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Product Image - 4000B,LF4000B
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4000B

Bronze Reduced Pressure Zone Assembly Backflow Preventers

Features

  • 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
  • Durable, bronze body construction
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Series 4000B Reduced Pressure Zone Assemblies prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. It consists of bronze body construction, two, in-line independent check valves, replaceable check seats with an intermediate relief valve, and ball valve test cocks. Series 4000B is ideal for protection of health hazard cross-connections or for containment at the service line entrance. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific 4000B

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Model Product Used On - Series or Model Kit Contents
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 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-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 1
ARK 4000B-C 1

Cover Kit

</br>4000B</br>

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

First Check Kit

</br>4000B</br>

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

Second Check Kit

</br>4000B</br>

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

First Check Rubber Parts Kit

</br>4000B</br>

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

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 1
ARK 4000B-RETAINER 1

Retainer Kit

</br>4000B</br>

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

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
ARK 4000B-RV 1

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 1
ARK 4000B-VT 1

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 - 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 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-Retainer 3-4
ARK 4000B-RETAINER 3/4

Retainer Kit

</br>4000B</br>

</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>
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 4000BM2-M3RETAINER3-4
ARK 4000BM2/M3-RETAINER

Retainer Kit

</br>4000B</br>

</br>
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