93 backwater valve on offer(Disclaimer)
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➤ Last checked on 06.10.2026
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Legend Valve 202-251 1-1/2" S-640 Backwater Valve
Constructed of ASTM D1784 virgin resins that will not rust, corrode or pit.
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Oatey 43901 ABS Backwater Valve, 3-Inch
Protects low areas or basements from backflow or waste from street sewers.
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Canplas 223284W PVC Backwater Valve, 4-Inch
Protection against the backflow of sewage and storm water
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Oatey 43908 Backwater Valve, White, 6 in
6 in. PVC backwater valve
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Oatey 43905 ABS Backwater Valve, 4-Inch
Protects low areas or basements from backflow or waste from street sewers.
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Jones Stephens Corp - 3 Pvc Backwater Valve
Jones Stephens
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Oatey 43904 PVC Backwater Valve, White, 4 Inch
4 in. PVC backwater valve Protects low areas or basements from backflow or waste from street sewers Elastomeric seal in quick action flapper ensures a water tight seal Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand Valve hub fits DWV pipe and can be adapted for sewer and drain pipe
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PVC Plastic Check Flap Valve Self Activating End Drainage Backwater 110mm
Flap valves of Karmat are innovative devices protecting rooms on the lower levels; Installed at the end of 110mm sanitary sewage pipes leading storm water to ditches or rivers; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; High quality PVC Plastic and stainless steel ending, sun light/high temperature resistance
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Jones Stephens Corp - 4 Pvc Backwater Valve
Jones Stephens
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PVC Plastic Check Flap Valve Self Activating End Drainage Backwater 160mm
Flap valves of Karmat are innovative devices protecting rooms on the lower levels; Installed at the end of 160mm sanitary sewage pipes leading storm water to ditches or rivers; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; High quality PVC Plastic and stainless steel ending, sun light/high temperature resistance
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PVC Plastic Check Flap Valve Self Activating End Drainage Backwater 200mm
Installed at the end of 200mm sanitary sewage pipes leading storm water to ditches or rivers; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; High quality PVC Plastic and stainless steel ending, sun light/high temperature resistance
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Jones Stephens Corp - 1-1/2 Pvc Backwater Valve
Residential Drains
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Jones Stephens Corp - 2 Abs Backwater Valve
Jones Stephens
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Oatey 43900 Backwater Valve for DWV Pipe, White, 3 Inch
3 in. PVC backwater valve
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Jones Stephens Corp - 3 Abs Backwater Valve
Residential Drains
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HYDRO MASTER PVC Backwater Valve, (2 Inch)
Backflow Prevention: This PVC backwater valve prevents sewage backflow into your home during heavy rains or sewer line blockages.
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Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm
KARMAT Backwater Valves effectively secure any rooms located on the lower floors; Installed in 110mm sewage pipes before they exit a building or sewage drains; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; Made of high-quality PVC Plastic - resistance to the effects of chemicals and hot sewage
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Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 160mm
KARMAT Backwater Valves effectively secure any rooms located on the lower floors; Installed in 160mm sewage pipes before they exit a building or sewage drains; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; Made of high-quality PVC Plastic - resistance to the effects of chemicals and hot sewage
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4" White PVC Backwater Valve, Sewage and Rainwater Backflow Preventer
【Unbeatable Sewage Backflow Protection】Prevents costly sewage & rainwater from flowing back into your property. Automatic operation delivers reliable protection 24/7 for essential peace of mind.
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PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm
Installed in 110mm sewage pipes before they exit a building or sewage drains; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; Double-flap backwater valves offer a greater choice of security devices
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Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 125mm
KARMAT Backwater Valves effectively secure any rooms located on the lower floors; Installed in 125mm sewage pipes before they exit a building or sewage drains; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; Made of high-quality PVC Plastic - resistance to the effects of chemicals and hot sewage
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3" White PVC Backwater Valve, Sewage and Rainwater Backflow Preventer
【Unbeatable Sewage Backflow Protection】Prevents costly sewage & rainwater from flowing back into your property. Automatic operation delivers reliable protection 24/7 for essential peace of mind.
