Tunze DOC 9010 Skimmer hole ?

[sinz]

Hi,

I just installed my new Tunze DOC 9010 skimmer into my sump and today I noticed a hole in the back, water seems to be pouring out of it freely.

Not sure if this is by design or the hole is meant to be plugged ?

I have only had it running for about 12 hours so far and the foam hasnt risen in the collection cup yet, I have tried ajusting the air screw but that doesnt seem to help. I guess it could still be in the 'run in' period, however I am a bit worried about this hole.

See pictures:

 

[aurorahokie]

yes, it's supposed to be there, and water should be running out. You might want to make sure the air adjuster is almost all the way out. And it took mine 3 days to start skimming, but now it's running like a champ...

Chip

 

[sinz]

Thanks for that, there was no mention of the hole or its purpose in the instruction manual.

The foam seems to be rising now, the skimate is a lightish green colour. Seems to be working quite well.

 

[rvitko]

Yes, the hole is supposed to be there. The water acts as a seal to keep the air rising upwards and that is the height of the sealing column of water.