Any comment on this Liquidator review found on amazon.com:
This system is designed to add chlorine before it enters the pool pump. Chlorine should never be injected in this suction side of the pump, because the concentrated chlorine will deteriorate all of the seals and the spider gasket on the multiport control valve of the filter. This will require replacement of these gaskets every 1-2 years. Although I have never owned this product, I did contact the manufacturer to give them a chance to respond to my concerns. They did not respond to date. I hope that HASA or anyone else can some day sell a Viton spider gasket to alleviate this problem. The other solution would be to redesign this product so that the chlorine can be injected into the return line going to the pool, as is the case with all other chlorination systems.