Acid pump options - DIY - Stenner - or? (settled on Pentair Acid Tank w/Pump)

santacruzpool

Gold Supporter
Feb 24, 2015
561
Santa Cruz, CA
I am part way through the installation.

I am hoping to finish it off today. I need to go to the hardware store to get a 2" Tee so I don't have to use the pvc saddle.

So far I have run into a few problems, but it is working and is just ready to be screwed down to my pad and the wires and hose all neatly tucked into place.

Here is my panel before the installation:

97342

My Jandy iAqualink panel has several open Relays - I at first figured I would use Aux 7 and hooked it up that way. During all of my programming it would never energize Aux 7. So I am not sure what that problem is (maybe I don't have an RS8). After resetting all of my Aux settings in the programming I finally switched it to Aux3 and it started to work correctly.

My second problem is that I wanted to wire the power supply up via the pump, so that it would only turn on when the pump was running as a safety backup.

Here is a drawing of what I was attempting to do. The red line shows the location of a the wire that I used to connect to one leg of the pump relay so that I could have the power supply get its power only when the pump was on. This went to the AUX3 relay and then to the power supply line and load contacts. Unfortunately this didn't work and caused th 240v pump circuit breaker to trip anytime the AUX3 relay was switched on. Since my drawing from a trusted electrical engineer showed it wired this way, and I also saw another version of this on a Pentair power unit in the thread linked earlier, I thought it should work...

I either wired it wrong and/or my circuit breaker can't handle the extra load of the small power supply and that is why it trips the breaker.

97343


In order to get it working and test everything I switched it out and wired it to the 20A 120v circuit that powers the Jandy panel. This goes through the AUX3 relay to turn the power supply on and off as needed. It currently works. One minute of pump run time puts out around 5oz of liquid.

As a precaution I set a 1 minute time duration limit for the AUX 3 relay via the iAqualink programming. This means that even if the pump is off for some reason (but scheduled to be on), and the Acid Pump schedule calls for the Acid Pump to run, it will only inject around 5oz of weak MA acid into the pipes - which should never be a huge issue. I am not sure it would ever happen...

I will post some pictures later today of the finished wiring and the installation of the tank. That is what I am off to do now!
 

santacruzpool

Gold Supporter
Feb 24, 2015
561
Santa Cruz, CA
I got the wiring all hooked up and now have to decide where to put the injection port.

97366

I spliced into the main Jandy circuit with a jumper and a wire nut.

My problem now is that I need to figure out the best place to plumb in the injection port. A 2" Tee is pretty big and I don't have much room before or after the SWG. I can fit in the saddle connector just before the SWG as shown below, but a 2" Tee will be tough to fit in there. Plus, it is pretty close to the SWG.

97372

I thought I could connect to the capped stub that is already there for solar we may never use...I could just cut down the capped pipe and put a new threaded cap on the end...

Anyone else have any other ideas?

Maybe thread right into an elbow with a tap, or put a 90 off of the valve and a end cap with a 1/2" threaded end?

Here is my best option so far:
97394
 
Last edited:

santacruzpool

Gold Supporter
Feb 24, 2015
561
Santa Cruz, CA
Bumping my thread to see if someone has any objection to my last picture - cutting off the end cap and adding the threaded cap I have sitting on the pipe?

Or am I better off just drilling and tapping into that elbow/tee junction area to add the injector?
 

trivetman

Bronze Supporter
Jul 14, 2017
166
Jenkintown, PA
Im not an expert but I don’t think you want to inject into a place the water isn’t flowing. If you inject into that end cap there is no flow - just water pressure pushing back against the injection point. Whatever you’re pumping (MA?) will not flow into the system but instead collect in that space.

I don’t have a great solution for you. That pic where you have the saddle connector gets flow but if proximity to the swg is a concern....
 

trivetman

Bronze Supporter
Jul 14, 2017
166
Jenkintown, PA
Third post the charm....are you planning on cutting the stub off? In that case I don’t think the flow is a problem...as long as you’re able to get the injector deep enough into the T. You might need to replace some of the fittings to make that happen
 

santacruzpool

Gold Supporter
Feb 24, 2015
561
Santa Cruz, CA
I wonder if there is a threaded fitting that would go inside the 2" cutoff pipe?

If so I could cut off the pipe flush to the T and glue the fitting into the inside of the Tee with the short section of PVC pipe section is left inside the T.
 

Other Threads of Interest