Taco D’MAND System - On Demand Hot Water Delivery

The Taco D’MAND System is the only recirculating system that operates 24 hours to provide hot water “on demand”.

Taco D'MAND saves you water, energy, time and money.

The D’MAND System is a small, silent pump that you attach to the hot and cold water lines in the cabinet under the most remote kitchen or bath fixture in the home. When the D’MAND System is activated, the cool water you normally let run down the drain is recirculated back to the water heater through the cold water line.

On demand, the pump circulates hot water from the water heater and returns the cooled water back through the cold water line. When the hot water arrives at the faucet, the D’MAND System’s patented heat sensor and control board shut off the pump to prevent pumping excess hot water into the cold water line.

Features and Benefits of the Taco D’MAND® System:

• Instant Hot Water Comfort
• Maximum Water & Energy Savings - Saves Water, Energy, Money and Your Time.
• 24 Hour "On-Demand" operation
• Maintenance free circulator - unmatched reliability
• Removable stainless steel cartridge - contains all moving parts
• UL, IAPMO listed
• Patented D’MAND® electronics control board
• Integral Flow-Check (IFC) to prevent thermo-siphoning or gravity flow
• Pre-wired power cord and integral temperature sensor
• Adapter tees & stainless steel flex lines included
• RF wireless remote or motion sensor starter-optional
• Runs Only When Activated by the User
• Automatically Senses When Water is Hot Enough.
• Saves Construction Costs—No new return line needed and no need to drain the system.
• Simple Installation

With the Taco D’MAND ® System, there are no standby losses, no stack losses, no need for extra® delivers instant hot water by push button or motion sensing – not by temperature sensor or a timer. 

 D’MAND®  With the Energy Star approved D’MAND storage tanks.

D’MAND eliminates the need for a conventional recirculation system, and has been engineered to provide the head pressure needed to overcome the high pressure drops experienced with tankless water heaters.

If you’re going tankless... Go D’MAND - Leading tankless water heater manufacturers now recommend use of their products with a quality on-demand water recirculation system like Taco’s D’MAND.

In fact, some of those manufacturers may reduce the warranty coverage period if their product is used with a conventional timer-controlled recirculation system.

Conventional water recirculation systems fitted with temperature sensors and timers are not considered “on demand”...that’s why choosing the Taco D’MAND is always the right choice.

Yes The Taco D’MAND®  hot water recirculation system is GREEN it carries Energy Star Partner approval.

How D'MAND Hot Water Systems Work.

How Does the D’Mand Hot Water System work?

At the push of a button, theTaco® Hot Water D'MAND® System circulates the ambient temperature water in the hot water pipes (water that would  normally be lost down the drain) back to the water heater.

This recirrculation occurs up to 80% faster than just letting the water run down the drain—which is the usual scenario. Depending on the plumbing
layout, the route and time can vary. The Taco D'MAND System moves the water so rapidly, that hot water arrives at the fixtures before the heat is lost through the pipe. While on this area of discussion, it is reccomended that all hot water distribution piping be insulated always whether using a hot water delivery system or not insulation is always a basic foundation of saving energy related to any heating or cooling project.

Here is how the Taco D'EMAND Hot Water System works, as the ambient temperature water in the cold water line travels towards the hot water heater, the D'MAND System fills the hot water line with hot water. When the hot water reaches the D'MAND System, a thermal sensor (also known as a thermistor) senses a temperature rise and quickly closes the zone valve while at the same time it shuts the pump off. The sophisticated electronic circuitry that does this is attached to the high-performance pump housing.

This technology results in getting hot water to the fixtures four to five times quicker (on average), this give you greater convenience in not having to wait saving you presious time, of course you can also enjoy a savings in water and energy, and a reduction in sewage waste water costs. As a by-product of these savings, a cumulative result is the improvement of air quality and quality of life.

Taco's D'MAND System can utilize the cold water line as a return line or use a dedicated return line. By using the existing cold water line, it is easy to retrofit existing plumbing systems. No special plumbing is needed, and since the Taco D'emand System will not allow hot water to cross over to the cold water line, all the cold water fixtures still have cold water.

Activating the D'MAND® System

Every model of the D'MAND® System can be activated by one or more methods. Regardless of which of the methods below is used, all D'MAND®   Systems include D'MAND® Activation, a uniquemethod of controlling the pump.

D'MAND Button
A small doorbell-type button connects to the electronic controller by a 12-volt, 18-gauge standard
bell wire. These buttons may be placed at one or all locations where there is a demand for hot
water. This type of activation is commonly used on new home construction or remodeling of
existing homes.

Wireless Remote Control
A small receiver is connected to the master controller. Small remote control buttons can be
placed at any location in the home. Working on radio frequencies, a signal can be transmitted up
to 100' through walls. This method of activation is most common on existing homes where the
wiring for the D'MAND button (mentioned above) is difficult to install.
Automatic Activation
Low voltage breakers can be placed on doors to allow for automatic activation when a door opens
or closes. This is most commonly used for public restrooms in restaurants, factories, hospitals,
etc.

Motion Sensor
Motion Sensors are adaptable to both new homes and existing homes. On new homes, they are
hard-wired by low voltage wires to specific locations that require hot water use. For existing
homes, wireless motion sensors are available that will send signals up to 100 feet to activate the
D'MAND System. Motion Sensors are designed not to allow activation of a subject under 4 feet
high or 40 pounds of weight.

Sizing Your D'MAND® System

Standard Piping:

Tank Type Water Heater: 

Tankless Water Heater: 

Recirculation Piping:

Tank Type Water Heater: 

Tankless Water Heater: 

Demand Hot Water - It' easy for you to be Green & Comfortable!

Taco D'MAND is easily installed in new or existing homes Taco's D'mand Hot Water Delivery System Will work with any water heating system and it may be installed within two hours or less on any existing or new home. Installation of the Taco D'mand Hot Water Delivery System does not require major plumbing.

D’MAND® SYSTEMS Links to Related Documents

Color Literature / Inofrmation Sheet
Operating Instructions For Models: 006-DM-PK, 008-DM-PK.
D'MAND Tankless Water Heater Data Sheet

Taco D'MAND Hot Water Recirculating Systems are available in the following models: 006-DM, 008-DM-PK, 008-DM, 008-DM-PK, 0011-DM and 0011-DM-PK.