Hi Jay,
I like what you are doing here. I'm wondering if you have done any research on the long term effects of bleach on your Shurflo transfer pump. I'm thinking about using that exact pump as a direct chlorine delivery pump, and it would have liquid chlorine in it 24 hours a day, instead of just doing short term transfers like you are doing. Just wondering how long it would hold up to the chorine before it starts to eat away at seal, etc.
You see, I currently have an automated chlorine feeder that monitors ORP, then fires a solenoid that releases DiChlor into a tank to chlorinate. I've been using it for 8 years, thinking it was a wonderful product. But, when I couldn't get my pool under control this year, I found my CYA was over 600 by using only DiChlor for all these years. So, my plan is to replace the solenoid with a pump that will dump in a few ounces of liquid chlorine, instead of DiChlor. This means the chlorine will always be in the pump, until the demand is needed.
I know my modification will do exactly what I want. I'm just not sure how the pump will hold up with chlorine always in it. Even if it gets eaten away in a few years, I wouldn't mind putting a $60 pump on every year or two. Right now, the DiChlor eats away the solenoid about every 3 years, and that is a $150 replacement. I know that I could use a peristaltic pump like the stenner uses, put those are low flow. The system only turns the solenoid on for 10 seconds to feed, and I want to pump in several ounces in that 10 second time. A peristaltic pump won't do that.
Sorry for the long explaination. I just wanted you to know why I was asking. Have you done any research that gives you an idea if the shurflo would hold up for me?