Fixing Low Water Pressure (Valve and Fixture Maintenance)

easyHome Repair30-60 minutes8 steps

Safety Warnings

Shut off the main water supply before performing any disassembly to prevent flooding.

Screwdriver — Phillips #2

Wrench — 1/2-inch

Plunger Washer — Standard size for supply valve(1)

Float-valve Assembly — Replacement unit(1)

Shut off the water supply valve to the affected fixture to ensure a dry work area.

Inspect the shower head or faucet for mineral buildup or debris that may be restricting flow.

Disassemble the supply valve to inspect the internal plunger washer.

Remove and replace the worn plunger washer if it is damaged or degraded.

Inspect the float-valve assembly in the tank for signs of heavy corrosion.

Replace the entire float-valve assembly if it is badly corroded.

Reassemble all valve components and fixtures securely.

Slowly open the supply valve and test the water pressure.

A worn plunger washer in the supply valve is a common cause of leaks and pressure issues.
If a shower head drips or has low pressure, first check if the supply valve is fully open or needs repair.

Synthesized from 6 verified sources:

Gutenberg: Simple Plumbing Repairs (FB 1460)View →

USDA Farmers' Bulletin (Gutenberg)View →

Gutenberg: Plain Concrete for Farm UseView →

Wikipedia (CC BY-SA 4.0)View →