DIY overflow

[Iheartwood]

I have been looking at overflow designs and reading about them and took all of tht in to my own. I made basically two 3/4 inch PVC over flows leading to one 3/4 tee. 3/4 PVC is rated for about 400gph so when I have two overflows that's 800 gph can a 3/4 inch tee handle tht or do I convert tht to 1 tht can 950 gph


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[rarecoral]

Nice

Nice

 

[Reefing Madness]

 

[c_healy]

Why not just do the whole thing in 1 inch and remove the second overflow. That's a lot more things that can go wrong having 2.


What size tank?

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[Reefing Madness]

I would not branch off into a 3/4" T. 1" pvc can handle 600gph.

 

[Iheartwood]

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[Reefing Madness]

Bet you get more flow using 2 seperate overflows, instead of them coming together.
Looks great though!!

 

[KJAG]

Overflows should be as close to a straight shot into the sump as possible. With dual overflows Id personally just run dual Herbies.

 

[redfishbluefish]

I have been looking at overflow designs and reading about them and took all of tht in to my own. I made basically two 3/4 inch PVC over flows leading to one 3/4 tee. 3/4 PVC is rated for about 400gph so when I have two overflows that's 800 gph can a 3/4 inch tee handle tht or do I convert tht to 1 tht can 950 gph


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I hate to tell you this, but you don't have 800 gph flow because you tee'd two 3/4 pipes into a single 3/4 drain pipe.....you still only have 400. You would need (common pipe sizes) the two 3/4 overflows connecting to a tee with a 1 1/4 to meet the drain capabilities of the two 3/4 pipes.

 

[Bartmmackey]

Why wouldn't you do flex?

 

[Iheartwood]

Yea I know I got my glows mixed up but everyone dong this type overflow connects at same size.... And I already glued it all together so...


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[Iheartwood]

Flows*



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[KJAG]

Also,a separate dry emergency standpipe is critical in case of a clog( plastic bag, fish, nem, etc.)
By connecting two overflows into a single drain you're doubling the point of entry for a flood risk.


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