Access Control Housing, STI-7515A orifise In order for a check

In order for a check valve to properly function there should be a differential pressure of at least ½ PSI

The Viking Model J-1 Alarm Check Valve serves as a check valve by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping

Wrench for use with RASCO/Reliable fire sprinkler models:  D-6

WK-872450-000

and it is perfect for use in homes

Access Control Housing, STI-7515A orifise In order for a checkItem: Access Control Housing, STI 7515A Helps solve installation problems for a variety of access control equipment 4. 12 inch white back box Water resistant to provide added protection for important devices Wall mount Mounting hardware included 6. 46 in H x 8. 44 in W x 4. 12 in D SPEC SHEET INSTALLATION SHEET WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other