Have Moen tub facet with a single handle and shower diverter. The faucet drips after being shut off. The drip is very very slow. Is it the diverter or does need a cartridge replacement. Thanks! G.J. Maffei

Be sure to pull the plunger all the way up when diverting the water between the the tub and shower if ti keeps giving you a problem it's faulty

The dripping is most likely the water draining back down from the shower riser. Is the diverter button popping back out when the water is shut off?

Sounds like your diverter valve is installed upside down.

Call Moen directly. They will ship what you need to your door, for free.

It can be repaired without taking entire valve out of wall. First shut water off and remove handle. Next you will see a collar that will screw off to remove the cartridge below is a link for a single handle moen faucet. Check it out to get an idea. If you know your model you can research on line ,but they are close enough to give you an idea.
Once appart replace washers or o -ring's. Pay attention to how you take it appart for easy reinstallation.

http://www.moen.com/shared/pdf/t2703pt.pdf This link is aparts breakdown of a single handle faucet.

http://www.moen.com/shared/pdf/t2703pt.pdf This site is installation instructions.

http://www.efaucets.com/detail.asp?Product_Id=T2703 This site you can enter you faucet model to retrive information.

The old MOEN single handle faucets like youve described usualy took a 1200 or 1225 cartridge. Both are available at most of your big home improvement stores. The answer to your question is yes MOEN parts are still avail. Hope this helps. If this advise is helpful, please give me a vote.

Not unless you had a backward plumber , If the diverter at the faucet is open for tub, then no water will go up the shower, The shower may hold enough water up there to make it look like a drip, Even if the valve was leaking all the time, it would not go up, it would come out the faucet. It only works with pressure. Unless the valve was plumbed wrong,,, Hope this helps.

push down the tub-spout lift rod and it will empty the remaining water that is between the shower valve and the tub spout

sound's like you either have some debris caught up in there, or you might not have your handle on correctly. give that a try .

the problem is in the shower fitting the part with the handle ,depends on who made it but you replace washers or a cartridge some times easy some times not