[jmarsa]

Darren,

Thanks for the quick reply. So if valve 1 is open then valve 2 is closed and vice-versa? I've updated the diagram.

Is there a concern that air will flow back through the filters (eventually stopping at the valve)? In other words, are the filters meant to be one way only?

I still need to buy the filters, are you the business and sell to the public?

--JMarsa