Installing Kitchen Faucet, Leaks at RO Valve Adapter

Hi,

I'm in the process of switching out an old kitchen faucet for a new one. The sink has an adapter that splits the cold water between the reverse osmosis system and the faucet's cold water input. Even after I tighten down the faucet's cold water input into this adapter, it leaks out of the threads. Maybe I'm not tightening it down hard enough? When I look inside the adapter, there's no rubber seal, just a little metal lip, so I guess this is supposed to work with metal-on-metal contact.

I've included photos of this adapter, as well as the new and old cold inputs for the faucets.

Any help is greatly appreciated!

preston

where's the washer? see if a washer off your garden hose will fit

Why all the Teflon tape?

Hi,

Whoever did the work before me put Teflon tape on everything. I decided to put the new faucet on the exact same way as the old one, so I put Teflon tape on the hot and cold inlets. Everywhere else you see the tape, it was already there.

Frodo - That's what I was wondering about. Why is there no washer and why did the old faucet not leak at that point of contact? I tried to look on the floor to see if I may have dropped a washer (like it came out stuck to the cold inlet threads and fell onto the ground or something).

I'm sure you understand the configuration already but here's a photo.

Also, I will look into what type of washer will fit into there. I have some garden hose washers and will report back.

A garden hose washer is too big to fit.

The top of the female fitting is 1/2" IPS, the old faucet had matching threads. The new faucet has the same thread pattern, but has the sides "cut off". The new faucet needs the forcing cone of a faucet supply tube to seal against.

phishfood said:

The top of the female fitting is 1/2" IPS, the old faucet had matching threads. The new faucet has the same thread pattern, but has the sides "cut off". The new faucet needs the forcing cone of a faucet supply tube to seal against.

Click to expand...

your saying he need s cone washer, supply tube not a flat washer

Ok I went to Lowes and purchased a replacement adapter, and it works. The new adapter has a metal cone that form-fits with the respective cone in the cold inlet on the faucet. The old adapter probably didn't work with the new faucet because the old cold inlet made a unique physical imprint on the metal ring inside the adapter. That's my theory anyway. It turns out that these adapters do not need rubber washers.

damn,,I HATE being wrong !!!!!!!!!!