Four Pipe Generations, Four Failure Modes
Galvanized steel served the pre-war city and much of it is still in the walls. It fails from the inside as the zinc coating gives out, rusting shut at fittings, bleeding pressure, and eventually weeping at threads. Copper took over through the post-war decades and fails by pitting, at joints where flux was overused, and wherever a line touches dissimilar metal. CPVC and polybutylene appear in scattered remodel eras and grow brittle or fail at fittings. PEX, the current standard, is durable but not immortal: fittings, rodent damage, and UV exposure before installation account for most of its leaks.
The practical point is that the material predicts the failure. Tell us the pipe and the symptom, and the search area shrinks before the truck leaves the shop.
Reading the House Before Reading the Pipe
Most owners do not know their pipe inventory, and Boulder houses rarely have just one. A Newlands bungalow might carry original galvanized to the kitchen, 1970s copper in a bathroom addition, and PEX from a recent water heater swap. Our first pass on a mystery leak maps what is actually in the walls using the visible runs, the fittings at the heater and meter, and the home's construction and remodel history. That map decides which instruments matter, since a threaded steel system leaks at joints while copper leaks mid-run.
Locating the Failure
Pressurized pipe leaks get the standard escalation: isolate the section on the meter, listen along the run with acoustic gear, image the surfaces with thermal, and confirm stubborn cases with tracer gas. Drain pipes get dye and camera work instead, since gravity lines never move a meter. Either way the outcome is a marked point and a photo, not a hunch, and the wall or ceiling opens only at that mark.
Repairs That Match the Material
Copper gets cut back to bright metal and sweated or press-fitted with new pipe. Galvanized is the honest-conversation material: a single failed thread can be remade, but steel that leaks once is announcing general corrosion, and section replacement in copper or PEX usually beats re-threading rust. Plastic systems get their failed fittings replaced with the correct current-generation parts rather than glued-over. Where corrosion is the story, we look for its siblings while the wall is open. A pitted copper line rarely pits in just one place, and the fine mist of a pinhole failure often has company a few feet away.
Pressure: The Multiplier Behind Pipe Failures
Whatever the material, house pressure decides how fast weaknesses become leaks. Supply pressure above 80 psi stresses every joint, valve, and flex line in the building, and parts of Boulder's gravity-fed system deliver static pressure well above that to lower-elevation homes. The fix is a pressure regulator at the service entry, and checking one is part of every pipe call we run. A failing regulator shows up as banging pipes, faucets that spit, and fixtures that fail young. If your home has never had its static pressure read, ask during any visit; the gauge takes two minutes and explains a surprising share of chronic leak histories.
The short version of this page is simple. Find out what pipe you own. Learn how that pipe fails. Fix small problems while they are small. A house with a known pipe map is a cheap house to keep dry, and we can draw that map in one visit.
Every repair closes with a pressure test and written notes on material, cause, and location. If the finding is that your pipe generation is near end of life, you get that assessment with a separate repipe quote and zero pressure, because the patch will hold either way. Homes around Newlands and anywhere else in the city can start with a call to (303) 552-3896.