new pump and plumping

Hi,

I just bought a Mag 9.5. The outlet is 3/4" and I bought the PVC coupling to make it 1" for higher return flow(right?). I am gonna do the plumbing tomorrow and I was wondering should I do get a ball valve to control the flow back to the sump? or I really don't need to spend those extra money/work?

Thanks!
GKW

 

You definitely do not want to control the flow rate back to the sump. You will overflow your aquarium. The ball value would go after the pump on the return line. I’m not sure about the mag drives but you will need to check with the manufacture to make sure you can throttle the flow rate or you might burn up the pump.

 

actually, i am gonna Tee off the return for water change. thanks!

 

Yes a Mag 9 can be throttled back and I would recommend adding it. It will control your flow back to the tank. Just put it after the pump. Never choch a pump off prior to the pump

J

 

Aw, man....I did all the plumping with 1" PVC AND THEN I found out that using 1.5" is the minimum hose size that should be used for maximum flow. anyone know how far off the GPH would this make???

Thanks!

 

according to a chart i found at http://www.watertreatmentforyourhome.com/aboutflowrates.html
the maxium flow rate for 1" PVC = 18GPM * 60 = 1080GPH
the maxium flow rate for 1 1/2" PVC = 44GPM * 60 = 2640GPH
I dont see a problem with your 1" plumbing.

 

man....that's a big different. could of use one less powerhead....o well. maybe i will do over when i have to take it apart (knock on wood) .

thanks!