New tanks

[Ibn]

It's comparable to the Durso standpipe if you're comparing the two. Have to modify it a tad to bring the water level up a bit higher in the back of the overflow box. Most of the noise is coming from the sump end of it.

 

[PhotoByMark]

I've used the CPR overflow (CS 90) before so I'll add some comments in that regards. The pump is actually only needed to get the siphon going. It's hard to see it, but there's a nipple on the top of the box. What the pump is used for is to suck air out of it and draw water in to get water going. Once that's done, you no longer need a pump. I didn't even go through the trouble of using a pump; I just manually did it.

You also do not need to go with a Durso with the overflow box. There's a bulkhead in the back which can feed directly into the sump.

BTW, the linked picture is actually backwards. The right side of the picture is what goes into the tank and the left side is on the outside. You can see the bulkhead easier at that angle though.

OK - That makes sense as far as the vacuum pump - pretty cool!

 

[PhotoByMark]

It's comparable to the Durso standpipe if you're comparing the two. Have to modify it a tad to bring the water level up a bit higher in the back of the overflow box. Most of the noise is coming from the sump end of it.

I just pack around the drain tube with bio-balls and filter fiber and makes it a whole lot quieter.