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windcoast reefs 02-02-2011 12:20 AM

Sump piping
 
Hey everyone!

I am putting in a 20 gallon sump for my 33 gallon reef tank. I am really not sure what size pipe I should be using for the sump. I have decided on a Danner mag-drive 3 pump as my return from the sump to the tank. Any suggestions on pipe sizes?

The Grizz 02-02-2011 01:21 AM

Depending on what you are doing for an overflow you should have at least an 1 1/2" drain from tank to sump and a 1" return line.

windcoast reefs 02-02-2011 01:53 AM

Quote:

Originally Posted by The Grizz (Post 587333)
Depending on what you are doing for an overflow you should have at least an 1 1/2" drain from tank to sump and a 1" return line.

Really? Wow thats allot larger than I though I would need. It will be drilled, so there won't be any overflow boxes.

The Grizz 02-02-2011 01:57 AM

No internal overflow? I can't say I have seen that before, are you just going to have the pipe exposed and to the top level of the tank?

Aquattro 02-02-2011 02:02 AM

I use 1" on my dual durso and return, seems to give me lots of flow on my 180.
Before you buy anything, let me know what you need, I have tons of stuff that I need to get rid of.

e46er 02-02-2011 02:03 AM

3/4" return should be plenty for a tank that size

a 1" drain would be ok unless you plan on keeping large snails which could potentially block it

a mag 350 puts out ~ 200 GPH @ 6 ' head pressure so a 1" drain would have to be almost clogged solid to cause a flood
id drill 2 holes and do a herbie style overflow silent and virtually flood proof
return(s) over the back of tank

Binare 02-02-2011 02:05 AM

Quote:

Originally Posted by e46er (Post 587344)
3/4" return should be plenty for a tank that size

a 1" drain would be ok unless you plan on keeping large snails which could potentially block it

a mag 350 puts out ~ 200 GPH @ 6 ' head pressure so a 1" drain would have to be almost clogged solid to cause a flood
id drill 2 holes and do a herbie style overflow silent and virtually flood proof
return(s) over the back of tank

+1

golf nut 02-02-2011 02:07 AM

Quote:

Originally Posted by windcoast reefs (Post 587340)
Really? Wow thats allot larger than I though I would need. It will be drilled, so there won't be any overflow boxes.

All the more reason for taking Grizz's advice and go big, are you going to drill the bottom or the back?

e46er 02-02-2011 02:08 AM

you will need an overflow box of some kind to cut off a syphon if power goes out and when you shut off the return pump to do a water change

you could drill the bulkhead close to the top of the water level but you will need to make sure you have enough room in the sump to drain the display down probably 2 inches minimum leaving the 20 G sump to hold very little water
FWIW my 40 G sump only holds about 17-18 G of water and some sand and rock

Aquattro 02-02-2011 02:12 AM

You can drill the side and use a 90 as the overflow, but I would suggest at least a small box. Is it drilled already? I can give you lots of PVC, so use your money on a box :)


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