Locke Well & Pump Company

I have your Stenner 85MHP5. I run it around 50-75% 6 hrs. a day pumping 6% chlorine. My ambient temps are about like yours. Any idea what the pump tube life will be? How can I tell when to change it other than a ruptured tube?
Thanks

Pump tubes should be changed yearly , along with the duckbill in the ejector