I want to install a sink. There is a buried water line (1" poly) to the site of the sink, with a nice long tail on it if needed. The faucet from an old-fashioned separate faucet system, with one input only, at 1/2" thread.
Note that this is cold water only, just for an easy place to wash hands.
Later I may want to add other fixtures. No specific plans, but it might be nice to be able to do so without digging up the water line again. I guess this means I shouldn't reduce to a minimum size with an underground fitting.
It's about 5' from the faucet to the buried pipe.
One option is to bend the 1" poly line and bring it right up to the faucets. I guess I'd need a barbed insert to 3/4" threaded fitting + a 3/4" to 1/2" reducer. Underground I used brass fittings, so I don't have to worry about steel rusting or whatever, but for this situation, should I save the money and get steel? Or PVC? Or nylon?
One option is to put a 90 degree brass elbow in the ground to a riser of some other material (PEX? PVC? Copper?) that comes up below the sink. There are multiple options for how that riser connects to the sink.
I'm used to sinks having a flexible braided hose between the shutoff and the faucet; is that important, or could a rigid riser connect straight to the faucet?
A shutoff valve below the sink might be a good idea, so I don't have to turn off the upstream valve to work on it.
EDIT: I bought a PVC 1" barbed to 1/2" threaded fitting and a kit with a 2' braided hose and a shutoff valve. So I'll try bringing the 1" poly up to under the sink, and then use these bits. We'll see…
Best Answer
I would have probably done that as well (caveat: I am only vaguely familiar with poly, aka "Polybutylene." I have never used it for a job or even had to replace it...It's very uncommon here in northeast Ohio. ) although at first thought, I'm not sure whether it makes a difference to put the Poly to PVC underground or above. I'd also probably put that poly above the sink, then put the Poly to PVC fitting > then the shut off valve, and finally, the braided hose to the faucet..
(FWIW, I'd still use copper, but my boss is extremely old-school..).