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what is a backflow preventer

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GF 369 Plate Check Valve PVC-U/EPDM PN6 DN90 Non-Spring Design – Industrial Backflow Prevention Solution for Corrosive Media
Xiamen ZhiCheng Automation Technology Co., Ltd

GF 369 Plate Check Valve PVC-U/EPDM PN6 DN90 Non-Spring Design – Industrial Backflow Prevention Solution for Corrosive Media
Model：369 Plate check valve PVC-U/EPDM PN6 No spring
MOQ：1
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Compact Stucture Stainless Non Return Damper Reliable Backflow Prevention For Piping Systems
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Fabia Valve Industry (Suzhou) Co., Ltd.

Compact Stucture Stainless Non Return Damper Reliable Backflow Prevention For Piping Systems
Model：80mm ～ 200mm
MOQ：1 set
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Professional Safety Backflow Preventer High Strength Long Life Span
ANHUI SIFA VALVE.CO., LTD.

Professional Safety Backflow Preventer High Strength Long Life Span
Model：Fig. 9041
MOQ：5PCS
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Automaitc Duckbill Check Valve Backflow Prevention Flexible Muff Coupling Slow Closing
Shanghai Songjiang Jingning Shock Absorber Co.,Ltd.

Automaitc Duckbill Check Valve Backflow Prevention Flexible Muff Coupling Slow Closing
Model：XH
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Filtration Backflow Prevention Brass Angle Valves
ZHEJIANG DOUBLE-LIN VALVES CO.,LTD.

Filtration Backflow Prevention Brass Angle Valves
Model：LL3501
Certification：ACS, EAC, CE
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Semi Permanent Makeup Machine Needles #9U Backflow Prevention Machine Needles
Guangzhou Wenshen Cosmetics Co., Ltd.

Semi Permanent Makeup Machine Needles #9U Backflow Prevention Machine Needles
Model：CTM074-9U
MOQ：10 Pieces
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Backflow Prevention Nozzle Check Valve With Anti Water Hammer
Suzhou Alpine Flow Control Co., Ltd

Backflow Prevention Nozzle Check Valve With Anti Water Hammer
Model：NSCV
MOQ：1
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Pmu Machine Permanent Makeup Needle 3R With Membrane Backflow Prevent
Guangzhou Nuojo Beauty Equipment Co., Ltd

Pmu Machine Permanent Makeup Needle 3R With Membrane Backflow Prevent
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STEP Plastic Mould Products Medical Backflow Preventer
Guangzhou Herong Intelligent Device Technology Co., Limited

STEP Plastic Mould Products Medical Backflow Preventer
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Duckbill Valve Molded Rubber Parts One Way Check For Liquid And Gas Backflow Prevent
Goodyou Elastomer Technology Solution Co.,Ltd.

Duckbill Valve Molded Rubber Parts One Way Check For Liquid And Gas Backflow Prevent
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MOQ：1000pcs
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Backflow Prevent Natural Gas Pipeline Valves
ZIGONG WEITE VALVE MFG CO., LTD

Backflow Prevent Natural Gas Pipeline Valves
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Customized Backflow Prevention Hydraulic Control Check Drain Valve for Manufacturers
Mingyi Machinery (Tianjin) Co., Ltd

Customized Backflow Prevention Hydraulic Control Check Drain Valve for Manufacturers
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High Capacity Lamella Clarifier System for Pulp Reuse Wastewater Treatment Capacity 0.5-100m3/h No Sludge Backflow Prevention
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Shanghai Ecopro Environmental Engineering Co., Ltd.

High Capacity Lamella Clarifier System for Pulp Reuse Wastewater Treatment Capacity 0.5-100m3/h No Sludge Backflow Prevention
Supply Ability：5000 Set/Sets per Year
MOQ：1 unit
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yomtey brass antifouling block vavle(backflow preventer)
Dongguan Ameike Valve Co., Ltd

yomtey brass antifouling block vavle(backflow preventer)
Model：Y9402
MOQ：1000pcs
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Brass Check Valve ,Vertical Check Valve, Non Return Valve,Backflow Prevention Valve,Swing Check Valve,Retaining Valve
Shanghai APS Eco-tech Co., Ltd

Brass Check Valve ,Vertical Check Valve, Non Return Valve,Backflow Prevention Valve,Swing Check Valve,Retaining Valve
Model：Checking Valve-1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
MOQ：50PCS
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Professional 3 Inch Hydraulic Check Valves Preventing Backflow With FPM Gasket
DONJOY TECHNOLOGY CO., LTD

Professional 3 Inch Hydraulic Check Valves Preventing Backflow With FPM Gasket
Model：NO.VZH200A01
MOQ：1
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High Performance Sanitary Ball Check Valve Stainless Steel , Prevent Backflow
Nyhau Fluid Equipment Co.,Ltd

High Performance Sanitary Ball Check Valve Stainless Steel , Prevent Backflow
Supply Ability：10000PCS/Mouth
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5.3Mpa FM200 System Liquid Flow Check Valve Prevent Backflow Of Fire Extinguishing Agent
Guangdong Air Giant Fire Equipment Co.,Ltd.

5.3Mpa FM200 System Liquid Flow Check Valve Prevent Backflow Of Fire Extinguishing Agent
Model：QYD40/5.3
MOQ：50 pieces
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Ideal Diode Module 40V 80V 280A Solar photovoltaic Base Station Electric Vehicle Prevent Anti-backflow
Shenzhen Juyi Science And Trade Co., Ltd.

Ideal Diode Module 40V 80V 280A Solar photovoltaic Base Station Electric Vehicle Prevent Anti-backflow
Model：EK-iD40V/80V 280A
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