Overflow plumbing help

[trigger11]

Here are the specs
Used 200G acrylic tank - Center overflow with two holes drilled.
For the return I am coming up through one of the holes with 1 1/2 inch pipe.
I have a 2" bulkhead I am using for the overflow.
Would there be any issues with leaving all of the overflow piping at 2" when the return is coming in at 1 1/2? I plan on making a durso standpipe.
~Trigger

 

[al mc]

The difference in the diameter of the return versus the drain pipes should not. in itself, be a problem. All depends on how many gphs you will be pumping in versus how much water your overflow is capable of draining. I have a similar difference in pipe diameters and have no problem. I chose to have a 'T' off my return pump that allows me to divert some of my return flow back into my sump/refugium. This allows me to control the gphs into the DT to a point where my overflow is not overwhelmed.

 

[big]

Originally Posted by Al Mc
The difference in the diameter of the return versus the drain pipes should not. in itself, be a problem. All depends on how many gphs you will be pumping in versus how much water your overflow is capable of draining. I have a similar difference in pipe diameters and have no problem. I chose to have a 'T' off my return pump that allows me to divert some of my return flow back into my sump/refugium. This allows me to control the gphs into the DT to a point where my overflow is not overwhelmed.

I did the same thing with mind. Putting that Tee in lets you limit the flow or divert as much as you wish.

 

[trigger11]

Thank you both very much for the replies.
So, I will leave my overflow at 2" piping.
I do like the idea of putting that T" in there right after the return pump. So I am assuming you put in another one of those valve pieces with the red handle to adjust how much flow could go back to the sump/refugium? Can you tell why I am not a plumber? LOL