• The Dangers of Hot Water: Hot water can cause thermal shock, scalding, and promote Legionella bacteria growth. Watts thermostatic tempering valves help maintain safe water temperatures to prevent these issues.
• Limitations of Pressure Balanced Mixing Valves: These valves do not automatically control or limit outlet temperatures, posing potential safety risks. Watts thermostatic valves provide precise temperature control.
• Watts Safety Assurance: Watts has a history of providing safe valve technology, including thermostatic tempering valves for safe hot water distribution.
• ASSE Standards: Discusses ASSE standards 1016, 1017, 1069, and 1070 related to water temperature control and safety in plumbing systems.

Watts thermostatic tempering valves use a thermostat to adjust the flow of hot and cold water, maintaining a constant outlet temperature. In case of supply failure, the valve shuts off the affected inlet.

• Ensure consistent water temperature despite supply variations.
• Allow water heaters to operate at higher temperatures, reducing Legionella risk.
• Reduce the need for high-capacity water heaters by extending system flow rates.

Thermostatic valves are essential for maintaining safe water temperatures at fixtures, compensating for heat loss in piping systems.

Compares various ASSE standards, highlighting their applications, temperature ranges, and tolerances.

Outlines specifications for thermostatic mixing valves and faucets, ADA compliant and listed under ASSE 1070 and IAPMO cUPC. Maximum operating pressure is 125 psi, and maximum hot water temperature is 194°F (90°C). Temperature adjustment range is 60-120°F (15-49°C), with a minimum flow of 0.5 gpm (2.2 lpm). Cold water inlet temperature range is 39-80°F (4-27°C), and hot water inlet temperature range is 120-180°F (49-82°C).

Provides installation and adjustment procedures for the Under Sink Guardian® and other models, including steps for adjusting temperature, installing valves, and ensuring proper connections to prevent leaks.

Products are certified to NSF/ANSI 61 Section 9-G and are lead-free, containing less than 0.25% lead by weight. Listed under ASSE 1070, ASSE 1017, ASSE 1069, and IAPMO cUPC.

Recommends installing stop valves and check valves for periodic inspection and to prevent cross-flow in extreme pressure differential situations. Advises against using certain valves for recirculating water at elevated temperatures.

Describes various models including LFUSG-B-M2, LFMMV-M1, and LFL111, with features like lead-free brass construction, tamper-resistant locking nuts, and integral strainers. Details dimensions and weights of each model.

Tables provide dimensions, flow rates, and pressure drop information for different models. For example, the LFMMV series can handle flow rates from 0.5 gpm to 12 gpm, with a maximum pressure of 150 psi.

Provides detailed specifications and features of various valve series designed for hot water applications, focusing on lead-free construction and compliance with ASSE standards.

The LF1170 and LFL1170 series are designed for hot water source applications, constructed from lead-free cast copper silicon alloy. Comply with ASSE Standard 1017 and available in various connection types including union threaded, solder, PEX, CPVC, and Quick-Connect. Temperature range for LF1170 is 90°F – 160°F, while LFL1170 ranges from 60°F – 120°F.

Key features include a solid wax hydraulic principle thermostat for dependable mixing, integral filter washers, check valves, and an adjustment cap with a locking feature. Equipped with stainless steel springs and EPDM O-rings.

Valves operate with a minimum supply pressure of 30psi and can handle maximum temperatures of 200°F and pressures up to 150psi. Hot water inlet temperature ranges from 120°F to 200°F, and cold inlet from 40°F to 85°F.

Lists various models with specific dimensions and weights, suitable for different installation requirements. For example, the LF1170-UT-M2 model has dimensions of 4 7/8 inches in length and weighs 1.8 lbs.

Valves are intended for installation near boilers or water heaters and are not suitable for tempering water temperatures at fixtures where ASSE Standard 1016 or 1070 devices are required. Additional devices like Watts Series LFL111, LFUSG, or LFMMV should be used at fixtures to prevent injury.

Describes the LF70A and LFN170 series, designed for small domestic systems and larger hot water supply systems, respectively. Feature lead-free construction and are designed to mix hot and cold water efficiently.

The LFCS check stop valves are highlighted for their triple duty as isolation valves, check valves, and strainers, protecting against cross-flow and facilitating maintenance.

• Watts Series LF25AUB-Z3: Used for controlling water pressure in closed systems.
• Watts Series DET: Potable Water Thermal Expansion tanks control thermal expansion in an environmentally friendly way.
• Watts Series LF3005A: Dielectric Unions prevent electrolysis or galvanic action between dissimilar metals, avoiding corrosion.
• Watts Temperature and Pressure (T&P) Safety Relief Valves: Essential for preventing damage from excessive temperature or pressure in water heaters. The 100XL series is commonly used in residential heaters.
• Watts Series 100DT: Drain tubes direct hot water discharge safely from T&P valves.
• Watts Model LFN36: Vacuum relief valves prevent tank collapse and siphoning during drainage.
• Watts Series LF1170, LFL1170: Tempering valves are used to operate water heaters at higher temperatures and manage system flow rates.

• Typical Water Heater Installation: Utilizes various Watts components like shutoff valves, backflow preventers, vacuum relief valves, and tempering valves to ensure efficient and safe operation.
• Combination Systems: Use water heaters for both domestic hot water and space heating, often requiring elevated temperatures for sufficient BTU output.
• Recirculation Systems: Maintain minimum water temperature to prevent bacterial growth and ensure immediate availability of tempered water. Components include circulators, aquastats, and check valves to manage flow and prevent cross-connections.

• Radiant Heat Installation: Uses thermostatic tempering valves to control temperature in individual loops or zones, ensuring efficient heat distribution.
• Bypass Lines: Prevent condensation in high-efficiency boilers by recirculating boiler water to maintain optimal temperatures.

For technical assistance or to locate a Watts representative, contact details and resources are provided.