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Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 200mm
KARMAT Backwater Valves effectively secure any rooms located on the lower floors; Installed in 200mm sewage pipes before they exit a building or sewage drains; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; Made of high-quality PVC Plastic - resistance to the effects of chemicals and hot sewage
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Grey Vertical Backwater Valve Anti Flood Protection Device 50mm Diameter
Diameter: 50mm
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PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm
Installed in 160mm sewage pipes before they exit a building or sewage drains; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; Double-flap backwater valves offer a greater choice of security devices
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Jones Stephens, JS Flapper with Gasket for 3" Backwater Valve - B04301
Residential Drains
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White Vertical Backwater Valve Anti Flood Protection Device 50mm Diameter
Diameter: 50mm
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BYLSAGWHT Ball valve with water filter Floor heating valve DN25 brass(PP-R25X1,Backwater valve)
BYLSAGWHT
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Cinsda 4" PVC Backwater Valve, 4 Inch Back Flow Preventer Valve, Backflow Water Valve Prevents Sewage Backflow
Designed for connecting 4-inch PVC drains in the drainage system, this valve prevents the backflow of water in the pipeline due to pressure reduction or other potential causes.
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110mm Polypropylene Check Non-Return Anti-Flood Flap Valve
Made of a durable polypropylene; - Resistant to corrosion, negative temperatures and chemicals; - Simple and effective closure mechanism; - No need of external power; - Effective rodent protection; - Inhibits unpleasant smells from re-entering; - Equipped with a manual closure lever; - A full-open position allows for 100% sewage flow; - Maximum operating temperature
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Horizontally Assembled Inline Anti Flood 50mm Backwater Check Valve Backflow Prevention
Anti-flood devices protect interiors from flooding caused by sewage backflow; Fitted in the horizontal course of 50mm sewage pipework attached to the wall by means of brackets; A non-return valve installed in such a way can protect several facilities at the same time; Flap cover, and all fasteners (screws, nuts, washers) are made of chromium-nickel stainless steel
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Horizontally Assembled Wall Mounted Anti Flood 50mm Backwater Check Valve Backflow Prevention
Anti-flood devices protect interiors from flooding caused by sewage backflow; Special aesthetic masking rosette allows the valve to be mounted to the wall by means of two screws; The non-return valve is connected to the 50mm pipe socket of an existing pipe fitting in the wall; flap cover, and all fasteners (screws, nuts, washers) are made of chromium-nickel stainless steel
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Tondiamo 1 Pcs 4" PVC Backwater Valve Backflow Preventer Valve, White PVC
Layered Protection Against Sewage Backflow: this PVC backwater valve is an effective backflow preventer valve that specifically designed to protect your premises from the potential threats of sewer backflow; It delivers reliable protection and peace of mind with its excellent functionality
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PVC Plastic Check Flap Self End Activate Drainage Swirl Universal 72 100mm
Installed at the end of universal 72-100mm sanitary sewage pipes leading storm water to rivers; Prevents against rodents entering building interiors through the sewage and other sanitary systems; Secure the lower floors against flooding caused by back flow of storm water and sewage; High quality PVC Plastic and stainless steel ending, sun light/high temperature resistance
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Ball Valve with Water Filter Floor Heating Valve DN25 Brass OSBCMZGE(PP-R25X1,Backwater Valve)
OSBCMZGE
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Tondiamo 1 Pcs 6" PVC Backwater Valve Backflow Preventer Valve, White PVC
Layered Protection Against Sewage Backflow: this PVC backwater valve is an effective backflow preventer valve that specifically designed to protect your premises from the potential threats of sewer backflow; It delivers reliable protection and peace of mind with its excellent functionality
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Ball Valve with Water Filter Floor Heating Valve DN25 Brass MQXFCZUX(PP-R25X1,Backwater Valve)
MQXFCZUX
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Toilet Check Valve Male Female Thread Copper One-Way Valve Backwater Backflow Check Valve 1Pcs (Color : DN20 Female X Male 5)
Valves / Check Valves
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AUOQKQUT Ball valve with water filter Floor heating valve DN25 brass (PP-R32X1,Backwater valve)
AUOQKQUT
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110mm Vertically Assembled Anti Flooding Backwater Drain Check Valve Backflow Prevention
A backwater valve mounted on a vertical drain pipe is a comfortable; Cheap and often the only way of protecting a building against flooding; Installed onto sewer pipes; Vertically mounted operate automatically and reliably, protecting facilities against flooding; The possibility of mounting on a vertical pipe means no need for conversions and lower costs; Diameter: 110mm; Mounting: vertical.
