Closed loop?

[droinablunt]

Can a closed loop be done without drilling for an intake?

maybe only some pumps can pull a suciton?

[IIOHAB]

Yes, You can place a suction line over the top. You will need to place a T with a pipe plug in the top side so you can prime the system before starting the pump. I will try and find a pic of my old one. Good luck

[IIOHAB]

The long end is the suction inside the tank.http://www.tcmas.org/forums/imagehosting/thum_6045eae6900d0b8.jpg (http://www.tcmas.org/forums/vbimghost.php?do=displayimg&imgid=34)

[JnS]

better to drill the tank IMO

but why not just use some power heads if you are worried about drilling.

[droinablunt]

Yes, You can place a suction line over the top. You will need to place a T with a pipe plug in the top side so you can prime the system before starting the pump. I will try and find a pic of my old one. Good luck

what if the power goes out?

[David Grigor]

I'm with Jerry. If you going to plan a closed loop, I wouldn't skimp.

Many have used siphon closed loops but the added PVC in your tank doesn't make sense as that is what most people are trying to avoid.

[IIOHAB]

If the power goes out the suction will not be lost as long as the h2o level does not get lower than the suction and return holes.