Vacuum Check Valve
Apply 16 in. Hg vacuum to check side of valve and trap. If vacuum is more than 15 in. Hg for 10 seconds, valve operation is normal. If vacuum is not within specification, replace valve.
Apply 16 in. Hg vacuum to check side of valve and trap. If vacuum is more than 15 in. Hg for 10 seconds, valve operation is normal. If vacuum is not within specification, replace valve.