Plumber in Great Falls, VA

Great Falls sits just northwest of McLean, between the Potomac River and Route 7. It is a census-designated place in Fairfax County known for wooded lots, horse properties and Great Falls Park. Homes here are spread out, and many were built on large parcels with their own wells and septic systems. That makes plumbing here different from the closer-in suburbs. We bring the same leak detection and repair work we offer as a plumber in McLean, adapted to rural-style systems.

Why plumbing in Great Falls is different

Great Falls developed slowly, with large lots along Georgetown Pike, Walker Road and the stream valleys of Difficult Run. Public water and sewer do not reach every street. Fairfax County's health department oversees private wells under its Private Well Water Ordinance and recommends yearly well water testing.

Housing ranges from 1960s and 1970s colonials and contemporaries to large newer custom homes. Many have long driveways, outbuildings, pools and irrigation systems. That adds hundreds of feet of buried pipe where a leak can hide. A house on a well also has no water meter to read, so a leak often shows up as a pump that runs too often rather than a higher bill.

Common plumbing problems in Great Falls

Tips for Great Falls homeowners

• Know your system. Find your well's pressure tank, pressure switch and main shutoff before you need them.
• Watch the pump. A pump that runs when no one is using water usually means a leak or a failing tank.
• Test your water every year. Fairfax County recommends it for all private wells.
• Winterize outbuildings. Shut off and drain lines to barns, pool houses and garden spigots before hard freezes.
• Mark your lines. Note where the water line, irrigation and pool lines run. It makes leak location faster.

Well, septic and public water

Some Great Falls homes are on Fairfax Water, some are on private wells, and many use septic systems instead of public sewer. If you are on public water, Fairfax County says you are responsible for the water line into the house starting from the street lateral. If you are on a well, you are responsible for your water's safety and the full system. For well components, the county advises calling a licensed well contractor. We handle the plumbing in the house and help you sort out which kind of contractor a problem needs.

Planning a renovation or new build in Great Falls

Large renovations and new homes often add bathrooms, pools and irrigation to a well or a long service line that was sized decades ago. Before you add fixtures, check that the well's flow, pump and pressure tank can keep up, or that the service line is large enough. Planning that early avoids low pressure in the new bathrooms after you move in.

Great Falls plumbing questions

Do you cover all of Great Falls?

Yes. We serve all of ZIP code 22066, including homes along Georgetown Pike, Walker Road, Seneca Road, Springvale Road and the neighborhoods near Great Falls Park and the Great Falls Village Centre.

Do you work on private well systems?

Yes. We diagnose no-water and low-pressure problems, pressure switches and pressure tanks. When the pump or well must be pulled, we explain why and coordinate with a licensed well contractor, as Fairfax County advises.

How often should a Great Falls well be tested?

Fairfax County's health department recommends testing private well water every year for bacteriological and chemical contaminants and checking the system regularly for mechanical problems.

Can you find a leak on a long water line?

Yes. Long service lines and irrigation runs are common on Great Falls lots. We isolate sections with pressure tests and use acoustic listening and tracer gas to pinpoint the leak before digging.

Do you fix septic systems?

We handle plumbing inside the house and the drain lines leading out. Septic tanks and drain fields are serviced by septic contractors. If a backup could be either, we help you figure out which.

Sources

• Fairfax County Health Department — Onsite Sewage and Private Well Water Systems
• Fairfax County Health Department — Healthy Homes Fairfax

Last reviewed 2026-11-07. This page is general information, not legal or insurance advice. Read how we research and check pages in our editorial policy.

Plumbing services in Great Falls

• Leak Detection

  Find hidden leaks in walls, ceilings, floors and yards without tearing the house apart.

• Slab Leak Repair

  Locate and fix leaks under basement and slab floors with spot repair or a reroute.

• Water Line Repair

  Repair or replace the buried line between the meter and your house.

• Emergency Plumber

  Burst pipes, flooding and no-water calls answered around the clock.

• Water Heater Repair

  Repair, replace or upgrade tank and tankless water heaters.

• Drain Cleaning

  Clear slow and clogged sink, tub, floor and main drains.

• Sewer Line Repair

  Camera inspection, root removal and repair of the main sewer line.

• Repiping

  Fix pinhole leaks and replace old copper, galvanized or polybutylene pipe.

• Sump Pump Repair

  Repair, replace and back up the pump that keeps your basement dry.

• Well Pump Repair

  Restore water to homes on private wells, from pressure tank to pump.

• Toilet, Faucet & Shower Repair

  Stop running toilets, dripping faucets and leaking shower pans.

• Pool Leak Detection

  Find where a pool or spa is losing water, then fix the plumbing side.

Nearby areas we cover

• Plumber in McLean
• Plumber in Vienna
• Plumber in Reston
• Plumber in Herndon
• All service areas