2 Peri Pumps using same feed line?

iReefer12 · Jan 9, 2020

I'm setting up a peri pump and a kalk stirrer to dose kalkwasser.

It's a long run from where the tank is to where the RODI reservoir sits. I'm wondering if I can make a joint in the RODI feed line that runs to the current ATO Peri pump, and both the ATO Pump and the Kalk doser can pull from the same line?

I've attached a drawing to better explain. I think this should work, but what am I overlooking?

theMeat · Jan 9, 2020

Don’t see a problem with that.

Do put check valves inline. One out of reservoir before tee, and one on each line after tee.

Also make sure where water exits tube into tank that it’s above water and hi enough that siphon doesn’t take over when pump goes off

Caravanshaka · Jan 9, 2020

No issue there. I don't think you need the check valves at all either with peristaltic pumps.

theMeat · Jan 9, 2020

Caravanshaka said:
No issue there. I don't think you need the check valves at all either with peristaltic pumps.

Then what would stop the pump from drawing from both directions of tee?

Caravanshaka · Jan 10, 2020

theMeat said:
Then what would stop the pump from drawing from both directions of tee?

Peristaltic pumps pinch the line when not in use, so cannot siphon when stopped. So if you’ve got 1 running, the other will be pinched so water cannot flow in that line at all. If both are running they are drawing fluid the same direction and will both be pulling water. Neither running and they are both pinched so neither line will have any possibility of flow.

theMeat · Jan 10, 2020

Yes that’s exactly how a Peristaltic/tube pump works. If it’s a two pinch pump than if/when it’s in the off position where it’s pinchers are just onto the hose on one side and just onto pincher on other side it might not be fully pinched. Check valve will cost 3-4 bucks and will do no harm