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Low Water Pressure in House: 7 Causes and How to Fix Them

Home›Blog›Low Water Pressure in House: 7 Causes and How to Fix Them

Published 2026-09-27 · Florida Cracker Plumbing team

Start by narrowing it down

Is the pressure low at one fixture, only on hot water, or everywhere in the house? One fixture points to a clogged aerator or cartridge. Hot-only points to the water heater. Whole-house low pressure points to the main line, the pressure regulator or a leak.

Clogged aerators and showerheads

Florida's hard water leaves scale in aerator screens. Unscrew the aerator and soak it in vinegar. This fixes a surprising number of low pressure complaints for free.

Failing pressure reducing valve

Many homes have a PRV near the main shut-off. When it fails, pressure drops throughout the house. A plumber can test pressure with a gauge and replace the valve in about an hour.

Partially closed shut-off valve

Check the main valve at the house and at the meter. A valve that was not fully reopened after a repair is a common culprit.

Hidden leaks

A leak in the service line or under the slab steals pressure. If your water meter moves when everything is off, you have a leak. Leak detection pinpoints it without digging.

Corroded galvanized pipe

Homes built before the 1980s may still have galvanized steel pipe that closes up with rust from the inside. Repiping with PEX restores full pressure permanently.

Water heater sediment

If only hot water is weak, sediment in the tank or a clogged heat trap nipple is likely. Flushing the tank or replacing the nipples fixes it.

Get a professional pressure test

Our plumbers test static and flowing pressure at several points to isolate the cause. Water line repair, leak detection and repiping are available across every Florida city.

Need water line repair?

Florida Cracker Plumbing offers water line repair across Florida, including Lake Placid, Fedhaven, Edgewater, Alford, Deerfield Beach, Bradley, Palm Coast, Molino and every other Florida city. Call (888) 809-6756 24/7.

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