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jdwilson3 · 11-03-2008, 06:09 PM

Because, if you somehow pulled vacumn, you could have contaminated water all the way back to the low point (where your check valve is). A bad situation if the check valve failed open.

11-03-2008, 06:09 PM	#19
jdwilson3 Senior Member Join Date: Mar 2006 Location: Austin Arkansas Posts: 399	Because, if you somehow pulled vacumn, you could have contaminated water all the way back to the low point (where your check valve is). A bad situation if the check valve failed open. __________________ John & Peggy 1SG US Army Retired