Why Your Water Pressure Is Low — A Diagnostic Guide
Low pressure has many causes — and most can be fixed inexpensively if you know where to look.
First, isolate the problem
Is it just one faucet, one bathroom, or the whole house? One faucet — almost always a clogged aerator or cartridge. One bathroom — likely a partially closed shut-off valve or a clogged shower cartridge. Whole house — pressure regulator, main valve, or supply-line corrosion.
Quick fixes you can try
Unscrew the aerator and clean it. Turn shut-off valves under sinks fully on (sometimes contractors leave them partially closed). Check that your main water valve in the basement is fully open.
When to call us
If pressure drops everywhere and you've ruled out the simple fixes, you may have a failing pressure-reducing valve, a partially closed municipal valve at the curb, or — in older Milton homes — galvanised supply pipes that are nearly closed off internally with corrosion.
FAQ
What's normal water pressure?
40–60 PSI is normal residential. Below 30 feels weak; above 80 stresses fixtures.
Need a pro for this?
Call Stonegate Plumber Milton 24/7 at (289) 514-9214.