How to Install a Hot Water Recirculator: Don’t Ignore Those Easy Steps


The hot water recirculating system can deliver rapid hot water supply to faucets and showers in the times required most to avoid wasting water in the drain while you are waiting for hot water to deliver at the source of your water heater. Suppose you own a bathroom with a shower away from the heater. In that case, you could discover that you must use the shower for at least 30 seconds or more before warm water that heat by the heater moves through the pipes before reaching the shower. When you install a hot water recirculator pump, it is possible to ensure that the water in the hotline constantly recirculates back towards the heater, meaning that it’s continuously warm and available to use.

There are many different designs of these systems. Still, the immediate hot water recirculating system that we’ll present to you to install in any existing plumbing system.

A quick brief on how to install a hot water recirculator

This post will provide an overview of how to install a hot water recirculator. The primary source in this manual is the manufacturer’s guidelines to install the Watts 500800 Hot Water Recirculating Pump. If you have questions about it is best to consult a licensed plumber. Certain cities and counties might require permits by an authorized plumber. Suppose the pipe over the tank isn’t removed flex pipe (such as the stainless steel braided) or copper or CPVC or CPVC. In that case, we suggest using a licensed plumber for the installation.

The most popular hot water circulation pump place over the heater. (There are some pumps specifically design to be put beneath sink fixtures that include a sensor valve as an integral component that is part of the pump.) Alongside the pump, the sensing valve must install in the farthest sink from the water heater. Many homes don’t have separate return lines specifically for the pump’s recirculation. I’ve observed that the water heater can send the lukewarm water in the water heater’s hotline into the tank via the supply lines for cold water. This is the point where sensors come to help. The sensor valve will open when the temperature of water of the hotlines decreases to about 95 degrees. The circulation system temporarily uses the cold water line to act as the return line.

How to install a hot water recirculator

Do you have an interest in knowing how to install a hot water recirculator pump? Hot water heaters that are instant could be an excellent option for anyone fed up with having to wait for hot water to be ready in the morning.


The first step is to install the hot water recirculation to switch off the power supply to the hot water heater. Locate the breaker in the electrical panel. It is usually a 30-amp breaker -turn the switch. Apart from shutting off the power supply to the heater for water, you’ll need to shut off the gas for the water heater for electric models. You may skip this step. There will be an orange or red gas valve next to the water heater. Just keep following the gas pipe from the tank. The gas valve should turn perpendicularly to shut off the gas. If you own an older water heater model and you have the pilot light, ensure that the pilot light has been removed.


You will now need to shut off the water. The most straightforward approach is to shut off the valve on the water supply located directly over the heater that must be in place or close by. The valve should turn in the perpendicular direction. Suppose you’re unable to locate the supply valve or have doubts. In that case, it is possible to shut off the water supply valve to the entire house.


After you have shut the water off, you’ll require to drain or flush the hot water out of all of the home’s plumbing. All you need to do is find the fixture with the lowest level in your home, then open the hot water tap. Allow all the home’s hot water to evaporate. If it cannot stop draining, then there’s still water flowing to the water heater.


After taking the hot water out of the piping, you’ll have to remove it from the heater. The drain valves for water heaters are (threaded hose the fixture) at the bottom of their tanks. Connect your water hose to the fixture and turn off the water valve using a flat head screwdriver. Transfer the water into an adjacent drain or sink. After draining, shut off the valve using a flat-headed screwdriver.


After removing the hot water from the house’s pipes and water heaters, It is now time to take your hot water pipe out of the heater. You likely have the flex pipe that has been braided that is easily removed. With this 3/4″ flexible pipe connection, all you need to do is use a hammer to loosen the nut and then remove the piping. If you’re using copper CPVC and PEX and soldering or cuts is necessary, you might need to employ a skilled plumber.


After eliminating the hot-water discharge piping, you can install the water pump on the threaded hot water outlet Nipple. Check your water pumps are set up correctly by putting the direction of the arrow on the housing toward the direction of the flow of water (away towards the hot water tank). Be aware that if you have a gasket made of rubber in a nipple with a female thread, then the use of Teflon plumbing tape isn’t necessary.


As you’ve just connected the recirculating pump on the heater for water, you must join the hotline of the water heater to the outlet of the water pump, Nipple. Just put pressure on the 3/4″ bolt using the help of a wrench. If the female flex piping end does not have a gasket made of rubber, put on Teflon tape to guarantee that the connection is leak-free.


It’s time to switch back the water on for the heater (or the whole home). Once the water heater fully fills up, use an appliance until the entire air removes from your home’s pipework.


After installing the recirculation pump, you should determine the closest sink to the water heater to put in the sensors valve. If you are having difficulty finding the most distant sink you can, you should find the most time-consuming one for hot water to reach.


It’s time to stop the faucet’s water supply. There is a shutoff valve that is for hot water and another for water that is cold. The stop valves turn in the sink perpendicularly or pull them out. The push-pull type, with the handle being circular.


Take the flex line directly to the stop valve on the walls (not the ends under the basin). The ends of the flex water lines are usually 1/8″ or 3/8″. If the lines that supply your sink are made of solid metal, such as steel or copper, You will need to replace them with elastic stainless steel braided. The sensor valve is likely to only contain half” connections. There are flex pipes available that have 1/2″ up to 3/8″ ends — 1/2″ up to 1/4″ ends — and 3/8″ to 3/8″. It is also possible to purchase 1/2″ up to 3/8″ adapter fittings rather than purchasing new hoses. The basic idea is to connect the supply lines with the cold and hot water outlets located on one side of the sensors valve. Then, you connect new flex lines coming from the stops to both sides of the valve.


Suppose you live in a large home and have branching piping, in which there are multiple hot water lines. In that case, you might prefer to install a different sensor valve in another location within the home. You can install sensor valves parallel beneath the same sink to boost water flow and reduce temperatures.

How to install hot water recirculation: Tips

It’s also a good idea to protect your hot water pipes, leading to the faucets and then returning towards the heater. This will allow you to keep the heat within and prevent it from escaping through the walls of pipes over time. When properly insulated, it will remain warmer for longer, which will reduce the number of times you need to run your pump all day to ensure warm water flows through pipes throughout the day. This could result in significant energy savings throughout.

California is a state that is famous for its hard water. Suppose you do not have a softener installed in your home. In that case, minerals in the water could ruin the hot water recirculating pumps. To ensure it will last as long as possible, you should look for pumps constructed of stainless steel, which will reduce the chance of corrosion and prevent calcium deposits from developing.

Also, be aware of the sizes of outlets and inlets. Calcium deposits accumulate within pipes, making these openings narrow as time passes. The bigger the opening, the easier it is for water to flow through. Even with some buildup, there’ll be plenty of water flowing through, increasing the amount you can get between your maintenance.


If you already have flex lines attached at the rear of your heater, setting up the recirculation pumps and sensor valve should not take too long. If you need to connect piping or join CPVC and CPVC, it could become challenging for the average homeowner. Now you learn how to install hot water recurculation. If you have any other ideas on this topic feel free to share them with us.

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