Why Does My New Faucet Have Reduced Flow?

A lower-flow faucet might save water.

New faucets are often different, in terms of operation, than the faucet you're replacing. Some may not produce as much hot water or may have different flow rates, due to the parts inside the faucet and its design. If this happens to you, don't worry: It is normal.

Low-Flow Faucets

If your faucet is a low-flow faucet designed to dispense water at a lower flow rate, it will appear to have less water pressure. But in reality, the faucet is operating under the same exact water pressure as the old one; the flow rate, or the water coming out of the faucet, is slower. A low-flow faucet uses a cartridge that hampers water flow. The purpose of such a faucet is to conserve water.

Faucet Cartridge Issues

If you checked your new faucet's manual to find out whether the faucet is a low-flow model and you found out that it isn't, there are other problems that may contribute to the lower water pressure. At times, debris blocks water flow in the faucet. This debris collects on the cartridge, stopping up one or more of the holes that act as inlets for the water. To fix the issue, take off the faucet handle by removing the set screw on the side of the handle and pull out the cartridge. Wash it off in clean water and reinsert it.

Aerator Blockage

Another common problem is a blockage in the aerator, the mesh screen on the end of the spout. A blockage will prevent water from coming out the spout at full force, simulating a reduction in water pressure. To clear such a blockage, unscrew the aerator from the end of the spout and wash it out in clean water. Then replace it and try the faucet again.

Plumbing Issues

Issues with plumbing in the home also affect the faucets. If a plumbing line is blocked or water pressure is reduced throughout the entire home, it may appear as if the new faucet has lower water pressure. To identify this as the problem, test all the faucets by turning them on one at a time. If they are all equally low in pressure, the plumbing is to blame. It is best to call a professional to fix this issue as it is very involved.

References

• Ask the Builder: Low Water Pressure Facts

Resources

• Plumbing Mart: Information About Faucets