Plumbing question - your thoughts?

[KAS]

We are planning to move our sump to the basement and add a fuge. Here's the parameters we are working with.

Overflow is capable of handling about 700 gph (I think)
Drain size is 1" (I think)
Return size is 3/4"
Return pump is a Mak 4 with a 3/4" outlet
Performance chart for 12' of head loss is ~800gph with this pump.

Now here is my question: Is it better to go to a larger diameter pipe between the return pump and the return bulkhead on the tank? In other words, should we go from 3/4" to say 1.5" for 10 feet or so and then back down to 3/4" to enter the tank. Will this help significantly with head loss? Or should we just go with 3/4" pipe the whole way?

 

[KAS]

In case you're wondering, we have read that there is significant head loss due to friction with smaller diameter pipes. It appears with a straight horizontal flow for 10 feet, there is an additional 4 feet of head loss with a 3/4" pipe vs, a 1.5" pipe.

 

[KAS]

bump

 

[NateHanson]

When I was designing my basement sump with that same pump, I decided that there was a big gain in flow with 1" return hose, and less of a subsequent gain going to 1.5", so I think I'd do 1" if it were me.