A common yet often ignored problem, low water pressure in a kitchen faucet is caused by a myriad of issues. On occasion, low water pressure will need the experience of a professional, but even in those cases, identifying the problem will help greatly in getting the repair finished quickly.
There are several ways to determine why your kitchen faucet has low water pressure. First, if you have recently remodeled or done any construction that has included new water fixtures, the issue is likely low delivery and can be fixed by upgrading your main pipe. In the case of a single clogged spout, you can simply unscrew the spout on the troublesome faucet and check the aerator for build-up. On the other hand, if you’re having pressure issues throughout the house, consider adding a supplemental booster pump to the main line. These are all moderately easy fixes.
In the case that the low pressure is only occurring in the kitchen, the problem is equally easy to work on. You’ll likely find a screen at the end of the faucet spout where the water comes out. Unscrew the spout by hand and check for any build-up; this is much like dealing with a clog. Remove apparent blockage is a no-brainer but you might also find sediment, which takes a bit more time. You must first unscrew the aerator, take it apart, and soak all the individual parts in a mixture of warm water and vinegar. If the crud won’t budge, get thee to a hardware or department store and get a commercial calcium remover and soak the parts in that. In either case, after the build-up is removed, dry the spout, reassemble and reattach the aerator to the faucet before testing.
Here’s where things get interesting. Sometimes, the faucet’s cartridge, which allows water to pass through the spout, can malfunction and cause low pressure. If this is the case, you must remove the faucet head, find and unscrew the screw under the faucet spout, and lift off the faucet head. You should see the cartridge right there and it should be open. If not, remove the housing and clean everything of debris or calcium build-up. Replace the thin housing and faucet head before testing the solution.
The worst-case scenario is build-up in the faucet piping. With galvanized piping, the issue is likely build-up from age and sediment. If you’re feeling adventurous, you can diagnose this by unscrewing the riser from the basement and then back up the fitting in the basement to ensure the attached pipe or fitting does not break. Put a bucket below it and have a friend or family member turn the water on to check the flow and pressure of the removed pipe. If it’s not good, you’ll want to look into getting your entire home re-piped (sorry!), as this is an issue far beyond cleaners. If everything seems good, you likely just need one of the prior fixes. Thank your lucky stars.