Low water pressure can be caused by external or internal issues. It could be area wide or limited to your home. There are multiple reasons why your home is experiencing low pressure. You can diagnose some problems yourself, while others may require a plumbing repair professional. Possibilities include:
External water main breaks
Low water pressure caused by broken supply mains are generally of short duration, lasting only until the supply pipes are repaired. If your neighbors begin to experience low pressure at roughly the same time, this points to an external water supply issue.
Contact your local Department of Public Works to find out about any water main breaks in the area, and when they will be repaired. Ask your neighbors to also call so that the repairs may be prioritized higher that those that have received fewer complaints.
Leaks within the home
All water leaks are not as clearly visible as a burst pipe in an accessible area. Leaks may occur underground or inside walls.
If you have access to your water meter, which records water use for billing purposes, you can use it to determine if a hidden leak is the source of your low water pressure.
Gather all occupants of the home and ask them to refrain from using water for thirty minutes. Record the numbers on the water meter. After thirty minutes, check the water meter again. If the usage numbers have increased, you need to call a plumber to find the leak and repair it.
Clogged shower heads or faucet filters
The small holes in showerheads can become clogged with rust or sediment that may be present in older pipes. Shower heads need to be removed and cleaned if water flow starts to become slow or irregular.
Removing the perforated front part of the shower head usually requires turning it counterclockwise. Once removed, the perforated holes should be cleaned with a bristled scrub brush from the inside of the shower head. This will remove deposits that may be blocking the water flow.
Faucet filters are small round screens that are placed at the end of faucets to trap sediment. They can be purchased at a home improvement store and replaced by twisting the screen holder cap at the end of the faucet counterclockwise.
When the cap is removed, push the screen out with your finger, insert a new screen, and replace the faucet cap.
Older galvanized steel pipes will eventually rust away from the inside, even though no damage is visible on the outside of the pipes. Rust and sediment will fill the pipes to the point of blocking water flow. This requires replacing the pipe, either with steel pipe or plastic pipe.
While supply pipe replacement can be done by the homeowner, it is best left to professional plumbers, such as Clean Plumbers BY Phillip Maurici Plumbing Inc. Removing sections of older supply pipe may cause other older pipes to become compromised, requiring the entire line to be replaced.