Closed Loop

[kjhnstn]

Can I make an over the back closed loop? Something like a canister filter but with the pump replacing the canister.

Keith

[james3370]

doing one on my build. check the build thread. (1) input tube beside the overflow box & returns are over the top to the 4 corners of the tank w/ loc-line

[OkR33Fer]

Absolutely, you just need to make sure the pump you use is self priming.

[james3370]

<a href=showthread.php?s=&postid=14977509#post14977509 target=_blank>Originally posted</a> by OkR33Fer
Absolutely, you just need to make sure the pump you use is self priming.

i added a filling port to the suction line of mine :) you can see it on the pipe that runs at a 45 degree angle (clickable thumbnail pic below)

http://img.photobucket.com/albums/v501/james3370/tank/29%20build/th_CIMG1816.jpg (http://img.photobucket.com/albums/v501/james3370/tank/29%20build/CIMG1816.jpg)

[stugray]

http://reefcentral.com/gallery/data/500/60772125_CL_back.jpg

More pics in gallery.

Stu

[kjhnstn]

Thanks Guys. I didn't think it would be a problem but being new I wasn't sure.
James, I was planning a fill port as well.
I'm thinking 1" suction to blue line 70 pump, then 1" return to a manifold system on the tank bottom.

[kjhnstn]

Oh, I forgot to ask, when figuring out head pressure loss on a manifold system would I need to add all elbows,tees, and nozzles on the manifold itself?

[james3370]

if it is the closed loop pump, i think i read that there is no head pressure since it is a "closed" system, there is no pressure differential between the intake & exhaust sides of the pump....but don't hold me to that LOL

[sailoracu2]

Melevsreef has step by step instructions. http://www.melevsreef.com/closedloop.html

[das75]

<a href=showthread.php?s=&postid=14979440#post14979440 target=_blank>Originally posted</a> by james3370
if it is the closed loop pump, i think i read that there is no head pressure since it is a "closed" system, there is no pressure differential between the intake & exhaust sides of the pump....but don't hold me to that LOL
no head loss on a CL but there's still pipe and fitting losses

[therealfatman]

Yep, just friction losses from pipe, fittings, valves etc. No static head losses. Theoretically.