Grey schedule 80 nipples for potable water

[twigpig]

At the sugestion of a local hardware store I used gray schedule 80 nipples in the cold water supply system. They said the joints were stronger than glued pvc and were good for potable water. I was at HD getting some fittings so I can test a fire sprinkler system and needed a couple of 1/2" threaded pvc nipples for the volume test. I was surprised to see printed on a lable "for outdoor use only". I asked the HD plumbing guys and they said that grey pvc fittings are not for potable water.
when I got home I tried to look up the specs. for Spears grey schedule 80 threaded pipe but had no luck. I found other pipe, fittings and valves though. I really don't want to take this system apart and start over. It took me quite a while to get all of the fittings to stop leaking. It is dry as a bone now. Because of the fire sprinkler system and the required booster pump and 300 gal tank the plumbing got a little complicated. So can gray threaded schedule 80 nipples be used in potable water systems for the cold supply water in the garage? I used PEX for the regular house plumbing and Spears Blazemaster cpvc for the fire sprinkler system. I put a 75 lb. preassure releif valve at the booster pump.

 

[hj]

Pvc

I have never heard of such a thing, although HD's threaded nipples may be ABS or schedule 40 PVC. I use sch. 80 gray PVC for water pipe, threaded or glued, whenever it is the best product for the application.

 

[Sponsor]

 

[twigpig]

Thank you for the response. After seven years of building we were hoping to final in a few weeks.

 

[Gary Slusser]

Many water treatment equipment manufactures use sch 40 & 80 PVC parts. I've never heard of 'not for potable water use' or not inside a building.