Overflow Question

[The Grizz]

With a CPR overflow box do not exceed the flow rating of the box with a bigger pump, it will literally overflow. As for the gate valves they go in the line going to the sump, just above the sump. This will help you control the level in the box so you don't get that sucking noise. Also if you go with a CS 102 that is rated for 1200 gph and a pump that is only rated for 900 gph you will need a gate valve to slow down the flow form the box to the sump in order for the pump to keep up.

Hope that makes sense.

[Maverick00]

Originally Posted by The Grizz

With a CPR overflow box do not exceed the flow rating of the box with a bigger pump, it will literally overflow. As for the gate valves they go in the line going to the sump, just above the sump. This will help you control the level in the box so you don't get that sucking noise. Also if you go with a CS 102 that is rated for 1200 gph and a pump that is only rated for 900 gph you will need a gate valve to slow down the flow form the box to the sump in order for the pump to keep up.

Hope that makes sense.

yeah that makes sense, thanks, the more i thought about it thats what i figured you meant.


@axe_man16 - Ive read numerous threads on various forums debating these two overflows which actually confused me even more. Ive read that even u tube setups can eventually have an air bubble buildup causing them to fail? Even if the airpump on the cpr failed wouldnt you have time to notice a slight air build up between the siphon?

[The Grizz]

I ran a CPR 102 on my 65 gal hex without an issue. If the power went out return pump stopped. When power came back on return pump and airlifter kick in and kept on working. I live in the country so power flicker often.

Best way to test for tempered glass is polarized glasses and a laptop. Laptop needs to be at a 45 degree angle to the glass. If all you see is a TOTALLY BLACK screen, not tempered. If there are white streaks in the black it's tempered.