Been having this problem for a couple of weeks now. Both hot and cold will continue to run slowly for a few seconds after shutting the valve off. I also had lower pressure than normal for awhile but cleaning the aerator fixed that. It's a two handle faucet with spray hose. I got new valves at Home Depot and replaced both sides but no change. The valves have a white plastic body with brass stem.

Any suggestions are appreciated before I move on to a new faucet .

It is probably pressure build up and then drain down in the spray hose.

On alot of Delta faucets the culprit is the rubber seals and springs down in the bottom of the valve body that need to be rpl. DL-9 is a common set. The valve cartridge body rarely fails.


I use a skinny phillips screwdriver to slip the new seals and springs onto, apply a little dab of plumbers grease to the seal, stick the end of the phillips into the seat and slide the new parts off the shaft and into the seats. With a little luck, they will line up where they can be pushed into the "hole" and pressed down into position.

You can also use a tire gauge. Pull the stem out, slide the seat and spring on to it, stick it into the hole and then push the gauge down to set the seat into the faucet.

Thanks. After replacing the valves I removed the spout, cleaned it up a bit and re-assembled and now all is well (for now anyway). I actually bought the parts you show initially but when I took the valve out I didn't see the spring. It's not inside the valve assembly, I expected to see them in the housing that the valve slides into. But I couldn't feel them nor see them using a flashlight, maybe I just missed them. Do all Deltas have those?

Unless the cartridges have been replaced with ceramic cartridges, yes.

If your faucet has these, you will not see the spring when you pull the cartridge. It is hidden under the rubber seal in the bottom of the valve body.

ALL Delta springs are hidden in the valve body under the rubber seal.