Watts 500800 Premier Hot Water Recirculation Pump, Blue Review

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(More customer reviews)I don't know why few stores carry this and few people are aware of this great product, including those sales persons in home improvement stores. It gives instant warm water to all the rooms in your house, it saves 10,000 gallons water a year (really, I measured and calculated) and it is so easy to install.
Doubt about if it really works? Try this: go to the farthest faucet in your house and open the hot water. Once the water becomes hot, close it, but not fully, leaving a very small stream. Now go to other faucets and open hot water, you bet, instant hot water! It'll keep this way as long as you keep that small stream flowing.
The problem is that small stream goes wasted. How about recycle it into the hot water heater? Sure, but how? The hot and cold water lines have the same pressure, therefore water cannot go from the hot line into the cold line. What if I add a pump into the hot line? Exactly, that's what this Watts product does. Problem solved.
For a practical and fine product, Watts also add a temperature sensor, so the recirculation only happens when the hot line becomes not so warm. This, plus the stream is really small, adds very small extra energy cost to the heater.
The pump is very small, only 25 watts, using less electricity than a lighting bulb. There is also a 24-hr timer (in 15-minutes increments), allowing you to shut the entire system off during the periods when you do not use warm water, such as sleep and work times. This reduces even further the already very small added energy cost. BTW, the pump is thoroughly quiet, no audible noise at all.
An alternative product is the Laing Autocirc. It is a single piece can all be installed under a sink, could be a better choice for some people. The downside is you need (to add) a AC socket there to power the pump. The upside is the pump does not operate continuously like the Watts; it is controlled by the temperature sensor and thus turns on only when water becomes not so warm. Might save some more Watts than the Watts. Both are available in Home Depot stores.
I cannot think of a single reason not to install such a system into any house. Instant hot water without any side effect or significantly added extra energy cost and saving tons of water each and every year. I wish I have done this long ago and this product will be more widely spread.
PS, a tip: before you start the installation, go to Rite Aid or alike store and buy a pack of Hose Washers for $0.99 (e.g. Plumb Craft by Waxman, 74-114, 6 pieces). After you unplugged the hose from the heater and before you plug it to the pump, you should remove the old washer and use 1 or, if the old one is very thick, 2 of the new washers (I had to use 2). The old washer was usually hardened by the high temperature; if you don't replace it, it will leak water. The menu does not mention this, so I learned this the hard way. BTW, hey Watts: for a $200 product, such washers should have been included.

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Whole House Hot Water Recirculating Pump, Recirculating Pump Mounts To The Hot Water Outlet On The Water Heater & The Sensor Valve Mounts Under The Furthest Lavatory In The House Run, Turns Plumbing Into A Re-Circulating Loop, Every Faucet Will Have Hot Water Instantly, On/Off Timer On Pump Activates The Pump When You Need Hot Water, Saves Over 10,000 Gallons A Year In Wasted Water, 120V Pump Motor With 10' Grounded Plug, Easy To Install.

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