I replaced a Hayward unit that for one reason or another needed replacing every 2 years or so. This one is far beefier and appears better designed in every respect and is able to output more chlorine in less time. It is also drainable with the optional drain valve and can be charged with the pump running and can be drained in the winter so it does not have to be taken inside. Improve the tubing and this unit would be near perfect.