Integrated Pressure Sensors: Test cocks 2, 3, and 4
Modular Design: Easy maintenance and in-line repairs
Description
This 10 inch Lead Free Double Check Valve Backflow Preventer Assembly, Watts Series LF709, is designed to prevent polluted water from flowing back into the potable water supply. Ideal for non-health hazard cross-connections, it features a modular design for simplified maintenance and in-line repairs. The assembly includes ArmorTek® coating technology to protect against microbial-induced and general corrosion, alongside domestic NRS resilient seated gate valves. Integrated pressure-sensing test cocks allow for performance monitoring when used with an optional connection kit. This robust unit ensures compliance with lead-free installation requirements and operates up to 175 psi. Item number 88003436.
Help Me Connect
Monitoring Connection
This Watts LF709 assembly features integrated pressure sensors at test cocks No. 2, No. 3, and No. 4.
To activate these sensors and collect data, an add-on monitoring connection kit (sold separately) is required.
The connection kit communicates via a wired serial (RS-485) interface.
It is compatible with most Building Management Systems (BMS) and Building Automation Systems (BAS) for remote monitoring of assembly performance.
The 10 inch Watts Series LF709 Double Check Valve Assembly is a lead free backflow preventer designed to prevent the reverse flow of polluted water into the potable water supply due to backsiphonage or backpressure. This assembly is ideal for continuous pressure piping applications and cross-connections identified as non-health hazards, where approved by the local authority having jurisdiction.
Key Features
Modular design concept with a single access cover facilitates complete maintenance and in-line repairs.
Constructed with a fused epoxy coated cast iron body and domestic NRS resilient seated gate valves.
Includes two in-line independent positive seating check modules with captured springs and replaceable check discs and seats.
Features ArmorTek® coating technology, a patented three-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
Lead Free* construction ensures compliance with relevant installation requirements.
Allows for maximum flow at low pressure drop.
Integrated pressure-sensing test cocks (No. 2, No. 3, and No. 4) measure pressure fluctuations. These sensors activate with an add-on monitoring connection kit (sold separately) to transmit data to a Building Management System (BMS) or Building Automation System (BAS).
No special tools are required for servicing.
Approved for vertical flow up installation.
The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight. Always read all installation instructions and product safety information before beginning installation.
Specifications
Product Type: Double Check Valve Assembly
Model: LF709
Size: 10 inch
Body Material: Fused Epoxy Coated Cast Iron
Seat Material: Stainless Steel
Coating: ArmorTek® Powder Coating (Internal and External)
Check Modules: Two In-Line Independent Positive Seating
Springs: Captured
Test Cocks: Top Mounted, Integrated Pressure-Sensing (No. 2, No. 3, No. 4)
Continuous Temperature Range: 33°F - 110°F (0.5°C - 43°C)
Intermittent Temperature Range: 140°F (60°C)
Maximum Working Pressure: 175 psi (12.1 bar)
Lead Content: Less than 0.25% by weight (wetted surface)
Certificates & Approvals
ASSE No. 1015
AWWA C510-92
CSA B64.5
UL Classified File No. EX3185
Foundation for Cross-Connection Control and Hydraulic Research (University of Southern California)
IAPMO PA 31
USC Manual for Cross-Connection Control, 8th Edition
NSF Certified to NSF/ANSI 61-G
FM Approved
FAQs
What is the primary purpose of the Watts LF709 Double Check Valve Assembly?
Its primary purpose is to prevent the backflow of polluted water into the potable water supply, protecting against both backsiphonage and backpressure in non-health hazard installations.
Is this backflow preventer suitable for all types of cross-connections?
No, this assembly is specifically designed for non-health hazard installations. The suitability for specific cross-connections must be determined by the local authority having jurisdiction.
What type of corrosion protection does this assembly feature?
The assembly features ArmorTek® coating technology, a patented three-part advanced epoxy system. This coating is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.
How does the integrated pressure-sensing capability work?
The LF709 includes integrated pressure sensors at test cocks No. 2, No. 3, and No. 4. An add-on monitoring connection kit (sold separately) is required to activate these sensors and transmit data to a Building Management System.
What is the maximum operating pressure and temperature for this unit?
This 10-inch LF709 backflow preventer has a maximum working pressure of 175 psi (12.1 bar). Its continuous operating temperature range is 33°F - 110°F (0.5°C - 43°C), with an intermittent range of 140°F (60°C).
