Return Line Advise

Ecotech Marine

jc75

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Hello everyone, I need to drill return lines in a new tank and locked in indecision. It is a 75 gallon tank with prodigy L overflow installed and most likely a cor-20 return pump. The pump can run at 1 1/4”. Even though the loc line is only 3/4” should I run 1 1/4” pipe and drill for a 1 1/4” bulkhead? Use 3/4” bulkhead and reduce before the bulkhead? Or just stick to 3/4” for everything. I can’t decide what size hole to drill or size plumbing to run. Looking to gain wisdom from others experience to make the right decision.
Also another question I have is should I drill for another bulkhead on the other side of the aquarium and plug it to have for future options in case I need it?
 
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Saltyreef

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Whatever size exits the return pump, id stick with that.
Example, my vectra has a .75" discharge oriface.
I stuck with 3/4 the whole way.

Id also vote no for the extra hole.
Plan what you want first, then execute the plan.
 

Rob.bucek

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Are you using bullheads in your sump? 1 1/4 bullheads (abs) are all but non-existent and while you can get cpvc in that size they are expensive. For only a 75 gallon using 1" will get you plenty of turnover for what you need imo. You can even drill the tank for 1" and get a reducer for the loc line at that point. Keeps it simple, at your side tank anything larger is overkill.
 

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