A hot water recirculating pump can be used to provide instant hot water to showers and faucets when it is needed most, without wasting water down a drain as you wait for hot water to arrive from the water heater. If you have a bathroom and shower located some distance from the water heater, you may find that you need to run the shower for 30 seconds or more before the hot water from the heater flows through the pipes and reaches the shower. Show With a recirculating pump installed, the water in the hot water line is constantly recirculating back to the water heater, which means that it is always warm and ready for use. There are several different designs for such systems, but the instant hot water recirculating system we'll show you here is possible to install in an existing system. WarningThis is not a project for beginners: The water may be extremely hot while you're completing the work, and various scenarios may arise that make completing this project difficult for those without plumbing experience. Work carefully and consider calling a professional if you encounter any issues. MechanismUnlike some other systems, this system requires no dedicated hot water loop, and it works through means of a circulating pump installed at the water heater and a check valve installed at the sink farthest away from the water heater. The check valve is a heat-sensitive valve that circulates water back to the water heater until it is warm enough, then shuts off when the water in the hot water pipes is warm enough for use. The result is that the water in the hot water pipes is always warm when you need it, and you never have to waste water down the drain as you wait for the water to heat up. While the recirculating pump does use a small amount of electricity, this energy cost is offset by the water you save. As an energy-saving feature, most recirculating pumps have a built-in timer that allows you to set the pump to work during the times of day when you are most likely to need hot water. You can turn off the pump at night, for example, when hot water isn't needed. Tools and MaterialsThe recirculating pump kit includes most of what you'll need, including the check valve and supply tubes that are installed under the sink.
Your recirculating pump will require a 120-volt outlet to plug it in. Make sure there is an accessible outlet near the water heater. Also, depending on the configuration of the plumbing pipes at your water heater, some plumbing work and additional parts may be necessary to install the recirculating pump on the hot water exit pipe on your water heater. This is most likely when the water heater is plumbed with rigid copper piping rather than flexible tubing. The Spruce / Kevin Norris Instructions
The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris The Spruce / Kevin Norris If you ever have to shut the water off to the house, make sure and unplug the pump to avoid burning it out. The pump needs to have water circulating through it whenever it is running. Should you experience a power outage, the timer on the recirculating pump will need to be reset in order to start and stop at the proper times. Can you put a recirculating pump on an electric water heater?To minimize water waste while waiting for hot water, you can have a recirculating pump installed on your water heater. These pumps return any unused hot water to your water heater to maintain its temperature while also sending fresh hot water to your faucets so that you don't have to wait for the water to heat up.
Where should a circulating pump be installed?Standard good practice among heating techs is to install the circulator pump on the return side of the loop where cooler temperatures can extend its life.
How does a recirculating pump work on a hot water heater?Full Recirculating Pump System
This system creates a loop from the water heater to the faucet and back again. The unused hot water is drawn back through this loop by the pump, so when you turn on your hot water faucets, you get hot water quickly.
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