber who was honest, trustworthy and would do quality work. When Steve came out to provide me with an estimate, he was super nice, patient in answering my questions and knowledgeable. Steve provided me with a couple of options for water heaters and took his time explaining them to me. His quote was also very reasonable. I decided to give my business to Alta Vista. When he and his crew arrived to remove our old water heater and install the new, they were all very friendly, polite and professional. Jared did the actual install of the new water heater, and he was very accommodating, easy to talk with and did a great job. I’m so glad to have found an honest, trustworthy and knowledgeable plumber in the Georgetown area. I will definitely use Alta Vista for future plumbing issues and will not hesitate to recommend them to friends and family members.

Pauline AlbaGoogle review, about 5 years before Oct 2026

After having a new faucet installed. I noticed a small leak in one of the pipes underneath kitchen sink. Reached back out to AVP and explained the situation. They set an appointment for Lydia to check it out and fix. I was pleased with Lydia’s help in getting the leak fixed and double checking that it was good to go. My first experience using AVP. Thank you Lydia!

Reply from Alta Vista Plumbing

This is great to hear! I will be sure to share this positive review with Lydia! We appreciate your business and hope to assist you in the future!

Map & nearby areas

Across Lake Travis and up RR 620

Lakeway is the far southwest corner of the area we drive to from Georgetown.

Map of Lakeway, TX and the surrounding area

Get directions

Lago Vista

Across the lake on the north shore, with steep lots and worn PRVs.

Jonestown

North shore on RM 1431, with hillside septic homes.

Cedar Park

Up RR 620, with polybutylene-era 1980s subdivisions.

Austin

East toward the city, with 1970s–80s slab homes and older cast iron.

Round Rock

At the north end of RR 620, with 1970s–80s neighborhoods due for repipes.

Every area we serve, by tier · How to Fix or Prevent Common Tankless Water Heater Problems · Whole-House Repipe Cost: PEX vs. Copper for 1970s–90s Homes

FAQ

Pressure, repipe and tankless questions near Lake Travis

How high is too high for water pressure in a Lakeway home?

Anything above 80 psi of static pressure. That is the limit in the International Residential Code, which calls for a pressure-reducing valve where the main runs higher. Lower lots on hilly Lakeway streets can exceed it. We test at a hose bib with every fixture off, then set the valve comfortably below the limit and add expansion control.

Does a 1970s or 1980s house here need a full repipe?

Yes, if it has polybutylene or leaks keep coming back. Lots here have sold since 1963, so the oldest supply lines are past 50 years, and high pressure speeds their failure. If the pipe is copper in good shape, a PRV and targeted repairs may be enough. We look at the whole system and quote both options on site.

Can a tankless water heater handle high pressure on a hillside lot?

Yes, as long as the house pressure is controlled. Tankless units can last 20 years or more, but spikes above the code limit wear valves and fittings. Hillside homes here should have a working PRV ahead of the heater and isolation valves for flushing. We check both when we install or service a unit.

Pressure, leak or heater trouble in Lakeway?

Call (512) 988-5119 and tell us what you are hearing or seeing. We explain the options and quote on site before any work starts.

Call (512) 988-5119 Get directions on Google

4.7 on Google · 436 reviews
Georgetown plumbing since 1999
Family-owned
Homes and businesses

Alta Vista Plumbing Services, LLCGeorgetown, TX 78628(512) 988-5119