Stenner liquid chlorine pump - How to choose and install

bflauaus

Member
Apr 16, 2018
7
Spring
Has anyone here repurposed their puck feeder to inject chlorine bleach? I have a Pentair Rainbow Model 320. It seems feasible that a injection point could be added between the dial/controller and the body of the unit. Has anyone attempted this modification?
 

colonelkirby

Silver Supporter
Mar 20, 2017
34
DFW - Plano, TX
Has anyone here repurposed their puck feeder to inject chlorine bleach? I have a Pentair Rainbow Model 320. It seems feasible that a injection point could be added between the dial/controller and the body of the unit. Has anyone attempted this modification?
The inline model's body can be unscrewed from its T-fitting. I then re-purposed the T to attach the Stenner injection point. There is one gotcha though, there is a set screw in the vertical T component. Feel around under the feeder body to find it. Remove it before you unscrew the body so you don't wreck the threads.
 

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JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
16,674
Tucson, AZ
Has anyone here repurposed their puck feeder to inject chlorine bleach? I have a Pentair Rainbow Model 320. It seems feasible that a injection point could be added between the dial/controller and the body of the unit. Has anyone attempted this modification?
This is generally not suggested by TFP. Accidentally mixing bleach and trichlor can cause the buildup and release of chlorine gas and/or cause an explosive condition. If one were to modify the puck feeder in a non-obvious way to inject bleach and another individual was unaware of the modification, that person could be exposed to a very dangerous condition. It might be a low probability event, but modifying a product in any way voids the manufacturer’s warranty and liability and shifts all responsibility and liability to the person that modified it.

Basically, use a saddle clamp and find a different injection point OR remove the puck feeder altogether.
 
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jwfrank

Bronze Supporter
LifeTime Supporter
Oct 14, 2008
58
Todi, Umbria, Italy
Please forgive me if this has been answered. I am buying a replacement solenoid dosing pump for liquid chlorine injection. From years of experience, I know that I regularly use between 1 liter and 1.25 liters PER DAY to keep my free chlorine level at 2-3ppm which is fine for my pool. My question has to do with the SIZING of the dosing pump. My circulation pump runs 8 hours per day in 4 intervals. My old dosing pump runs on a timer which is activated when the circulation pump turns on . I control the amount of chlorine added by how long I have the dosing pump running, usually 1 to 2 minutes for each circulation pump interval. My question is which of the following models would be best to choose as a replacement. The 0110 model is closest to what I am replacing but since the circulation pump operates at a low bar, I am wondering whether the 0607 might be better suited. The dosing pump models shown can be adjusted to lower the “strokes” which would reduce the amount injected per “run”. (PS I live in Italy and hence the liters/hour etc.). I know that most of the models shown (on the left side of the graph) would work, but which would be best? Many thanks for your advice
 

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Steve_in_C

Bronze Supporter
Jul 6, 2017
354
Kinston, NC
Please forgive me if this has been answered. I am buying a replacement solenoid dosing pump for liquid chlorine injection. From years of experience, I know that I regularly use between 1 liter and 1.25 liters PER DAY to keep my free chlorine level at 2-3ppm which is fine for my pool. My question has to do with the SIZING of the dosing pump. My circulation pump runs 8 hours per day in 4 intervals. My old dosing pump runs on a timer which is activated when the circulation pump turns on . I control the amount of chlorine added by how long I have the dosing pump running, usually 1 to 2 minutes for each circulation pump interval. My question is which of the following models would be best to choose as a replacement. The 0110 model is closest to what I am replacing but since the circulation pump operates at a low bar, I am wondering whether the 0607 might be better suited. The dosing pump models shown can be adjusted to lower the “strokes” which would reduce the amount injected per “run”. (PS I live in Italy and hence the liters/hour etc.). I know that most of the models shown (on the left side of the graph) would work, but which would be best? Many thanks for your advice
Not being familiar with solenoid dosing pumps, I assume that you can set it down with a timer or some type of control. The lowest value listed for the models on your data sheet shows 1 liter / hour. Since your usage is 1-1.25 liters per day, I would think that the lowest volume model would work. But it's all dependent on the controls that you have. If you set this up, let us know how it works,, costs, etc..
 

b_hol

New member
Oct 13, 2019
3
Cypress, TX
Getting ready to start a new build of 25K gallon pool in Houston, TX. Would like to add 2 stenner pumps, 1 for chlorine and 1 for acid dispensing. Will be using Pentair VS pump, what model / size stenner pumps do you recommend?

I travel a lot for work and am gone for weeks at a time. I want to add the stenner pumps for automatic dosing as my wife will not be able to handle this duty.

Pool will be in full sun, with hardly any shade around.
 

Iam1964

Well-known member
Dec 26, 2019
77
Conroe, Tx
@b_hol i have a 10 gallon per day model with the 15 gallon tank and it seems plenty for my needs, probably yours too. I only use it for chlorine and currently I am running it in the morning for 13 mins and in the afternoon for 12 mins. It is keeping my chlorine levels at a very steady 6 to 6.5 ppm. I also calibrated the pump and my pump is actually flowing at 12.2 gallons per day.
 

b_hol

New member
Oct 13, 2019
3
Cypress, TX
Do you have the 45MHP10 adjustable head model or single fixed model? 25psi or 100psi max?

I was looking at the 45MHP10 , but didn't know if I would need the adjustable head. How is the tank holding up in the weather, did you get the gray UV or regular white tank?

Thanks
 

Iam1964

Well-known member
Dec 26, 2019
77
Conroe, Tx
Do you have the 45MHP10 adjustable head model or single fixed model? 25psi or 100psi max?

