Thank you for your question. The Delta Trinsic Lavatory 3559-MPU-DST faucet is designed with a flow rate of 1.2 GPM at 60 PSI. If you are getting a lesser flow than that, we would advised removing and cleaning the aerator in the end of the spout. You may also want to flush out the valve body, so that these parts do last as long as possible. Please first turn off the water supply to the faucet. Gather an adjustable wrench, some towels and a bucket.
Disconnect the hot side Innoflex line. Move the handle to the full on position, middle temp.
Point the hot side Innoflex line into a bucket. Turn on the cold supply valve full.
Let a gallon or two flow into the bucket. Shut off cold supply.
Check bucket for debris. If no debris, empty bucket and run one more time.
Move handle to off position.
Reattach hot side line. Turn on both water supply valves.
Date published: 2018-06-11