A whole-house repipe replaces every supply line in the home, from the main shut-off at the foundation to the individual fixture stops at sinks, toilets, showers, and appliances. It is the permanent resolution to a home with aging copper or galvanized steel supply lines that have been producing failures at an increasing rate. For Longmont homeowners managing their third or fourth pinhole leak in an 1980s copper system, or dealing with the reduced flow pressure that indicates advanced galvanized corrosion in an Old Town home, the repipe calculation often favors the single intervention over continued individual repairs.
Longmont has two primary repipe cohorts. The first is the Old Town galvanized steel inventory, built between 1900 and 1960. Galvanized steel supply lines have an expected service life of forty to seventy years. Most of what remains in service in Old Town is at or well beyond the upper end of that range. The bore has narrowed through progressive corrosion, and water pressure at the fixtures is measurably reduced. The second cohort is the 1975-to-1995 copper in the post-war and growth neighborhoods: Spring Valley, Twin Peaks, Quail Crossing, Southmoor Park. Forty-year-old copper in a medium-hard water environment produces recurring pinhole failures that individual spot repairs cannot stop at the system level.
PEX-A Repipe: Why It Fits Colorado Homes
PEX-A tubing is the current standard for whole-house repipe in Colorado's climate. It is flexible enough to accommodate the small movements that bentonite expansive clay imposes on the foundation structure, which is a meaningful consideration in Longmont's soil environment. It is cross-linked at a molecular level (the A designation refers to the peroxide cross-link method), giving it superior burst resistance compared to PEX-B, and it expands for fitting connections rather than using crimp rings, which makes the joints more resistant to freeze damage in USDA Zone 5b winters. PEX-A does not scale internally the way copper does in medium-hard water, eliminating the primary degradation mechanism that produces pinhole failure in the existing system.
What a Repipe Involves in Longmont
We work room by room through the home, installing new PEX-A runs from the manifold at the main shut-off to each fixture stop. Wall access is typically through small strategic cuts at each fixture location rather than open-wall demolition; we patch drywall as we close each room. The full project for a typical single-family Longmont home runs two to three days. Water service is maintained to unaffected sections during most of the work. The finished system is pressure-tested to 150 PSI before any walls are closed.
Frequently Asked Questions
When does whole-house repiping make sense in Longmont?
When a home has had two or more pinhole failures in copper pipe within a few years, or when galvanized steel supply lines are showing reduced flow pressure and joint failures, the repipe is typically more cost-effective than continued individual repairs. Homes built between 1975 and 1995 with original copper are the most common candidates in Longmont.
Why PEX-A for Colorado homes specifically?
PEX-A is flexible enough to accommodate the small foundation movements from bentonite expansive clay, has superior freeze resistance for Zone 5b winters, and does not scale internally in medium-hard water. It eliminates the primary degradation mechanism that causes pinhole failure in the copper systems it replaces.
How long does a whole-house repipe take in Longmont?
A typical single-family Longmont home runs two to three days. We work room by room, maintain water service to unaffected sections throughout, and pressure-test to 150 PSI before closing any walls. Drywall patching is included in the project scope.