Mag 9.5 Head Pressure Question

[woodycb]

I am putting a sump in my basement and I have a mag 9.5 for the return pump. I am going to be pumping about 10 or 11 feet up to the main floor. I believe the outlet is 3/4". Should I decrease the pipe size, increase it or leave it the same. I figured the bigger the pipe is, the harder the pump is going to struggle pushing all that water up 10ft. Not very familiar with the mag pumps just need some input.

 

[areze]

nope doesnt work like that, head loss is head loss. a larger pipe will always allow more flow with less resistance no matter what. I am not so sure about a mag 9.5 pushing 10-11 feet though. they arent the highest pressure pump in the world.

make sure you check a flow chart on them to be sure they will get you what you need.

 

[aninjaatemyshoe]

You will not be able to pump 11 feet with a Mag 9.5 using 3/4" pipe. It is way too restrictive in terms of flow. You'll need to plumb it to at least a 1 1/2" pipe in order to get it to that height. According to its specs, you will get 300 gph at such a height, but that is without factoring in pressure loss due to flow resistance from the pipe. Figure that for ever bend in the piping you loose about a half foot of head pressure (assuming you use nice large piping). You will also loose pressure at the outlet if you choose to use smaller piping, or loc-line, or a nozzle. In the end, I think you'd be lucky to get 100 gph and you might stress the pump too much. I think you'll need at least a Mag 18 to get good flow from this. Personally, I would look at other external pumps for this application.

 

[leebo_28]

it's not going to work pushing water that high. you may get a trickle but I doubt it...I have a mag 5 with four elbows going six inches(closed loop) and it is lousy. absolutely no pressure at all

 

[woodycb]

Thanks everyone, I got the pump at a great deal. Couldnt pass it up.

 

[leebo_28]

it will come in handy for something ...no worries!

 

[jduck]

It will come in handy for water changes. Get a dolphin/blueline or Iwaki Pump