Series LF3L and LF53L are used for protection against excessive pressure on domestic storage tanks or tankless water heaters. Similar in construction to WATTS® Model LF10L, the Model LF3L has no temperature relieving element. Model LF53L has the same basic design as Model LF3L except it is furnished in 1/2 in. (15mm) size and does not comply with ASME requirements. Pressure range is 75-150psi (5.2-10.3 bar). Series LF3L and LF53L come in standard settings of 75, 100, 125 and 150psi (5.2, 6.9, 8.6 and 10.3 bar). These Pressure Relief Valves are popularly used in conjunction with the Model LF210 gas shutoff valve on gas water heaters to shut off gas to heater if water heater temperature exceeds 210 deg F (99 deg C). The LF3L and LF53L features Lead Free construction to comply with Lead Free installation requirements.

WATTS® Pressure Relief Valve, Poppet, Series: LF3L, 3/4 in Nominal, 150 psi, 210 deg F, Copper Alloy Body, 1-5/32 in W x 3-11/64 in H, Domestic

• Lead free copper alloy body
• Furnished with test levers
• Relieves excessive pressure on storage tanks
• Relieves excessive pressure on tankless water heaters
• Model LF3L is ASME approved
• Compatible with model LF210 gas shutoff valves
• For residential, commercial and industrial applications
• Stainless steel spring
• Silicone disc
• Maximum system operating pressure must not exceed 75% of valve set pressure
• For protection against excessive pressure
• The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight

• Specification Sheet https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/https://assets.unilogcorp.com/2/ITEM/DOC/Watts_Water_0121439_Specification_Sheet.pdf