Backflow preventer for pool autofill

[chemillion]

What is the proper backflow preventer for the autofill line? I’ve seen these commonly installed in the attached photo but is it the correct ones? Is this an Orbit?
Should it be a reduced principle back flow preventer?

 

[Divin Dave]

I cant tell from your pic exactly which type that is,.... there are several designs and they all perform their function just fine as long as they are installed correctly.

To google different ones up, use the term Pressure Vacuum Breaker.

TFP link showing a PVB installed

New pool owner Chico, CA

We have just put in a pool, they put the acid in friday and we are brushing away, anxiously waiting to be able to swim. I am also dealing with a leak and the pool company is closed until Tuesday so that is exciting. Is anyone able to tell me what the plumbing with the yellow handles would be...

www.troublefreepool.com

 

[chemillion]

I cant tell from your pic exactly which type that is,.... there are several designs and they all perform their function just fine as long as they are installed correctly.

To google different ones up, use the term Pressure Vacuum Breaker.

Just looked it up so this is an anti-siphon valve made by Orbit replaced with a handwheel.
I believe city codes specify RP pressure vacuum breaker backflow preventer which is the correct one. Per CPC603.5.20

 

[MyAZPool]

Just looked it up so this is an anti-siphon valve made by Orbit replaced with a handwheel.
I believe city codes specify RP pressure vacuum breaker backflow preventer which is the correct one. Per CPC603.5.20

chemillion
I choose "door #1" I use the Zurn Wilkins 720 on both my pool auto refill line and on my irrigation manifold.
Good job on the research
r.