11 Easy Steps to Install Hot Water Recirculation Pump – In-Depth Guide

A hot water recirculating pump can be used to provide instant hot water to showers and faucets whenever it is required by the homeowners. Hot water systems help you prevent water drainage while you wait for it to get hot.

There are a lot of ways to install hot water recirculation pumps and it can be a lot tricky for a new person to opt what method would be best and easiest for them to follow. Not to worry anymore as we have taken this responsibility for you.

Unlike other systems, this one doesn’t require a dedicated hot water loop and it works by means of a hot water circulating pump installed above the water heater and a check valve that is installed near the sink and away from the water heater.

The check valve enables the water pump to circulate the water towards the water heater until it is hot enough and shuts off after ensuring the water is warm enough for domestic use.

In addition to the hot water kit, which includes a hot water recirculation pump and the check valve, you will need a pair of flexible supply tubes and a few common tools. Most of the instant hot water recirculation pumps are simple to install and can be fitted in a couple of hours.

You have to follow the below simple steps:

Step 1: First, you need to shut off the water running through the cold water pipes into the water heater. The valve is usually on top of the heater. Before moving ahead, make sure that the flow of hot water is completely at a halt. Open the hot water faucet anywhere in the house to make sure hot water is stopped. If the shut-off valve has not completely halted the hot water flow, you may need to cut off the main water supply of the house.

Step 2: Now, disconnect the flexible supply line on the hot side of the water heater. Make sure you have a rag at your disposal to clean any residual water that comes out when the flexible water supply line is disconnected.
Note: You may not have flexible supply lines but rigidly fixed water pipes, in that case, the process becomes a little trickier, but it is possible.

Step 3: Set the timer of the pump according to when you need hot water the most in the house or if it has heat sensors, it can work automatically too. It may be a good idea to set the timer before installing the pump because it could be difficult to access it once it is installed.


Step 4: Adjust the pump on the hot side of the water heater by screws or holders. Before tightening it, make sure the timer is facing a direction that is easily accessible. Make sure to bind the threads of water heater nipple but if there is a rubber gasket inside the female nut of pump fitting, that won’t be required either.

Step 5: Now, reconnect the hot water pipeline on top of the hot water recirculation pump and tighten it with care. You can also loop the flexible pipeline if necessary but make sure there are no kinks because kinks will restrict the flow of water through the pipeline.

Step 6: Now, you need to point out a sink that is farthest from the water heater to install the check valve there. Shut-off the water to the faucets by closing both supply valves controlling both cold and hot water supply tubes.

Step 7: Disconnect the faucet supply tubes from shut-off valves under the sink. You must have a rag and a container to enclose the water that may drain when the supply lines are disconnected. Now connect the check valve to the faucet supply tubes.

Step 8: Screw the existing supply tubes coming down from the faucet on the top two outlets on the check valve. Fix the hot water line on the left side while the cold water line on the right side. Make sure you have correctly positioned the hot and cold water lines.


Step 9: Run the new water supply lines from the check valve towards the hot and cold water shut-off valves. The hot water pipe will be on the left while the cold water line will be on the line. Make sure, they are connected to correct valves. If this isn’t the case, you will need to make some tweaks to the system.

Step 10: Mount the check valve to the wall using the screws provided in the kit and make sure the new supply lines are tightly and properly connected.

Step 11: Turn on the water supply on both the faucet and the water heater. Run water on the farthest sink faucet to make sure all of the air is out of the pipelines. Analyze and observe the entire system, make sure there are no residues and leakages through the pipelines and the entire system. After satisfaction, plug in the power supply and start enjoying your brand hot water recirculation pump system with instant hot water output.

Note: If you ever require to shut-off the main water supply of the house for any purpose like we did above, make sure you have turned off the electric supply of the hot water recirculation pump and unplugged the connection to ensure it doesn’t burn out. The pump needs to have water circulating through it, to keep it running.

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