A bad sprayer head can cause this but more often the diverter is the culprit.
Sink faucet sprayer repair.
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The sprayer pulsates like a machine gun.
If your kitchen faucet is still stuck on spray mode or your kitchen sink sprayer vibrates the problem is with the diverter which diverts water from the faucet to the sprayer and is located inside the faucet.
Turn the water valves back off.
The diverter valve is the part that directs the water from the main faucet to the sprayer when you activate it.
If the water flow out of the hose is weak the diverter is to blame.
To attach the new spray head simply reattach the c clip attach the washer and then screw the spray head onto the hose connection.
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Water continues to flow out of the faucet spout when you re using the sink sprayer.
Turn on the faucet and allow any residual water in the pipes to drain into the sink.