Kitchen faucet makes knocking noises repeatedly, the faster the water pressure the more knocking, and the knocking gets faster . however when i use my sprayer the knocking stops. i have a delta 1 han

There should be a valve on the outlet and inlet side of the water heater. Make sure they are fully open.

The market is full of brands making these faucets but how to decide which one is the best suited to your needs. Below mentioned are few things which should be kept in mind while making a purchase of a touchless kitchen faucets.

• Position of the motion sensor
  It is important to check where the sensor is placed on your kitchen faucet. Their position varies from brand to brand. Some of them come with the sensor installed on their spout, while others have them at the bottom or the top of the faucet. It is up to you to select the one which suits your needs. Moen touchless faucets have two sensors, and the wave sensor is placed at the top which is responsible for the activation and deactivation of water flow and the other sensor, ready sensor is placed at the bottom, which is used merely for identifying the articles in your sink.
• Power Source
  When it comes to a power source, there are two types of touchless kitchen faucets in the market. For the ones that need a continuous power supply you have to make sure that they are installed near a power outlet in your kitchen. The other type runs on a battery and can be placed anywhere. You can choose either depending upon your kitchen needs.
• Others
  Before buying the faucet for your kitchen make sure its length, height, etc. is appropriate for your kitchen. Also make sure whether it is easily installable or not.

Check the inside of the faucet for debris blocking the cartridge or the inlets.

Pressure change may need a water hammer on hot side.

Possible causes:
1. you have a air pocket t in the heated water system. You will need to bleed the system.
2. As to pressure, you may have knick in pipe somewhere due to worned plastic pipe.

CHECK THE SUPPLY LINES

Try removing the aerator on the faucet. If that resolves the popping sound, try replacing it with one that allows for a higher flow of water. (Also the existing aerator may be clogged).

The singing noise is due to high water pressure of your
water system. It can eliminated by installing a pressure
regulator at your main water lines. But for the meantime,
you can minimize it by closing your main water valves
and open it by two full turns. Hope this will help.

maby look in to getting a prv for your house sounds like you have high water pressure

It could be air if you recently had the water off at the main and let the pipes drain, but this would go away after a short while. It is most likely either a feed line from the wall to the faucet flexing when the pressure and hitting something under the sink or a water line in the wall that may have not been strapped properly to the stud when installed. They bounce around sometimes if not secured. Hopefully the feed line as the second is a bit more work to correct.

Good Luck