Use copper and be a hero

 

Debo22 ... I am right there with you. Unfortunately, after those two upper elbows it's a looooooong run of SCH 80. I could run copper all the way up to those upper elbows, and then transition to SCH 80. I honestly just hate that idea as a transition point. It's 20' up instead of easy access. All that is to say I trust the flange transition more and want access to it.

 

Highly recommend ductile iron to them. Ask them if they want the liability of a major catastrophic flood.

By the way, please post us an introduction in the introduction area.

 

Tommy ... thanks I will add the intro.

The warehouse is 400ftx1500ft. There is alot of SCH 80 running that entire length and doubling back later. I think you are suggesting taking ductile up to the last upper elbow, and then using a flange transition point in the rafters? Just looking to clarify.

 

If it’s lasted 20 years then I’d put it back just like it is.

 

If that water is supplying something I think it could be supplying, you shouldn't use copper. Im with Debo, pro press flange right off that RPZ, gun it and run it.

 

New here

We are replacing a failed 3" inlet gate valve and RPZ backflow assembly. Incoming fixed at 110PSID. Please see photos.

Situation: Just after the last gate valve is a transition to "3" Socket Flange PVC Sch 80" and immediate SCH 80 elbow. After 20' rise there are two quick elbows. Existing SCH 80 is 20 years old. We are concerned about potential thrust on these elbows. Our solution is stay ductile for the first elbow and add flanged restraints, then replace existing high elbows with new SCH 80 elbows.

Question: A couple guys here want to eliminate the upper SCH 80 elbows completely, and solve with 45s. Would 45s actually reduce thrust effect potential? Or, is replacing with new SCH 80 elbows cautious enough? Thanks.

View attachment 139906

Intro required.........................

 

You could go stainless steel hard pipe from the flange, past the second elbow, strap the hell out of it and pretty much eliminate thrust and/or copper issues.