Just moved in and noticed the kitchen faucet has low flow. About 1 GPM. Rest of the house is fine.

Seems like the faucet supply lines are too narrow.

Never seen this before. Is this normal?

The extreme left and right lines are the hot and cold. The other two are the pull down head in and out lines.

The connectors are 1/2 inch for reference.

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Here's a pic of the full flow:

enter image description here

  • 2
    Check whether the aerator is rated for 1.5 gpm (green) or 2.5 (red). homedepot.com/p/…. They even go as low as 1.2 gpm and .5
    – MonkeyZeus
    Mar 5, 2020 at 20:18
  • 1
    Also, remove the aerator and see f the flow improves. Make sure the supply valves are fully open.
    – JACK
    Mar 5, 2020 at 20:27
  • 1
    Aerator is 2.2 GPM. Flow is the same without aerator and valves fully open.
    – user113080
    Mar 5, 2020 at 20:28
  • Assuming that's 3/8 copper then the flow rate should be 1-2 gpm according to s3.supplyhouse.com/product_category_files/… but that's dependent on the water pressure coming into your home. None of the other fixtures use such small tubing? My kitchen sink uses the same stuff and my 2.5 gpm aerator supplies adequate water. A kitchen generally uses the most water so it would make sense that they would forcefully restrict water flow here; whether that's an overall good idea is debatable.
    – MonkeyZeus
    Mar 5, 2020 at 20:39
  • Can you add a picture of the water flow at full blast?
    – MonkeyZeus
    Mar 5, 2020 at 20:39


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