Watts LFNLF-9 User Manual
For Health Hazard Applications
ES-LFNLF9
Job Name
Job Location
Engineer
Approval
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LEAD FREE
*
Contractor
Approval
Contractor’s P.O. No.
Representative
Series LFNLF9
Dual Check Vacuum Breakers
for Laboratory Faucets
Sizes: 3⁄8" (10mm)
Series LFNLF9 Dual Check Vacuum Breakers for Laboratory
Faucets are used for noncontinuous pressure, health hazard, applications and are backsiphonage backflow preventers. This series is
specially made for laboratory faucets where portable hoses can be
attached and prevent the flow of contaminated water back into the
potable water supply. These vacuum breakers can be installed on
new or existing faucets without plumbing changes. The LFNLF9 features Lead Free* construction to comply with Lead Free* installation
requirements.
Pressure-Temperature
Temperature Range: 33°F – 180°F (0.5°C —82°C)
Maximum Working Pressure: 150psi (10.3 bar)
Applications
LFNLF9 should be installed on every laboratory outlet where a hose
can be attached. Its unique design provides full protection against all
backsiphonage conditions.
To prevent tampering, it is recommended that the LFNLF9 be
secured to the laboratory faucet with Loctite.
Use LFNLF9 for non-continuous pressure applications.
Laboratory Faucet
LFNLF9
Hose
Connection
Recommended Watts
Strainer
Dimensions — Weights
SIZE (DN) DIMENSIONS WEIGHT
in. mm in. mm in. mm in. mm lbs. kgs.
3
⁄8 10 23⁄8 60 11⁄4 32 1 25 .38 .17
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
A B B1
Combination
Fixture
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LFNLF9
Capacity
kPa psi
207 30
172 25
138 20
103 15
69 10
35 5
0 1 2 3 4 5 6 gpm
0 3.8 7.6 11 15 19 23 lpm
Construction
LFNLF9 is suitable for either hot or cold water service. It features
brass construction and a primary check valve utilizing a soft disc
which seats against a soft rubber mating part to ensure tight closing. A secondary check valve utilizes a soft disc-to-metal seating.
LFNLF9 provides better-than-average flow rate and consequently
lower pressure loss. Construction is brass body with polished
chrome plating, stainless steel working parts and durable rubber
diaphragm and disc.
B
A
B1
Standards
CSA B64.7
ASSE 1035 – “Laboratory
Faucet Vacuum Breakers”
Approvals
ASSE CSA
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts
reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications
on Watts products previously or subsequently sold.
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
ES-LFNLF9 1322 © 2013 Watts
A Watts Water Technologies Company
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