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LF4000B_0425984
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LF4000B

Lead Free* Cast Silicon Copper Alloy Reduced Pressure Zone Assembly Backflow Preventers

Features

  • Lead Free* cast silicon copper alloy construction for durability
  • Single, top-access cover and modular check construction for ease of maintenance
  • Large body passages provide low pressure drop
  • Internal relief valve reduces installation clearances
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Series LF4000B Reduced Pressure Zone Assemblies are designed to protect potable water supplies in accordance with national plumbing codes and water authority requirements. This series can be used in a variety of installa­tions, including the prevention of health hazard cross connections in piping systems or for containment at the service line entrance. The LF4000B features Lead Free* construction to comply with Lead Free* installation requirements. Maximum Working Pressure: 175psi (12.1 bar).

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF4000B

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Model Product Used On - Series or Model Kit Contents
Product Image - ARK 4000B CK1 1-2
ARK 4000B-CK1 1/2

First Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000B-CK2 1-2
ARK 4000B-CK2 1/2

Second Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
7016647 Product Image
ARK 4000B-RC3 1/2

Check Rubber Parts Kit

</br>4000B, LF4000B</br>

Disc, Cover O-ring, Seat O-ring</br>
Product Image - ARK 4000B-RETAINER 1-2
ARK 4000B-RETAINER 1/2

Retainer Kit

</br>4000B</br>

</br>
Product Image - ARK 4000B-RT 1-2
ARK 4000B-RT 1/2

Complete Rubber Parts Kit

</br>4000B</br>

Diaphragm, 2 Disc, 2 Disc Assemblies, Stem O-rings, Cover O-rings, 2 Seat O-rings, RV Seat O-ring</br>
Product Image - ARK 4000B-RV 1/2
ARK 4000B-RV 1/2

Relief Valve Rubber Parts Kit

</br>4000B</br>

Diaphragm, Disc Assembly, Stem O-rings , Seat O-ring, Cover O-ring</br>
ARK 4000B-VT 1/2

Total Relief Valve Kit

</br>4000B</br>

Seat, Seat O-ring, Stem and Diaphragm Assembly, Stem O-ring, Cover O-ring, RV Spring</br>
Product Image - LFARK 4000B-C 1/4-1/2
LFARK 4000B-C 1/2

Cover Kit

</br>4000B, LF4000B</br>

Cover, Cover O-ring</br>
Product Image - ARK 4000B-C 1
ARK 4000B-C 1

Cover Kit

</br>4000B</br>

Cover, Cover O-ring</br>
Product Image - ARK 4000BM2-CK1 1
ARK 4000BM2-CK1

First Check Kit

</br>4000B, LF4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000BM2-CK2 1
ARK 4000BM2-CK2

Second Check Kit

</br>4000B, LF4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000BM2-RC1 1
ARK 4000BM2-RC1

First Check Rubber Parts Kit

</br>4000B</br>

Disc, Cover O-ring, Seat O-ring</br>
Product Image - ARK 4000BM2-RC2 1
ARK 4000BM2-RC2

Second Check Rubber Parts Kit

</br>4000B, LF4000B</br>

Second Check Assembly O-ring, Disc Holder Assembly, Cover O-ring, Sensing Passage O-ring</br>
Product Image - ARK 4000BM2-RT 1
ARK 4000BM2-RT

Complete Rubber Parts Kit

</br>4000B</br>

Diaphragm, Disc, Disc Assembly, Stem O-ring, Cover O-ring, Seat O-ring, RV Seat O-ring</br>
Product Image - ARK 4000bm2-RV 1
ARK 4000BM2-RV

Relief Valve Rubber Parts Kit

</br>4000B, LF4000B</br>

Diaphragm, Disc Assembly, Stem O-rings , Seat O-ring, Cover O-ring</br>
Product Image - ARK 4000BM2-VT 1
ARK 4000BM2-VT

Total Relief Valve Kit

</br>4000B, LF4000B</br>

Seat, Seat O-ring, Stem and Diaphragm Assembly, Stem O-ring, Cover O-ring, RV Spring</br>
Product Image - ARK 4000B-Retainer 1
ARK 4000B-RETAINER 1

Retainer Kit

</br>4000B</br>

</br>
Product Image - ARK 4000B-CK1 11-4-11-2
ARK 4000B-CK1 1 1/4-1 1/2

First Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000B-CK2 11-4-11-2
ARK 4000B-CK2 1 1/4-1 1/2

Second Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000BM2RCI 11-4-11-2
ARK 4000BM2-RC1 1 1/4-1 1/2

First Check Rubber Parts Kit

</br>4000B</br>

Disc, Cover O-ring, Seat O-ring</br>
Product Image - ARK 4000B RC 11-4-11-2
ARK 4000B-RC 1 1/4-1 1/2

