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Faster Hot Water

DRS-S Installation Instructions

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Choose your method of installation from the options below. 

Option A:  Click on the diagram below showing the hot water return line teeing into the cold water line at the top of the water heater.

After Step 5 below follow the instructions followed by the letter A.

Option B:  Click on the diagram below showing the hot water return line connecting to the drain valve at the bottom of the water heater.

After Step 5 below follow the instructions followed by the letter B.

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Click on figure to enlarge

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Click on figure to enlarge

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Return Into Cold Water Line Diagram Return Into Drain Valve Diagram


Step 1:  Inspect your water heater supply lines

If the supply lines are old and inflexible they will need to be replaced.

New 3/4" SharkBite water heater supply lines from your local home improvement store make replacement of old supply lines fast and easy. Sharkbite water heater supply line.png
Step 2:  Turn off water heater

Electric - turn off power by either unplugging the water heater or shutting off the appropriate breaker.

Gas, propane or heating oil - turn off water heater and make sure the pilot light is turned off.


Failure to follow procedures described in this document could have impact upon warranty and may cause inadvertent property damage.

Step 3:  Turn off water

Turn off the water to the water heater.

In most cases there is a valve located above the water heater in the cold water supply line. 
Step 4:  Drain the hot water lines

Turn on any hot water faucet in the house and let it run until the water stops flowing. Leave the faucet on for the duration of the installation. Drain remaining hot water using the hot water spigot on the water heater.

Note: If water continues to flow, check to make sure that the water has been completely turned off. If the valve does not shut off the water flow completely, turn off the valve supplying water to the house or at the water meter. 
Step 5:  Install pump in return line
Use 2 - 3/4" female adapters or 2 - 3/4" SharkBite female adapters to return water line.   Note:  Pump can be installed in 1/2" return line but will need appropriate 3/4" to  1/2" reducers.

Note: The large yellow arrow on the Flow Monitor must be pointing in the direction of flow. The direction of water flow through the Flow Monitor can be changed by removing the 4 screws and turning the black cap and internal parts of Flow Monitor 180°. Reinsert screws and tighten.

The Flow Monitor must be installed outside the hot water return loop.  See figures above for the appropriate location for your application.

Step 6a:  Install Flow Monitor (return into drain valve)

Make sure arrow on Flow Monitor is pointing toward the female end.  If not, refer to directions above.

Screw the female end of the Flow Monitor on to the nipple on the cold water discharge pipe (see picture).

Thread cold water supply line onto the male end of the Flow Monitor.

Warning: do not over tighten.

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Step 6b:  Install Flow Monitor (return into cold water line)

Make sure arrow on Flow Monitor is pointing in the direction of water flow.  If not, refer to directions above.

Install Flow Monitor in the cold water that feeds the water heater.  The Flow Monitor must be installed outside the dedicated return loop.  

Warning: do not over tighten.

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Step 7:  Remove existing pump
If this is a retrofit installation, unplug and remove the existing circulation pump and dispose of it in accordance with your local codes.   
Step 8:  Install new pump and Pump Manager

Install new pump in return line using 3/4" female fittings. We recommend using Shark Bite style fittings because they require no soldering and are very easy to use.

Optional ball valves can be installed on either side of the pump for ease of maintenance, if required.

Plug new pump into the Pump Manager and plug the Pump Manager into a properly grounded 110 vAC outlet.

Note: Route the cord away from any vents on gas, propane or oil fired water heaters.

Step 9:  Set pump speed
Set pump speed to 3 for the fastest operation. Pump speed switch trans MT.png
Step 10:  Set pump mode
Set the rocker switch in the pump's electrical cord to the "Move" position (the continuous position in the picture to the right). Rocker switch DRS MT.png
Step 11:  Turn water back on

Make sure that a hot water faucet is turned on in the house and then slowly turn the water back on to the water heater. Check for leaks and repair as necessary.

Leave the water running until all of the air has been purged from the water pipes including all hose bibs. Turn off the faucet.

Note:  Both the hot and cold water lines need to be purged.

Step 12:  Connect the Flow Monitor to the Pump Manager

Connect the low voltage wires from the Flow Monitor to the Pump Manager using the proper wire connectors.

If extra length is required standard thermostat wire can be used.

The color of the wires are as follows:

Flow Monitor - Blue and Brown

Pump Manager - Red and black or red and white

The blue wire connects to the red wire and the brown wire connects to either the black or the white wire.


Step 13:  Test Dedicated Recirc System

Turn on any hot water faucet in the house for 1 second and turn it off.

Pump should continue to operate for approximately 3 minutes after the faucet has been turned off.

Note:  The 3 minute timer will not start until all demand for hot water has ended.  The timer can be adjusted as needed but will require contacting customer support at (619) 786-2830 for assistance.  

Note:  Opening the Pump Manager may void your warranty.

Electrical Information

Safety Warning - Risk of Electrical Shock

This pump is supplied with a grounding conductor. To reduce the risk of electrical shock, be certain that it is connected only to a properly grounded grounding type receptacle.

The safe operation of this pump requires that it be grounded in accordance with the national Electrical Code and local government regulations.

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