I've been struggling with a Jandy SWG system for the last nine years. I have replaced several circuit boards, flow sensors and cells during this period. I have found the Jandy SWG system to be unreliable and expensive to fix. To make matters worse, Jandy technical support is unwilling to assist homeowners to diagnose problems and simply tells you to call a pool professional. With each Jandy replacement part that I purchased, I kept getting closer to pulling the trigger on a Stenner pump. This spring, the cell failed again and I decided to scrap the SWG and install a Stenner system.
I decided on a 17GPD @ 100 PSI Stenner model 85MPHP17 mounted on a Stenner 30 gallon gray tank. I priced out the system through Locke Well & Pump ($565.49) and Chem World ($615.59). I then found a sister site to Chemworld called boilerandcoolingwater.com and got the same package for $498.17 including Fedex home delivery. I ordered from them on Memorial Day, the package shipped the following day and arrived on my doorstep the very next day. My advice to anyone pricing out pump is to go to Stenner Build Item Number and then do a Google search using the complete item number.
I installed the system last weekend which involved removing the SWG and doing some piping modifications. The most difficult part was digging a trench for the power conduit between my power center and the Stenner pump location. I have an electrical background so the wiring part was easy. I had a spare 2-pole relay in my Jandy power center which I wired to the load side of the pump relay. This is a safety measure to ensure that the Stenner pump can't run without the filter pump running. After the installation was complete, I dumped 12 gallons of 12.5% shock into the tank and ran a 60 minute test pumping into an empty bleach container. The 17 GPD pump has a +/- 2% accuracy which equates to 88.9-92.5 ounces per hour. My 60 minute test resulted in 106.25 ounces which equates to 17.2% above the rated capacity. I called Stenner technical support and was told that the discrepancy is probably due to the pump tube and that I should replace it with the spare that was provided with the pump. I decided that the flow rate really didn't matter as long as I knew the actual rate.
Now here is the cool part. Last night, I waited until the sun set and ran a FAS-DPD test using the 25mL sample size which uses 0.2 PPM per drop. This test resulted in FC=6.8 and CC=0.2. I then ran the Stenner pump for exactly 1 hour and waited for another 15 minutes for the water to circulate. I used Poolmath to determine that at my tested injection rate of 106.25 ounces per hour it should raise the FC by 5.8 which when added to my tested 6.8 should result in a FC of 12.6. I then ran a second FAS-DPD test using the 25mL sample size and got FC=12.4 and CC=0. I can't believe that the tests show a 0.2 PPM difference between what I calculated versus the actual test!
Thanks to all of the prior Stenner build posts for giving me the knowledge of how to do this. I'd be happy to answer any questions about my build.
I decided on a 17GPD @ 100 PSI Stenner model 85MPHP17 mounted on a Stenner 30 gallon gray tank. I priced out the system through Locke Well & Pump ($565.49) and Chem World ($615.59). I then found a sister site to Chemworld called boilerandcoolingwater.com and got the same package for $498.17 including Fedex home delivery. I ordered from them on Memorial Day, the package shipped the following day and arrived on my doorstep the very next day. My advice to anyone pricing out pump is to go to Stenner Build Item Number and then do a Google search using the complete item number.
I installed the system last weekend which involved removing the SWG and doing some piping modifications. The most difficult part was digging a trench for the power conduit between my power center and the Stenner pump location. I have an electrical background so the wiring part was easy. I had a spare 2-pole relay in my Jandy power center which I wired to the load side of the pump relay. This is a safety measure to ensure that the Stenner pump can't run without the filter pump running. After the installation was complete, I dumped 12 gallons of 12.5% shock into the tank and ran a 60 minute test pumping into an empty bleach container. The 17 GPD pump has a +/- 2% accuracy which equates to 88.9-92.5 ounces per hour. My 60 minute test resulted in 106.25 ounces which equates to 17.2% above the rated capacity. I called Stenner technical support and was told that the discrepancy is probably due to the pump tube and that I should replace it with the spare that was provided with the pump. I decided that the flow rate really didn't matter as long as I knew the actual rate.
Now here is the cool part. Last night, I waited until the sun set and ran a FAS-DPD test using the 25mL sample size which uses 0.2 PPM per drop. This test resulted in FC=6.8 and CC=0.2. I then ran the Stenner pump for exactly 1 hour and waited for another 15 minutes for the water to circulate. I used Poolmath to determine that at my tested injection rate of 106.25 ounces per hour it should raise the FC by 5.8 which when added to my tested 6.8 should result in a FC of 12.6. I then ran a second FAS-DPD test using the 25mL sample size and got FC=12.4 and CC=0. I can't believe that the tests show a 0.2 PPM difference between what I calculated versus the actual test!
Thanks to all of the prior Stenner build posts for giving me the knowledge of how to do this. I'd be happy to answer any questions about my build.