Series LF289
Spill Resistant
Atmospheric Vacuum Breakers
Sizes:
3
⁄8"–
3
⁄4"(10 – 20mm)**
Series LF289 is designed for indoor point of use applications
to prevent backsiphonage of contaminated water back into the
potable water supply. Separation of the water supply from the air
inlet is accomplished by means of a diaphragm seal. This fea-
ture protects against any spillage during start-up operation. The
LF289 features Lead Free* construction to comply with Lead
Free* installation requirements.
Features
•Springloadedvent
•Spill-resistantdiaphragmdesignforindooruse
•Affordabledesign
•Modularcartridgeforeaseofservice
•VentusesanO-ringforreliableoperation
•LeadFree*CopperSiliconAlloy
•Compactspacesavingdesign
•MeetsASSE1001(
3
⁄8" and
1
⁄2" only)
•Optionalsatinchromefinish
Installation
The LF289 is designed to be installed at the point of use. When
factory installed deck/machine mounted on machines or equip-
ment,thecriticalleveloftheLF289shallbe1"(25mm)abovethe
flood rim. If field applied for general plumbing applications, the
criticalleveloftheLF289shallbe6"(152mm)abovethefloodrim.
Specifications
Aspill-resistantatmosphericvacuumbreakershallbeinstalled,
in accordance with the manufacturer's instructions, as noted on
theplans.TheLeadFree*AtmosphericVacuumBreakershallbe
constructed using Lead Free* materials. Lead Free atmospheric
vacuum breaker shall comply with state codes and standards
where applicable, requiring reduced lead content. The valve shall
consist of a one piece modular check and float assembly made
of engineered thermoplastic and housed in a Lead Free cast
copper silicon alloy body. Springs shall be stainless steel. The
valve shall be constructed with a molded diaphragm separating
the air inlet from the potable water supply to prevent spillage.
The valve shall be a Watts Series LF289.
Series LF289
Hood
Bonnet
Vent Spring
O-ring
Vent O-ring
Retainer
Body
Hood Screws
(2 Req'd)
Check
Assembly
3
⁄8" and
1
⁄2"
sizes only
1001
Typical Installation
Watts LF289
Flood Rim Level
Supply Line
LF289 to be installed
6"above the flood
rim if field applied
for general plumbing
applications.
For Health Hazard Applications
ES-LF289
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’sP.O.No.
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Approval
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Representative
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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.
LEAD FREE
*
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
**Metric Dimensions are nominal pipe diameter. This product is
produced with NPT threaded end connections.
(1 pages)
(4 pages)
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