2522 pump/valves

Mark and Kevin Daw did some extensive dry prime testing on 2522 today using a couple of external vacuum gauges.  When it was all said and done the pump lost nine pounds over the course of the test.  By the documentation we have that is acceptable.  In the efforts to fully drain the pump it appears that a minute amount of what we believe to be Class A foam/water may be continuously entering the pump through an unknown route.  The foam/water kept coming out of the main drain (no vacuum).  One might think that the rate of accumulation would be greater under vacuum.  We will need to keep an eye on this in the future and spend some more time looking at how this is happening.