Watts LF800M4FR User Manual download pdf

Series LF800M4FR

Freeze-Resistant Pressure Vacuum

Breakers

Sizes:

⁄2" – 2" (15 – 50mm)

Series LF800M4FR is designed to prevent backsiphonage of

contaminated water under continuous pressure into the potable

water supply. Its superior design protects the valve body and

internal components during sudden freeze conditions. Water

inside the PVB freezes from the outside-inward.

As the ice forms and expands, causing a buildup of pressure,

the LF800M4FR relieves the pressure through a unique relief

valve built into the plastic float.

Test cocks are positioned at the lowest point of the valve for

winterization draining. The LF800M4FR is reusable with the

relief valve designed to automatically re-seat. It will not dis-

charge through the relief valve during normal operation. (The

built-in relief valve is not designed to provide freeze protec-

tion for the entire irrigation system.) The LF800M4FR features

Lead Free* construction to comply with Lead Free* installation

requirements.

Features

•Uniquebuilt-inreliefvalverelievespressurecaused

by ice formation

•Replaceableplasticseat

•Easymaintenanceofinternalparts

•O-ringbonnetsealforlesspossibilityoffouling

•Siliconeseatdiscfordurability

•Testcockspositionedforeasytestingandwinterization

•Compactspacesavingdesign

•Standardlyequippedwithteehandlequarterturnballvalve

shutoffs

⁄2" – 1" (15 – 25mm). The 1

/4" - 2" (32-50 mm) fea-

tures lever handles

•Nospecialtoolsrequiredforservicing

•LeadFree*CastCopperSiliconAlloybodyfordurability

For Health Hazard Applications

LF800M4FR

Specifications

Pressure Vacuum Breakers

A pressure anti-siphon vacuum breaker shall be installed where

indicated on the plans to prevent the backsiphonage of con-

taminated water. This assembly is not to be used where there

is a possibility that a back pressure condition may develop. The

assembly will incorporate an acetal bonnet with silicone rubber

O-ringsealandsiliconerubberseatdisc.Thevalveshallhave

replaceableseats.Checkassemblyshallbeguidedoveritsfull

stroke by ‘V’ notch guides.

The assembly shall include an internal, built-in relief valve

designed to protect the internal components and the backflow

body from freezing. The relief valve shall be repeatable, auto-

matically re-seating when the pressure within the valve is below

the set point of the freeze relief valve. The Lead Free* Freeze-

Resistant Pressure Vacuum Breakers shall comply with state

codes and standards, where applicable, requiring reduced lead

content.

TheassemblyshallmeettherequirementsofANSI/ASSE

Standard 1020.

The valve shall be a Watts Series LF800M4FR.

Now Available

WattsBox Insulated Enclosures.

For more information, refer to literature ES-WB.

* 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.

ES-LF800M4FR

LEAD FREE

JobName

–––––––––––––––––––––––––––––––––––––––––––

 Contractor

––––––––––––––––––––––––––––––––––––––––––––

Job Location

–––––––––––––––––––––––––––––––––––––––––

Approval

–––––––––––––––––––––––––––––––––––––––––––––

Engineer

–––––––––––––––––––––––––––––––––––––––––––––

 Contractor’sP.O.No.

––––––––––––––––––––––––––––––––––

Approval

–––––––––––––––––––––––––––––––––––––––––––––

Representative

––––––––––––––––––––––––––––––––––––––––

1 2 3 4

Summary of Contents

Page 1 - LEAD FREE

Series LF800M4FRFreeze-Resistant Pressure Vacuum BreakersSizes: 1⁄2" – 2" (15 – 50mm)Series LF800M4FR is designed to prevent backsiphonage o

Page 2 - A B C D E G

MaterialsSprings Stainless SteelBonnet CelconVent Disc Silicone RubberDisc Holder Float PolypropyleneCheckValveDisc SiliconeRubberCheckValve

Page 3 - Capacity

1" (25mm) kPa psi 96 14 83 12 69 10 55 8 41 6 28 4 14 2 0 00 10 20 30 40 50 60 gpm0 38 76 114 152 190 228 lpm 5 7.5 10 15 2

Page 4

For additional information, visit our web site at: www.watts.comES-LF800M4FR1318  ©2013WattsUSA:Tel:(978)688-1811•Fax:(978)794-1848•ww

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Watts LF800M4FR User Manual

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