Delta 473 loose connection to sick

THE LINE MAY BE CRIPPED. TIGHTEN THE NUT OR REPLACE THE NUT IF IT WILL NOT TIGHTEN. YOU MAY NEED A LONGER WATER LINE TO GET AROUND THE BUMP.

Turn off the water supply from the heater and at the main water supply line outside. place a container under the sink where the flick mixer is mounted to catch the water that will come out of the lines when you undo the fittings.
there should be 2 flexible braided lines coming from the mixer to the water supply lines, undo both fittings from those lines, then undo the brass nut that fastens the mixer to the sink, you may need a 10 or 12mm socket with an extension bar to get up under the sink to be able to undo the nut.
there should be a metal horseshoe shaped retaining plate that holds the mixer to the sink which should come off when the nut is undone.
You may or may not have to remove the flexible lines from the mixer which you should be able to sort out when you get to that point.
I hope this info helps you with your problem, the info may not be exactly how I have explained but that is how most mixers are fitted or removed.

there should be 2 plastic nuts under the sink that hold the fixture tight to the sink. if they are tight allready try to install washers and see if that helps. right is tight. left is loose.

look under or beneath sink. there has to be mounting nuts on it !! where supply lines are.

There should be a nut hatched to faucet. If not there look in cabinet.

from the bottom

If it is faucet body on sink loose under sink there should be screws and a plate or washers holding it sink. Tighten them up.


Some have a bolt or nut in the middle requiring a socket to tighten.

If the spout is loose remove handle and it has a plastic ring on top to tighten spout up.

Try removing the **** Trap under the sink, there are two nuts one on each side. put a pan under the sink to catch the waste water in the trap first. ext loosen the nuts with a pair of channel locks or a pipe wrench turn the nuts counter clock wise direction till the nuts are loose slide the trap down and empty the contents of the trap into the bucket. Use rubber gloves so you don't get sick from germs. If the **** trap is plugged use a coat hanger to push threw the trap to get whatever is plugging it out. Rinse in a different sink, If it has the rubber gaskets I would recommend replacing the gaskets. Install in reverse. Do not over tighten the nuts or you will have to replace the parts. the trap looks like 2 opposing J .

Check the screen at the hose connection under the sink. Check the hoses for any large debris in them. Verify that the water pressure coming from the water outlets under the sink is good. There is obviously a restriction somewhere...you just need to locate it.

This is a view from the underside of our sink. Is this what you were talking about? The steel plate is W-shaped (upside down in this case) and has a single nut larger than 3/4". It's almost impossible to fit a wrench up there to tighten it.