Few small air bubbles. Okay?

[Fringe09]

Using the DOS & DDR for the very first time to dose calcium. Primed it yesterday and verified no air bubbles. Today morning I see a few small ones along the tube. Is this okay? If not, what do I need to do?

Here are a few pictures:

APEX_03.jpg

APEX_04.jpg

[twalton]

It's not disastrous, but check the compression fittings on the supply side of the peristaltic pump as well as the John Guest fittings on the DDR. It's likely either or both are leaking air.

[Fringe09]

It's not disastrous, but check the compression fittings on the supply side of the peristaltic pump as well as the John Guest fittings on the DDR. It's likely either or both are leaking air.

The tube from DDR to DOS doesn't seem to have any air bubbles. Coming out of the DOS, is where the air bubbles show up. I've re-tightened the gray nut. Let's see if that fixes it.

[rkpetersen]

You really need to have that tube pushed up onto the barb on the pump head as far as possible before screwing down the grey nut. And it's a good idea to retighten those nuts the next day and again a few days later.

[Fringe09]

You really need to have that tube pushed up onto the barb on the pump head as far as possible before screwing down the grey nut. And it's a good idea to retighten those nuts the next day and again a few days later.

Thanks for the tip. I'll try it.