Watts LFMMV-HTK Hot Water Tank Capacity Extender

Brochure
Installation Manual
Spec. Sheet

Description:

LFMMV-HTK hot water tank capacity extender increases hot water capacity by as much as 133%, depending on storage and hot water flow. It maintains and limits mixed hot water to a desired, selectable temperature and allows the hot water tank to be set at a higher temperature to minimize the occurrence of Legionella and other water-borne bacteria. The LFMMV-HTK can be set to any temperature between 80° and 120° with the flow rate as low as 0.5 gpm and as high as 13 gpm. The thermostatic valve is listed to ASSE 1070, ASSE 1017 and IAPMO cUPC.

Specification: 

• Temperature Adjustment 80 - 120°F (27 - 49°C) 
• Approach Temperature 5°F (3°C) above set point 
• Maximum Operating Pressure 125psi (861 kPa) 
• Maximum Hot Water Temperature 200°F (93°C) 
• Cold Water Temperature Range 39 - 80°F (5 - 27°C) 
• Maximum Pressure Differential Between Hot and Cold Supplies 25% 
• Minimum Flow 0.5 gpm (1.90 lpm) when tested in accordance with ASSE 1017 & ASSE 1070 
• Flow at 45psi pressure drop 13 gpm (49 lpm) 
• Listing (valve only) ASSE 1017, ASSE 1070, IAPMO cUPC and NSF372

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.
+Thermostatic valve only

Features:

• Increases hot water capacity from the hot water tank by as much as 133% depending on storage and incoming cold water temperature 
• Allows hot water tank to be set at higher temperature to minimize the occurrence of Legionella and other water-borne bacteria 
• Valve and key components conveniently packaged in one box 
• Temperature control to ASSE 1017 and ASSE 1070 down to 0.5gpm 
• Adjustable temperature selection with lock down 
• Advance thermal actuator for precise control 
• Integral checks and screens prevent cross-flow and contamination 
• Includes thermostatic valve, corrugated stainless steel connector, tee and elbow

The Series LFMMV-HTK mixing valve kit installs on a hot water tank to increase hot water capacity by providing greater control over water temperature and flow.

The valve: 

• Allows water to be stored at higher temperatures 
• Regulates the amount of hot water supplied to the valve to precisely maintain outlet set-point temperature 
• Avoids the need to replace a hot water tank with a larger-capacity unit 
• Extends water heater capacity by as much as 133% depending on storage and incoming cold water temperature 
• Limits and maintains mixed outlet temperature via lockable function 
• Helps reduce water-temperaturerelated risks, such as Legionella and scalding Valve listed to ASSE 1017, ASSE 1070, & IAPMO cUPC Lead Free* valve construction