Plumbing Defects Hide Until They Do Not
Plumbing is one of the few home systems that runs almost entirely out of sight, inside walls, under slabs, and above ceilings. That invisibility is exactly why plumbing defects are so often caught late, after a slow leak has already damaged framing, drywall, or flooring.
In most states, including Utah, plumbing systems fall under the two-year mechanical systems warranty rather than the one-year workmanship period. That gives homeowners a longer window to catch defects, but only if they know what to look for.
Common Plumbing Defects in New Construction
Slow or hidden leaks
A fitting that was not fully tightened, a supply line pinched during installation, or a poorly soldered joint can weep slowly for months. The first visible sign is often a stain on a ceiling or the base of a wall, long after the leak began.
Low or uneven water pressure
Pressure that is weak throughout the home, or noticeably weaker at certain fixtures, can indicate undersized supply lines, a partially closed valve left over from construction, or debris in the lines.
Drainage and venting problems
Slow drains, gurgling sounds, or sewer odors often point to improper drain slope or venting defects. These are workmanship issues that will not resolve on their own.
Water heater installation defects
An improperly sized, incorrectly vented, or poorly connected water heater is a builder responsibility when the defect stems from installation rather than the appliance itself.
Water quality issues
Discolored water, a persistent metallic taste, or sediment at fixtures can indicate debris left in the lines during construction or a defect in how the system was flushed and commissioned.
How to Document a Plumbing Claim
Because plumbing defects are often intermittent, documentation matters even more than usual. Photograph any staining or moisture and note the exact date. If a leak is active, capture video showing the water. Record whether the problem is constant or tied to specific use, such as running a particular fixture or the dishwasher.
For pressure or water quality issues, a written assessment from a licensed plumber carries significant weight and helps distinguish an installation defect from normal variation.
Do Not Wait on a Suspected Leak
Water damage compounds quickly. A defect that would have been a simple fitting repair can become a mold remediation and framing replacement project within a single season. If you suspect a plumbing defect, report it in writing immediately, even if the visible symptom seems minor.
Plumbing coverage usually runs two years. Use every month of it, and never sit on a suspected leak.