I used a 1"X1/2 pex plumbing tee, you can get this at any plumbing supply store. the other tee is just a straight 1/2 pex tee. they are made of brass, they will last for ever. I would never use anything else. vangard is one maker of the pex tee. don't go to home depot type plumbing stores, they have them, but may not know what you are looking for. good luck, my is working fine.