Laing ACT-909 Tankless pump-No return line required Review

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(More customer reviews)This version of the ACT-909 is for retrofit installations. No return line needed.
I installed an ACT-909 a year or so ago, after we had a tankless water heater installed in the 3rd floor attic. Because it was inconvenient to install at the farthest location of the new part of our house, on the 2nd floor just beyond the shower, I installed it on the first floor beneath the shower. I don't know how our plumbing is run, but the ACT-909 works well in this configuration. The shower used to take a long time to get hot. Now it's hot within 5 - 10 seconds. We are happy.
The unit is completely silent and vibration free. I haven't bothered with the timer, so I am sure we are wasting money there.
I am buying a second ACT-900 for the old part of the house which has the same long lag in receiving hot water on the first floor kitchen.

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Laing LHB08100092 AutoCirc Recirculation Pump with Timer Review

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(More customer reviews)The kitchen sink is on the completely opposite side of our house from the water heater. It seemingly took forever for any hot water to get there. Now there is warm water instantly and hot water is just seconds behind. It has been extremely nice this winter, avoiding freezing water from the tap.
Cheaper recirculating pumps utilize a a plastic valve under the sink that will wear out and need replacement. The body of the valve in this pump is brass and looks like it will last for a very long time.

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The auto circpump is installed under the sink or faucet farthest from the water heater - wherehot water usually takes the longest amount of time to arrive. A built-in temperature sensor automatically turns the autocirc pump on when the watertemperature in the hot water supply line cools down to 85º F. This cool water in the hot water supplyline is then pumped into the cold water line and back into the water heater. The autocirc pump turns off automatically when the hot water supply line to the faucet reaches a temperature of 95º F, ensuring the instant availability of shower warm water with maximum temperature hot water only seconds behind. When the pump is automatically turned off by the built-in thermostat, an auto closure device prevents hot or cold water from mixing in either supply line.Another beneficial feature is that hot water will also be instantly available at all other faucets in the supply line between the water heater and the faucet where the autocirc pump is installed.

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LAING Autocirc Pump with Timer and Cord Review

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(More customer reviews)Installed this pump in three steps. First, installed a 115-volt outlet under the sink that was farthest from the water heater, a distance of about 50 feet. There were three other sinks and two showers all hooked to the hot water pipe that ran between this farthest sink and the water heater. Second, I insulated the hot water pipes leading from the water heater to this farthest sink. Most of these hot water pipes were located in a suspended ceiling. If the pipes were in a wall, I ignored trying to insulate them, figuring the wall was enough insulation. Third, I installed the pump under the sink. I set the timer to operate whenever I plan on using hot water in any of the sinks (i.e., 0600-2400). I have had the pump installed for about a year and appreciate it every day. When the water at the sink cools to 85 degrees, the pump cycles "on." When the water temperature reaches 95 degrees at the sink, the pump cycles "off." The water from the hot water side gets pumped to the cold water side so that the cold water is about 90 degrees, but that water cools rapidly. When the cold water faucet is turned "on," the cooler water quickly gets to the faucet. This pump is perfect for my needs.

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