Pump intake outake size?

[herpsandreefs]

If I get a pump the does about 1200gph and it says 1" outake and intake, is there anything wrong with using 1.5"intake and 1.25" outake, then reducing when I get to the pump? I would think it would only put less strain on the pump but wanted to double check.

Thanks,
Chris

 

[Anonymous]

You are correct. A bigger pipe size on the intake helps reduce the losses on the suction side.

 

[herpsandreefs]

What about the outake?

 

[Anonymous]

It would not hurt. Pumps are designed to overcome some pressure on the output side. Any time you increase the area the flow passes through you reduce the losses. The flow/friction component varies as the velosity squared. So a little extra flow area goes a long way.