PVC overflow question

new92 · 02/13/2008, 01:33 PM

I have a 75g DT with a 30g thats going to be a sump. I want to use the PVC as a type of coast to coast overflow that has been discussed here before. I like the low profiile of it and the (apparent) ease of construction. My question is:

What size of pipe should I use for the overflow and what size bulkheads?

I was originally going to do this on a 37g and use 1", but found a great deal on the new 75 and wanted to concentrate on that instead.

twok2lcdcnc · 02/14/2008, 12:02 AM

I'm building them for my 125, and have done some research... the consensus is that 2x 1" is good for ~1,500gph (and that's what I'm doing) I think you'd be safe with a 1x 1", but there are lots of advantages to running 2 of them. I'm not exactly sure what size you would use for that. Of course a lot of it depends on your other equipment/stocking list/etc.

There are people a lot more knowledgeable than I am about this, but I know these threads move fast so I figured I'd try to contribute something! Good luck.

new92 · 02/14/2008, 08:53 AM

ok, thanks

I have the hole saw to be able to cut the holes for 1" bulkheads already so I will probably just start there.

I just wasnt sure if it would be better to go to like a 1.5" overflow and hten reduce it down to 1" through the 2 bulkheads or do like 1.5" bulkheads. I am beginning to think that the 2 1" bulkheads with 1" overflow will work well enough though. I can always change it I guess if I need to, and it would be easier to go larger rather than smaller I would think.

Thanks for the bump though

02/13/2008, 01:33 PM	#1
new92 Registered Member Join Date: Jan 2007 Location: Middleburg,Jax,FL Posts: 48	PVC overflow question I have a 75g DT with a 30g thats going to be a sump. I want to use the PVC as a type of coast to coast overflow that has been discussed here before. I like the low profiile of it and the (apparent) ease of construction. My question is: What size of pipe should I use for the overflow and what size bulkheads? I was originally going to do this on a 37g and use 1", but found a great deal on the new 75 and wanted to concentrate on that instead.

02/14/2008, 12:02 AM	#2
twok2lcdcnc Registered Member Join Date: Dec 2007 Location: Cleveland, OH Posts: 51	I'm building them for my 125, and have done some research... the consensus is that 2x 1" is good for ~1,500gph (and that's what I'm doing) I think you'd be safe with a 1x 1", but there are lots of advantages to running 2 of them. I'm not exactly sure what size you would use for that. Of course a lot of it depends on your other equipment/stocking list/etc. There are people a lot more knowledgeable than I am about this, but I know these threads move fast so I figured I'd try to contribute something! Good luck.

02/14/2008, 08:53 AM	#3
new92 Registered Member Join Date: Jan 2007 Location: Middleburg,Jax,FL Posts: 48	ok, thanks I have the hole saw to be able to cut the holes for 1" bulkheads already so I will probably just start there. I just wasnt sure if it would be better to go to like a 1.5" overflow and hten reduce it down to 1" through the 2 bulkheads or do like 1.5" bulkheads. I am beginning to think that the 2 1" bulkheads with 1" overflow will work well enough though. I can always change it I guess if I need to, and it would be easier to go larger rather than smaller I would think. Thanks for the bump though