This Watts 8 inch Lead Free Double Check Detector Backflow Preventer Assembly, Series LF757DCDA, prevents the backflow of non-health hazard pollutants from entering the potable water supply system.

It is designed for non-health hazard applications and can be installed under continuous pressure service to protect against both backpressure and backsiphonage. This assembly is primarily used on fire line sprinkler systems when monitoring unauthorized water use is necessary, and it includes a gallons per minute meter that measures water flow.

Construction & Design

• Features Lead Free* construction.
• Extremely compact design, 70% lighter than traditional designs.
• Housing and sleeve constructed from 304 Schedule 40 stainless steel.
• Groove fittings allow integral pipeline adjustment for easy installation.
• Unique tri-link spring checks provide the lowest pressure loss.
• Unmatched ease of serviceability with removable, serviceable tri-link checks without special tools.
• Tri-link checks have reversible elastomer discs that provide drip tight closure against reverse flow.
• Can be used for horizontal, vertical, or N pattern installations.
• Equipped with UL/FM grooved gear operated butterfly valve shutoffs with tamper switch.
• Includes a bypass assembly with a meter that registers in gallon or cubic measurement.
• Replaceable check disc rubber.

NOTICE: The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.