<a name="start_36174.388014"></a>I've got an old vacuum gauge (for cars) somewhere...or maybe I can rig up some tubing to test the lift.
Not sure that gauge will go high enough. If you can find a round ball that is solid, drill through and force a piece of metal tubing through it (use some sort of sealant between the tubing and the ball). Attach your gauge to one side and let the vac suck the ball on the other side. That's essentially a water lift gauge. You can buy them too.
Kevin