I was looking at the 45MHP10 , but didn't know if I would need the adjustable head. How is the tank holding up in the weather, did you get the gray UV or regular white tank?

Thanks
I bought the fixed head model as it seemed to be a bit easier to dial in, I also heard the adjustable head can be a little noisy. It is rated for 100 psi. The tank is the gray model and is pretty sturdy. I did build a box around it to keep it a bit more shaded. So far, I am more than pleased with It.
I am just south of Conroe if you want to check it out.
 

98chrysler

Member
Jul 29, 2019
16
DFW Texas
I run the 45MPHP22 100psi fixed head 22 gallons per day model for my chlorine injection. I run it for 18 minutes during the middle of my main pump run cycle and that's it. I started with the 3 gallons per day model and it seemed to run all day. (18 minutes vs over 2 hours) Now I get it in quick and be done. Less run time is less pump wear and less electricity. I use a Woods outdoor digital timer for control.
 

GoGrabTheNet

Well-known member
Dec 13, 2015
76
Surprise, AZ
I have run the 45MPHP10 model since October 2016. Lately, I have been on the cusp of going SWG. I seemingly burn through a lot of chlorine in the summer here in Phoenix. Last year, the pool consumed $241 worth of chlorine, which was a total of 36 gallons of 10%. That may be on par with a decent pool seaon; I don't know. All in all, in order to fight the solar burn-off, the Stenner runs 4x a day at 15 minutes.

It probably was mentioned before, but I will state it again: a Stenner pump or other means of chlorine injection still needs to be maintained. Being that I only have experience with a Stenner pump, I will say that it has been anything but headache-free. You must keep your eye on it! Set a calendar reminder on your phone to perform periodic and preventative maintenance. Of course, AZ is brutally hot in the summer and the sun is intense, but most of my failures below occurred in the "cool" season.

Over the course of ownership, I have replaced countless tubes (one of which downright split causing a disasterous low-chlorine situation in full Phoenix sun), countless ferrules, several duckbills, brittle sections of tubing (caused by the chlorine, not the sun), just replaced the roller head the other day, and so on. I've found that the tubes fail inconsistently. It may be a year, it may be 6 months. It could be 4 months. The failures may be in the form of split tubes or hardened tubes that may allow back-pressure (failed duckbill) to put water into the chlorine tank.

So all in all, if you go Stenner, keep your eye on the Dang thing!
 

jonpcar

Bronze Supporter
Jun 1, 2016
496
Gilbert, AZ
Has anybody used a stenner to pump a diluted acid solution into the pool to eliminate dosing by hand?
I think everyone who uses a Stenner to pump acid does this to some degree. Depending on your timer/controller, it can be easy/hard to do a manual dose. Currently I use a sprinkler controller to control my Stenner pumps (that will change soon with updates to my automation system). For me, I turn the sprinkler controller on manual mode and run the pump for TBD minutes. I put full strength 34% acid in my Acid tank. You obviously still have to deal with the MA when you fill your tank.
 

jonpcar

Bronze Supporter
Jun 1, 2016
496
Gilbert, AZ
Over the course of ownership, I have replaced countless tubes (one of which downright split causing a disasterous low-chlorine situation in full Phoenix sun), countless ferrules, several duckbills, brittle sections of tubing (caused by the chlorine, not the sun), just replaced the roller head the other day, and so on. I've found that the tubes fail inconsistently. It may be a year, it may be 6 months. It could be 4 months. The failures may be in the form of split tubes or hardened tubes that may allow back-pressure (failed duckbill) to put water into the chlorine tank.
Hey GoGrab...I’m pretty new to the Stenner pumps (almost 2 years for chlorine, 1 year for acid), and have been lucky with only one failure: a leak in a line...BUT I didn’t have the UV resistant black tubing at the time. I also replaced my dosing tube in my chlorine pump at this time last year. Do you have the black tubing?

On the brittleness, is that just for the tubing from the pump to the injection valve (which is higher pressure than the tank line)? I want to be careful to look for these failures. My system is pretty much entirely shaded so I am wondering if that might apply to my “luck”.

I haven’t had any ferrule issues. But I have worried about bending/pressure on those tubes which make tight turns right out of their connective points (at the pump or injection valve), could that be an issue?
 

Paulk

Silver Supporter
Oct 8, 2017
32
Berkeley, California
Hey GoGrab...I’m pretty new to the Stenner pumps (almost 2 years for chlorine, 1 year for acid), and have been lucky with only one failure: a leak in a line...BUT I didn’t have the UV resistant black tubing at the time. I also replaced my dosing tube in my chlorine pump at this time last year. Do you have the black tubing?

On the brittleness, is that just for the tubing from the pump to the injection valve (which is higher pressure than the tank line)? I want to be careful to look for these failures. My system is pretty much entirely shaded so I am wondering if that might apply to my “luck”.

I haven’t had any ferrule issues. But I have worried about bending/pressure on those tubes which make tight turns right out of their connective points (at the pump or injection valve), could that be an issue?
Yes, I'm interested also. I've only been running my Stenner pump for a year, and no problems whatsoever. I also have a completely shaded system, and less heat. I also don't use anything stronger than the 6% bleach. Can you tell us more about if the cracks are in the PVC or in the black tubing? Thanks for the heads up. I'll have to check it out well. Perhaps I should change the tube in the pump in this next week. And being in Northern CA, we didn't run our pool from October till May 15th. But I'm installing solar panels soon, to try to lengthen that time.
paul