Closed loop question

[DJF]

I just put the down on a large tank and am engineering my filtration. The design I’m going with is a closed loop as well as an overflow down to a sump & filtration area. I have not dealt with closed loops before but was wondering if I can/should plumb the uv and chiller off the closed loop or keep it off of the return from the sump.

 

[AlexG]

For the UV I would recommend a stand alone pump as most UV sterilizers work with lower amounts of flow however you could manifold off of your closed loop. I do not have experience with chillers but if they have a recommended GPH of flow then the same rules would apply. I would also consider redundancy within your system to determine if sharing a pump between this equipment fits into your plans for the potential of equipment failures.

 

[DJF]

Thank you- that helps. I’ve realized it’s not the best idea because you lose the ability to vary flow throughout the day by using the pump.

 

[ca1ore]

Yes, pump ramping and you want to minimize the complexity as a leak in a closed loop line can be a significant problem.