Plumbing question

[Outlaw]

So I am about to drill my 75 gal for a glass.holes 1500 overflow. As this box has 2 1.5" outlets, I was wondering if I can plumb them into one outlet of if that would be too much restriction. I plan to run 300-350 gal/hr through my sump.

Here is what I am thinking.

 

[redfishbluefish]

Right from the Glass-Holes instructions, "Do not combine dual drains."






What I did with my 1500 gph Glass-Holes was to run each drain to opposite corners of the sump/refugium. The left side chamber had a filter sock and skimmer. The right side was the refugium. The center section is the return section (that also has a biopellet reactor).

 

[Outlaw]

Cool thanks. I read that but wasn't sure if anyone had tried it, as I am not draining 1500gph.
So, it's not too much flow for your fuge?

 

[redfishbluefish]

Also, don't feel like you have to drop the lines straight down. I angled mine to the respective corners of the sump. Picture from the back of the tank:

 

[Outlaw]

Nice! I may steal your design! (Mine were just quick mock-ups)

 

[Outlaw]

What's the diameter of your return?

 

[dbl]

Control flow to refugium with ball/gate valve, just like in your second diagram. If you look closely, you can see a valve in RedFish's picture, behind his fuge light. I'm certainly no expert, but it's exactly how I plumbed mine.

 

[redfishbluefish]

What's the diameter of your return?

The return is 3/4 pipe fed by a MAG 9.5......that goes up to a tee (over the top of the tank) that feeds four "Y" LocLines.

Control flow to refugium with ball/gate valve, just like in your second diagram. If you look closely, you can see a valve in RedFish's picture, behind his fuge light. I'm certainly no expert, but it's exactly how I plumbed mine.

Again, Glass-Holes directions states that drain lines should not be restricted, including any valves. I put valves on mine to completely shut off flow if I needed to do maintenance. Those valves have never been turned since they were installed in 2008. At this time, I most likely could not shut them down if I wanted to.

 

[Outlaw]

Thanks for the great info. Much appreciated. Got the overflow installed, now to get a tank for the sump and plumb!

 

[jayhawk]

Great advice by the others. I am not sure how accurate your diagram is but I would add a few more unions to make sure the plumbing can be easily broken down for potential repairs. RedFishBlueFish's picture illustrated a good use of unions. I went from white pvc to red and having unions made it easy. Otherwise I would have white plumbing.

 

[Outlaw]

I certainly plan on unions for all lines.

 

[Outlaw]

Would you think a Mag 9.5 is too much return for a 75? Was thinking about a mag 7, but it has a 1/2" outlet and I was planning to run 3/4" return line.

 

[Outlaw]

Bought my PVC and various fittings. I noticed the unions have quite a large restriction in the center. Do you think this will cause any issues with flow?

 

[jayhawk]

Bought my PVC and various fittings. I noticed the unions have quite a large restriction in the center. Do you think this will cause any issues with flow?

I would factor it in when buying the return pump.

 

[phillrodrigo]

Do not combine them. I did it on my small tank figuring it would act as a vent and make it flow better. Which ever one doesn't have water going down it will have a insane loud air noise coming from it. I'm gonna re plumb the tank very soon because of it.

 

[phillrodrigo]

Mag 9.5 is what I run on my 75 2 returns on the 75 and one to a 20 gallon high which is on the far end from the mag pump. I had to turn it down alot on the 20 the 2 returns on the 75 are wide open