But doesn't a thicker water column mean your producing more head? from what
i'm reading your suggestion to potentially double the ouput pipe size. is
the pump has a 1/2 inch output shouldn't you use that all the way up?


"Marc Levenson" wrote in message
...
You want to use 1/2" unions to allow yourself the ability to remove the
pump for
easy servicing, as you do have to take it apart and clean it from time to
time -
or even replace it. Here's what one looks like, although typically white:
http://www.melevsreef.com/plumbing/pvc_union.jpg

This is screwed onto the OUTlet of your pump. Add a 1/2" nipple to it,
then
bump up your plumbing to 3/4" or 1" rigid pipe going up. You *can* use
flexible
tubing, but it can lose its shape and become oval, which reduces your
flow.
Avoid as many elbows and turns as you possibly can.

According to the included instructions with my Mag drives, you need to
double
the size of the outlet to get maximum flow. 1" would be ideal, and 1"
thinwall
would be even better. It is 7/8" ID.

If you go to a SCWD, you'll have to reduce it back down, and use hose
barbs for
connections. Here's a page of how I put together a closed loop with a Mag
5 and
a SCWD:
http://www.melevsreef.com/how_to_build.html

Marc



Dave wrote:

Hello;

I'm about to set up my first sump ... going on a 55 gal tank using a
Rainbow LifeReef slimline overflow box, with output probably to a SCWD
switching device.

I have a MagDrive 7 pump. This pump has a 1/2" FPT inlet and a 1/2"
MPT outlet. What fittings and hoses should I use?

3/4" hose pushed over outlet?

1/2" MPT x 1/2" barb on inlet? or 3/4" barb?

Thanks ... I'm a total newbie to aquarium plumbing!

- Dave

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