October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

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.