I understand your point but if your looking for maximum preformance from your pump. closing the top 2 ball valves to redirect the flow to the bottom 2 holes will reduce the flow in your closed loop system.
I'm just being nit pickey btw. Looks ok but you asked if we saw anything that looked fishey
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No matter what the morrow brings, inventors keep inventing things.
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Jonathan
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www.cakerybakery.ca
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