Rola-Chem Tank Mounted System

[MaxAcceleration]

Wanting to switch to an automated chlorine feed system.

How does this Rola-Chem 543725 Pro Series Pump 12 GPD 15 Gallon Poly Tank Mounted System Tank look?

http://www.poolsupplyworld.com/Rola...llon-Poly-Tank-Mounted-System-Tank/543725.htm

Looking at page 7 here: http://www.rola-chem.com/manuals/522105-1-02-10-ROLA-CHEM-PUMP-MANUAL.pdf - 12 gallons per day seems like the correct size.

I'm assuming I just hook it up to the timer wiring, set the correct flow rate, then plumb into the return line - and done right?

Thanks in advance,
Jamie

 

[Isaac-1]

Looks interesting, but I suspect you will also need an external timer to improve control precision separate from you pump control timer as it looks like the onboard cycle length timer (X minutes out of every 10 or so) only has 7 steps ranging from .1 GPD to 12 GPD which seems way too course of steps to me.

Ike

 

[woodyp]

You can use the search function to find some nice threads on peristaltic pumps on this forum.

 

[MaxAcceleration]

Looks interesting, but I suspect you will also need an external timer to improve control precision separate from you pump control timer as it looks like the onboard cycle length timer (X minutes out of every 10 or so) only has 7 steps ranging from .1 GPD to 12 GPD which seems way too course of steps to me.

Since that .1 - 12gpd range is for a full 24 hours, if I only run my pump for 8 hours (I've been following the one hour per every 10 degrees rule) then that would change the values from .03 - 4gpd. I'd probably vary from the #2 setting of 1.2gpd (.4 gallons over eight hours) to the #3 setting of 3.6gpd (1.2 gallons over eight hours) depending on the temperature, pool usage, solar cover on/off, cya levels, etc.

Thanks,
Jamie

 

[MaxAcceleration]

You can use the search function to find some nice threads on peristaltic pumps on this forum.

Yep, been following the other threads, but was unable to find anything with this particular setup and unfortunately can't find any reviews on it either. It seems convenient to have the pump mounted to the container and I'm assuming it comes with needed connections. Just trying to find some faults with it before I buy.

Thanks.
Jamie

 

[Isaac-1]

My point is even with reduced 8 hour run time there is a big difference between .4 gallons of chlorine and 1.2 gallons per day, if we split the difference and say your pool uses .75 gallons per day normally, you are either going to be considerably under or over dosing each day and constantly turning the pump up or down, a better solution might be to have a second timer that runs the injection pump only for the first 5 to 6 hours of the filter cycle to achieve the .75 (or whatever it is in the real world) gallon total at the setting 3 rate. I find with my chlorine injection pump once I get into the middle of the swim season and the water is at a stable warm temperature I can get the injection pump timing tuned into the point where I only have to tweak it every 2 or 3 weeks, either through manual chlorine additions after big swim parties, or slight adjustment to the injection pump if FC is trending up or down..

 

[MaxAcceleration]

My point is even with reduced 8 hour run time there is a big difference between .4 gallons of chlorine and 1.2 gallons per day,

if we split the difference and say your pool uses .75 gallons per day normally, you are either going to be considerably under or over dosing each day and constantly turning the pump up or down, a better solution might be to have a second timer that runs the injection pump only

Ah, great point. And to your point, my chlorine demand might be totally separate than my need to cycle the water. What kind of timer did you end up using and how did you wire it into your existing system? Do you know if these pumps can be left outside in the elements? Does the CYA level become less important with a constant delivery system like this?

Thanks,
Jamie

 

[Isaac-1]

I am using an LMI diaphragm injection pump which has variable stroke length and digital adjustable injection frequency (ranging from I think 20 storkes per hour up to 1 per second), not a peristaltic pump so I have no need of an external timer on mine. The big downside to using a diaphragm pump is that over time the chlorine attacks the diaphragm which must be replaced at a cost of about $40-$50, failure to change the diaphragm can lead to chlorine getting into the workings of the pump ruining it. On average I find I must replace the diaphragm every 12-18 months when using 6% bleach, now that I have switched to 8.25% like just about everyone else, I am hopeful to get 12 months. Diaphragm pumps also have foot, inlet, outlet and injection valves that must be cleaned and rebuilt from time to time (about every 2 years).

Ike

p.s. specifically mine is an LMI A941-155S

 

[toofast]

I looked at the rolochem - but bought this 15 gal combo unit instead. Better price and very easy to use...hooked up a $15 outdoor digital timer.

http://www.stenner.com/prod-tanksys.htm

 

[JasonLion]

Rola-Chem dosing pumps are fine. However, I recommend Stenner. They costs a little more and have a better track record for reliability, so it depends on how big an issue that costs a little more part is for you.

 

[toofast]

Rola-Chem dosing pumps are fine. However, I recommend Stenner. They costs a little more and have a better track record for reliability, so it depends on how big an issue that costs a little more part is for you.

I actually paid less for my stenner/tank combo...maybe I got a crazy deal, but check it out for sure.

http://www.lockewell.com/index.php?main_page=index&cPath=1_6