does up sizing return pipe help?

[mikesin]

im in the planning stage of moving my sump to the basement and using a mag 9.5 to return the water. this pump has 3/4" outlet. the aquarium return is 3/4". would there be any benifit to upsizing the pipe between the pump and tank which will be 9' or 10' run?
thanks

[detroit_fan]

yes, the bigger the pipe the less restriction and added flow. here is the head loss calc-

http://reefcentral.com/calc/hlc2.php

A mag 9 with 10ft head with .75" pipe is 330goh, with 1.5" pipe it's 405gph.

[Phyxius]

I believe Mag actually recommends upsizing the pipe size if I remember right. Its been awhile since I used one but I think the included literature said something about it.

I used larger pipe on my 9.5 I had before upgrading to a Eheim on my old 90g system

[mg426]

Larger Pipe will provide an increase in flow.

[mikesin]

Thanks for the replies - I was thinking up sizing the piping would not matter due to the 3/4" restrictions @ the pump and at the DT.

[chops29]

Yes, but wouldn't upsizing your pipe cause increased beck pressure do to a larger water content?

[DPalm3]

i think there is a good medium between resistance and back pressure. you'll have to consider that too wide of a pipe with slow flow and too thin of a pipe will slow flow

[Reefer08]

How do we upsize the pipe? I have a MAG7 which is 3/4th inch outlet but I have a 1 inch tubing attached to it. Is this what everyone is talking about?

[sjm817]

Larger pipe = more flow. Smaller pipe = less flow.
Yes, use whatever adapter to upsize the pipe that works for the application.

[just dave]

<a href=showthread.php?s=&postid=15178777#post15178777 target=_blank>Originally posted</a> by chops29
Yes, but wouldn't upsizing your pipe cause increased beck pressure do to a larger water content?

No.

[gooyferret]

The new Mag 12 that I purchased didnt say anything about upsizing the pipe in the instructions....For pump returns with Megaflows or 3/4" bulkheads it would be kind of pointless to use a 3/4" from the pump and upsize, then decrease again at the bulkhead??

[tank o tang]

goffy, you will have 2 3/4" returns.

[sjm817]

Loss is cumulative. Bigger pipe helps (a lot) despite discharge size and bulkhead size. You can also upsize above the bulkhead.

This is from the Mag9/12/18 instructions. Note the plumbing size.
http://i15.photobucket.com/albums/a370/Cheerleader555240/mag-1.jpg

[dj9264]

<a href=showthread.php?s=&postid=15178813#post15178813 target=_blank>Originally posted</a> by DPalm3
i think there is a good medium between resistance and back pressure. you'll have to consider that too wide of a pipe with slow flow and too thin of a pipe will slow flow

How does wider pipe slow the flow?