December 29, 2014
I'm not sure what the Laing AutoCirc 2 system is, but I bought the Watts 500-800 Whole House Instant Hot Water Recirculating System. Before installing the pump assembly, I installed the sensor valve kit, which came with the system, at the sink furthest from my hot water heater. The next day I had warm water at that sink as well as the intermediate locations without having to install the pump. Apparently the hot water was being circulated merely by convection (hot water being attracted to cold water through this sensor valve). The water isn't hot instantly, but it is warm and I get get hot water a lot faster.
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