not sure what it's

[zswieca]

Don't come across to many of these, not sure what it's.
Thanks in advance for your help. It is used to fill swimming pool with water.

[Larry D. Kage]

Originally Posted by badair

Pressure Vacuum Breaker (PVB) for back flow prevention of the pool auto fill system or possibly irrigation system...i wasn't there to test either system

Barry's got it.

Nice to see ya, Bear.

[Brian E. Kelly]

Originally Posted by zswieca

Don't come across to many of these, not sure what it's.
Thanks in advance for your help. It is used to fill swimming pool with water.

the green yellow thingy is a water Timer i think

[Jim Kolke]

Larry got it right~ definitely a vacuum breaker. In illinois that is against code. All in ground spinkler systems or pool supplys must use double rpz check valves and must be tested annually. This vacuum breaker might be ok in yous state.