PVC overflow

First off, where'd all the trinis come from? lol

2. What's the barb and little tube do? let air out?

 

Big up to Trinidad.;D

you can attach the venturi inlet of a power head to the barb, using the hose. this would start the siphon and maintain it. it would also ensure that it restarts after a power outage. it would also remove air bubbles.

 

250gph is good, altough, I'd recommend a 350gph-400gph.

 

ok thanks. i was wondering did you make ur overflow to these same dimensions, same 3/4" pipe? if so, what kind of gph do you get? what is your return pump gph?

 

Yep. I have one made with 1/2" PVC and another made with 3/4" the return pump that I had on the 3/4" was a 400gph.
You can use a smaller pump like the 250gph you mentioned but I just always prefer more water circulation.

 

ok. i just didn't want a to powerful pump that would return more than the overflow could handle. it think i'll go with a 300/400 with a valve on the return.
did you use regular PVC glue, or is there something special that is reef safe?

 

I just did my plumbing with pvc glue, Everything is fine. (Plus I had done it in the past) I would say give it about 30 mins to dry.

 

ok thanks. i'm paranoid about things like that.

 

I was to I also asked lol

 

I finished building this overflow but i haven't set it up yet. i tested it out on a spare tank and it seems to be working. Here are some pics.

I couldn't find a barb so I used a air line hose connector. ( Thanks Siddique )



I used an end cap and drilled holes in it and the piece of the pipe that will be under the water level. This should create a skimming effect and prevent fish from getting into the overflow.



Finished product