Thanks for that info, and the pic!
Those outlets on the OM4 look small - are they 3/4"?
If I go this route, I think I will use flexible hose for the connections to the OM4 outlets...and yes, 4 add'l union valves will definitely increase expense, weight, etc...
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- Mike & Terry
"Less technology, more biology ... indeed." - Gary White
Current Tank Info: 200g temp garage tank
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