Thank you for your question and I am sorry to hear that you are experiencing low flow from your Delta faucet. We do recommend to flush the valve to make sure no debris is causing the low flow. To flush, first turn off the water supply to the faucet.
1. Remove the handle. On the lever handle, you should find a Phillps head screw under the top cap cover. The handle will lift off when this screw is loose enough.
2. Once the handle has been removed, unscrew the dome-shaped cap. The domed shaped cap will unscrew counter-clockwise.
3. Once the cap has been removed, grasp the round metal stem. The valve cartridge will pull straight out. Also remove the flow restrictor and rinse these parts. You will need to reinstall these parts later, so be sure to note how they are positioned in the valve.
4. Now, with the valve completely disassembled, place a bucket upside down over the top of the empty brass valve body. Turn the hot and cold water supplies back on and let the water run for about 10 to 15 seconds. The water will come directly up out of the valve and should mostly be deflected back into the sink by the bucket. You might have a little bit of water to clean up, though!
5. Shut off the water supplies. Reinstall all parts.
If the flow is not better, please contact our Delta Customer Service line at (800)345-3358. We are available Monday-Friday, 7am-7pm, CST and Saturday, 8am-5pm, CST. You may also email at firstname.lastname@example.org.
Date published: 2019-02-18