The benefits of hot water recirculation are rather obvious. You get nearly instant hot water, which is convenient, and you save a substantial amount of water.
There are a number of types of recirculation systems for residential plumbing. There are the traditional full-time circulating systems that continuously pump a small flow of hot water through your plumbing (piping from the heater to the fixtures and back to the inlet of your heater). This type of recirculation system is wasteful of energy (running continuously). And remember that any system, which requires electricity to operate, makes installation a lot more complicated.
There are ways to reduce the energy loss such as putting the water pump on a timer to reduce the number of hours it runs. The downside to this is that if you want hot water when the system is off, you will still have to wait for hot water and you will still run a lot of water down the drain.
Several manufacturers offer a pushbutton to operate the water pump (also known as “Demand” systems) which do save water, but you still have to wait for hot water (and installation is quite difficult requiring not only electricity to operate the water pump, they often require wiring a pushbutton at each location instant hot water is desired).
The best of all worlds is a new innovative eco-friendly and patented technology known as a “temperature controlled hot water recirculating valve”. The “Hot Water Lobster Instant Hot Water Valve” 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). To save water and save energy, this hot water recirculating systems has a temperature-controlled valve that allows the consumer to easily adjust the temperature to meet their particular needs. There is no water waste as it reduces the energy required to heat your water while it provides faster hot water to your faucets and showers. Installation is a simple DIY project (no pipe cutting, soldering or electrical connections).