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Technical question: I'm refitting a DIY canister filter for a larger tank. Was using 3/4 PVC for intake and return.
I need to put a union on the return, doesn't matter where it goes, the inner diameter is over 0.14" narrower than the pipe, Will there be less pressure put on the pump/tubing if the narrow spot is closer or further away from the pump?
I need to put a union on the return, doesn't matter where it goes, the inner diameter is over 0.14" narrower than the pipe, Will there be less pressure put on the pump/tubing if the narrow spot is closer or further away from the pump?