Let’s Evaluate Hot Water Recirculation Systems

Metlund’s product, uses your existing water pipes and requires the pump and valve to operate together under the sink (which creates a secondary requirement for electricity under the sink where there is not usually an outlet) and is difficult to install. In addition, it requires the user to activate it to call for water – in residential applications this will typically be a pushbutton. Unfortunately, the consumer must first push the start button to cycle the water (which is often not near the fixture desiring hot water…dishwasher, washing machine, 2nd bathroom and etc.). The pump life is estimated at only 2-years.

Laing’s product uses a similar concept – creating a recirculation loop using existing hot and cold water pipes and a pump. Laing’s pump turns on automatically whenever the hot water cools below a pre-set, non-adjustable temperature. The pump is also located under the sink (which creates the requirement for electricity under the sink where there is not usually an outlet) and is difficult to install. When operating, the pump completely fills the cold water lines with hot water, limiting the ability for the consumer to prevent scalding by adjusting the final water temperatures (mixing cold water to the hot water). The pump life is also estimated at only 2-years.

Grundfos’ product also uses a similar concept, using your existing water lines, a bypass valve and pump (located at your water heater) with a timer to control water flow. The bypass valve has a pre-set, non-adjustable temperature setting (which also doesn’t allow the consumer to adjust the temperature to meet specific needs). Grundfos’ product will not provide instant hot water other than when the pump is running and is difficult to install (requiring electrical connections and pipe cutting and soldering at your water heater). When operating, the pump completely fills the cold water lines with hot water, limiting the ability for the consumer to prevent scalding by adjusting the final water temperatures (mixing cold water to the hot water). The pump life is also estimated at only 2-years.

The Hot Water Lobster Instant Hot Water Valve uses an eco-friendly innovative and patented method of hot water recirculation. It uses your existing water pipes and the thermal convection generated by your water heater to circulate the water back to your water heater for reheating (not requiring a water pump or any electricity). This automatic recirculation can also prevent pipe freezing. This system has a temperature-controlled valve that allows the consumer to easily adjust the temperature control knob to meet their particular needs. There is no water waste with this type of system, and it also minimizes energy waste since it only re-circulates water when the hot water at your faucet cools below your desired temperature. Installation is a simple D.I.Y., 15-minute project (not requiring a water pump, any pipe cutting, soldering or electrical connections). The Hot Water Lobster Instant Hot Water Valve also has a 10-year warranty.

Prevent Your Pipes From Freezing:

The best solution to preventing your pipes from freezing is to simply install innovative and patented technology known as a “temperature controlled hot water recirculating valve” (is a breeze-no pipe cutting, soldering or electrical connections). It uses your existing water pipes and the thermal convection generated by your water heater to circulate the water back to your water heater for reheating (not requiring a pump or any electricity). These systems are temperature-controlled and are easily adjustable to meet your particular temperature needs. There is no water waste and it also reduces the energy required to heat your water while it provides instant hot water to your faucets and showers. A trickle of water circulating in your pipes will keep your pipes from freezing in most circumstances.

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