Suddenly, my Eshopps PF-1200 overflow box has suddenly developed a problem...

[Snoopy 67]

THE MOST IMPORTANT THING with overflow boxes is enough flow to pull all the bubbles out from the tube.
Otherwise they eventually fail.

 

[Dom]

THE MOST IMPORTANT THING with overflow boxes is enough flow to pull all the bubbles out from the tube.
Otherwise they eventually fail.

This probably explains why I have no issue with 1 tube.

 

[vlangel]

My drain line has (2) 90 degree turns. I may try using (1) 45 degree for a more direct path to the sump.

I was also thinking about going with soft tubing on the drain lines to make the flow more smooth.

I have my HOB overflow plumbed with flex tubing. I also have a reverse durso in the sump. It cut down on the noise a lot.

 

[Dom]

I have my HOB overflow plumbed with flex tubing. I also have a reverse durso in the sump. It cut down on the noise a lot.

I was looking at this barb for use with the box:

Schedule 80 Straight Barb x Female Thread

Barb/Insert x Female Thread. PVC Straight Insert Fittings for your plumbing needs. Use Schedule 80 Female Inserts where flexible turns and connections to fittings with male threads are needed. More professional look than white Schedule 40 PVC. The golden rule of plumbing is that every job...

www.bulkreefsupply.com

The bulkhead on the PF1200 is 1 inch. I don't want a barb fitting that will slip in, I want a barb that will screw on to the bulkhead. But I'm not sure what size.