Low Water Pressure in Your Friendswood Home — Causes and Fixes
Low water pressure in a Friendswood home ranges from a mild annoyance to a system-wide problem. The fix depends entirely on which cause is at work.
1. Clogged Aerator or Shower Head (Single Fixture Only)
If only one fixture has low pressure, the problem is at that fixture. Friendswood's 12 to 15 grain hard water deposits mineral scale inside aerators and shower heads over 1 to 3 years. Fix: unscrew aerator, soak in white vinegar for 2 hours, scrub, reinstall.
2. Failed Pressure Regulator (Whole-House Low Pressure)
City water pressure in Friendswood runs 70 to 90 PSI. The regulator reduces it to 55 to 65 PSI. When it fails, pressure can drop below 40 PSI. A pressure gauge threaded onto an outdoor hose bib ($12) reads your house pressure directly. Fix: pressure regulator replacement runs $285 to $485 installed.
3. Partially-Closed Main Shut-Off
Sometimes a main shut-off valve is accidentally partly closed. Locate the main shut-off and verify it is fully open.
4. Mineral Buildup Inside Galvanized Pipes (Pre-1970 Homes)
Pre-1970 Friendswood homes with original galvanized steel supply lines have 50+ years of internal corrosion. A 3/4" pipe can be narrowed to 1/4" of effective diameter. Fix: whole-house PEX-A repipe.
5. Hidden Supply Line Leak
A slow leak somewhere between the main shut-off and your fixtures reduces pressure. Shut off every fixture, note the water meter, wait 60 minutes. If the meter has moved, water is leaving somewhere.
6. Water Softener Resin Depletion
If pressure has slowly declined over months and you have a softener, the resin bed may be exhausted. Bypass the softener temporarily and recheck pressure.
7. City Main Issue (Entire Neighborhood)
Occasionally the problem is not on your property. Ask neighbors. If yes, call the City of Friendswood utility line.