Series LFN388
Hot or Cold Water Anti-Siphon
Vacuum Breaker
Sizes:
1
⁄4" and
3
⁄8" (8 and10mm)
Bottom Inlet and Outlet Connections
Series LFN388 represents a line of vacuum breakers de-
signed to prevent backsiphonage of contaminated water into
the potable water supply. The LFN388 features Lead Free*
construction to comply with Lead Free* installation require-
ments.
They feature a lightweight, durable “disc float" suitable for
temperatures up to 180°F (82°C) which closes the atmo-
spheric vent to prevent spilling under all rates of flow. They
are ideally recommended for low flow installations such as
laboratory equipment which use small amounts of water.
They also contain a durable silicone disc which has high heat
and water hammer shock resistance and assures tight seat-
ing with the lightest of seating contact.
Full Size Orifice - All Series LFN388 valves have a full-size ori-
fice to assure pipe size capacity. Water passages are stream-
line to provide high water flow with minimal pressure loss.
Features
•LeadFree*castcoppersiliconalloybody
•Fullsizeorificeformaximumflow
•Lightweightdiscassemblypreventsspillingunderallrates
of flow
Models
N388 Lead Free* cast copper silicon alloy body
N388-SC Satin Chrome
N388-C Polished Chrome
Applications
•BottleWashers
•ChemicalDispenser
•Dishwasher
•PhotographicTanks
•ShampooSinks
•SoapDispensers
For Health Hazard Applications
ES-LFN388
Job Name
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Contractor
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Job Location
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Approval
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Engineer
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Contractor’s P.O. No.
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Approval
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Representative
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LFN388
Specifications
For Anti-Siphon Vacuum Breakers
An atmospheric type anti-siphon vacuum breaker shall be
installed where indicated on the plans to prevent the back-
siphonage of contaminated water. The device shall include
lightweight disc float with silicone disc for tight seating. This
device is not to be used under continuous pressure or where
there is a possibility that a backpressure condition may de-
velop. The vacuum breaker shall be constructed using Lead
Free* cast copper silicon alloy materials. Lead Free* vacuum
breakers shall comply with state codes and standards, where
applicable, requiring reduced lead content. The device shall
meettherequirementofASSEStandard1001:CSAB64.1.1.
Watts Series LFN388.
Vacuum Breakers are not designed, tested or approved to protect
against backpressure backflow. For protection against backpressure
backflow, install Watts No. 909/009 Series Reduced Pressure Principle
BackflowPreventers.
LEAD FREE
*
* The wetted surface of this product contacted by consumable water
contains less than 0.25% of lead by weight.
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 with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
NOTICE
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