Moen 7700 leaking at base of faucet. how do you get to o-rings

You need to replace the spout o-ring seals. A Moen #117 spout oring kit. If you have a faucet with a sprayer, you will use all three rings. If uit has no spray, you will use only two.

Dismantel the entire faucet and clean. Probably grime or dirth buildup if it has a rotating shutoff

there might be a allan screw holding it down usually located at the back of the faucet if not there is a chance that there is a screw on escutcheon just above the base of the spout this should screw off with a strap wrench.

You can just replace the o-rings. You have to remove the large nut at the base of the spout. I posted a blog post -and a video about me replacing mine.

http://blog.trebacz.com/2012/12/how-to-fix-leaking-moen-kitchen-faucet.html


The replacement o-ring and retainer parts were free to me. Hope it helps you.

The cylinder which surrounds the bottom of the spout is part of the spout. The cylinder is sealed with o-rings at top and bottom. They probably need replaced. Feel free to use lubricant.
:o).

Replace the "O" rings that are behind the spout portion. You will have to remove the top of the faucet and pull up on the spout section. There will be a couple of "O" rings there. It is best to have Moen send the parts to you as locating the proper size "O" rings can be difficult.

The spout cover is threaded and unscrews then remove spout and replace the o rings with a Moen o ring kit only use Moen brand or Ace Hardware brand

if it is dripping from the spout then there is a cartridge that needs replaced...1225 for the single handle type and 1224 for the 2 handle type. Moen does not use O-rings in their valves. If it leaking around the base of the spout there is an oring kit that you will need and you will have to pull the spout off to access them. Most Moen faucets use a 117 kit for the spout but there are some different ones.

cartridge does not stop that type of leak. If it is leaking from around the base of the spout it is o-rings that are the problem that are onthe valve after you pull the spout all the way off.

You have a bad internal o-ring or the sprayer o-ring is leaking, if you look under the sink turn it off and then turn it back on, if you see it leaking out the center shft where the water pipes go into then the faucet may have a broken pipe or loose pipe. check and tell me where it's leaking at. You can buy kits to repiar them they are inexpensive.