Second Check Rubber Parts Kit

</br>4000B</br>

Second Check Assembly O-ring, Disc Holder Assembly, Cover O-ring, Sensing Passage O-ring</br>
Product Image - ARK 4000B RET 11-4-11-2
ARK 4000B-RETAINER 1 1/4-1 1/2

Retainer Kit

</br>4000B</br>

</br>
Product Image - ARK 4000B-RT 11-4-11-2
ARK 4000B-RT 1 1/4-1 1/2

Complete Rubber Parts Kit

</br>4000B</br>

Diaphragm, 2 Disc, 2 Disc Assemblies, Stem O-rings, Cover O-rings, 2 Seat O-rings, RV Seat O-ring</br>
Product Image - ARK 4000B-RV 11-4-1-1-2
ARK 4000B-RV 1 1/4-1 1/2

Relief Valve Rubber Parts Kit

</br>4000B</br>

Diaphragm, Disc Assembly, Stem O-rings , Seat O-ring, Cover O-ring</br>
Product Image - ARK 4000B-VT 11-4-11-2
ARK 4000B-VT 1 1/4-1 1/2

Total Relief Valve Kit

</br>4000B</br>

Seat, Seat O-ring, Stem and Diaphragm Assembly, Stem O-ring, Cover O-ring, RV Spring</br>
1 1/4 And 1 1/2 In Backflow Repair Kit, Series 4000B
LFARK 4000B-C 1 1/4-1 1/2

Cover Kit

</br>4000B, LF4000B</br>

Cover, Cover O-ring</br>
Product Image - ARK 4000B-CK2-2
ARK 4000B-CK2 2

Second Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000BM2-RC1 2
ARK 4000BM2-RC1 2

First Check Rubber Parts Kit

</br>4000B</br>

Disc, Cover O-ring, Seat O-ring</br>
Product Image - ARK 4000B-RC 2
ARK 4000B-RC 2

Second Check Rubber Parts Kit

</br>4000B</br>

Second Check Assembly O-ring, Disc Holder Assembly, Cover O-ring, Sensing Passage O-ring</br>
Product Image - ARK 4000B-Retainer 2
ARK 4000B-RETAINER 2

Retainer Kit

</br>4000B</br>

</br>
Product Image - RK-4000B
ARK 4000B-RT 2

Rubber Parts Kit

</br>4000B</br>

Diaphragm, 2 Disc, 2 Disc Assemblies, Stem O-rings, Voer O-rings, 2 Seat O-rings, RV Seat O-ring</br>
Product Image - ARK 4000B-RV 2
ARK 4000B-RV 2

Relief Valve Rubber Parts Kit

</br>4000B</br>

Diaphragm, Disc Assembly, Stem O-rings , Seat O-ring, Cover O-ring</br>
Product Image - ARK 4000B-VT 2
ARK 4000B-VT 2

Total Relief Valve Kit

</br>4000B</br>

Seat, Seat O-ring, Stem and Diaphragm Assembly, Stem O-ring, Cover O-ring, RV Spring</br>
Product Image - LFARK 4000B-C 2
LFARK 4000B-C 2

Cover Kit

</br>4000B, LF4000B</br>

Cover, Cover O-ring</br>
Product Image - ARK 4000B-C 3/4
ARK 4000B-C 3/4

Cover Kit

</br>4000B</br>

Cover, Cover O-ring</br>
4000B Product Image
ARK 4000B-CK1 3/4

First Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 400B-CK2 3-4
ARK 4000B-CK2 3/4

Second Check Kit

</br>4000B</br>

Check Assembly, Cover O-ring</br>
Product Image - ARK 4000BM2-M3RETAINER3-4
ARK 4000BM2/M3-RETAINER

Retainer Kit

</br>4000B</br>

</br>
Product Image - ARK 4000B-RC3 3-4
ARK 4000B-RC3 3/4

Check Rubber Parts Kit

</br>4000B, LF4000B</br>

Disc, Cover O-ring, Seat O-ring</br>
Product Image - ARK 4000B-RT 3-4
ARK 4000B-RT 3/4

Complete Rubber Parts Kit

</br>4000B</br>

Diaphragm, 2 Disc, 2 Disc Assemblies, Stem O-rings, Cover O-rings, 2 Seat O-rings, RV Seat O-ring</br>
Product Image -ARK 4000B-RV 3-4_7016370
ARK 4000B-RV 3/4

Relief Valve Rubber Parts Kit

</br>4000B</br>

Diaphragm, Disc Assembly, Stem O-rings , Seat O-ring, Cover O-ring</br>
Product Image - ARK 4000B-VT 3-4
ARK 4000B-VT 3/4

Total Relief Valve Kit

</br>4000B</br>

Seat, Seat O-ring, Stem and Diaphragm Assembly, Stem O-ring, Cover O-ring, RV Spring</br>
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For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. Some certification agencies allow you to search by product name and brand.