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4" PVC Backwater Valve Drain Backflow Preventer Valve, White
Durable PVC Material: Our PVC Backwater Valve is crafted from high-quality, corrosion-resistant PVC, ensuring long-lasting durability. With a thickness of 0.2 inches, it withstands high pressure without risk of damage, making it the affordable solution for your drainage needs
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EKFBQBGW Ball valve with water filter Floor heating valve DN25 brass (PE-RT32X1,Backwater valve)
EKFBQBGW
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Elbow Wall Mounted Anti Flood 50mm Backwater Check Valve Backflow Prevention
Anti-flood devices protect interiors from flooding caused by sewage backflow;
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Buffalo Retro fit -Non Return Valve to fit 6 inch (150mm) Sewerage Pipe. Rodent and Water Stop.
Fits: 136mm - 152.5mm internal diameter of pipe (6 inch /150mm).
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Whychstore PVC 2 inch Backwater Valve, Back Flow Preventer, Check Valve, White
[LAYERED PROTECTION]: Designed to forestall sewer backflow, this PVC backwater valve provides multiple layers of defense for your drainage system. It effectively blocks sewage from flowing back into your premises, safeguarding your property against potential health hazards and water damage.
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AQXYWUIO Hot and Cold Logo Angle Valves Brass Chrome Plated Valve Bathroom Accessories Angle Valve for Toilet Sink Prevent Backwater(Cold)
Stainless steel structure: The material is durable and drip-proof, which is very suitable for long-term contact with water.
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4 Inch Pvc Backwater Valve,Sewer Check Back Flow Preventer Drain Backflow Preventer Valve,Prevent Sewage And Rainwater From Flowing Backflow
Robust Protection Against Sewage Backflow:Our PVC sewer check valve prevents sewage from flowing back through the plumbing system, preventing serious damage to your home and health hazards.
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3" PVC Backwater Valve,4-Inch Drain Backflow Preventer Valve Prevent Sewage and Rainwater from Flowing Back
【Prevent water backflow】This PVC backwater valve designed for connecting 4-inch PVC drains in the drainage system, this valve prevents the backflow of water in the pipeline due to pressure reduction or other potential causes.It's an effective backflow preventer valve that specifically designed to protect your premises from the potential threats of sewer backflow.
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve(DN20 Male X Male 4)
FOPURE
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AQXYWUIO Hot and Cold Logo Angle Valves Brass Chrome Plated Valve Bathroom Accessories Angle Valve for Toilet Sink Prevent Backwater(Hot)
Stainless steel structure: The material is durable and drip-proof, which is very suitable for long-term contact with water.
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1pcs for All Copper Floor Heating Water Separator Valve Accessories Filter Sleeve Geothermal Backwater Ball
Valve
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Reliable PVC Backwater Valve to Prevent Drainage Backflow in Various Applications (1-1/2 inch)
[LAYERED PROTECTION AGAINST SEWAGE BACKFLOW] This PVC backwater valve is expertly engineered to prevent sewer backflow, your premises are shielded from potential sewage threats while providing peace of mind with its reliable functionality.
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BKGWCSOR 1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-way Valve Backwater Backflow Check Valve(DN15 Male X Male 2)
BKGWCSOR
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Jones Stephens B04200 2 PVC BACKWATER Valve
Reduces backflow in drainage system; Sockets are Schedule 40 DWV
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SDGBCXD， Hot and Cold Logo Angle Valves Brass Chrome Plated Valve Bathroom Accessories Angle Valve for Toilet Sink Prevent Backwater(Hot),Valve(Cold)
The surface is treated to make the surface smooth and delicate, which can provide a good touch.
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AQXYWUIO Bathroom Angle Valve 1/2 Inch Interface Brass Valve Core Anti-Backwater Accessories Suitable for Toilets and Washbasins
1. 1/2" inlet and 1/2" outlet.
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Jones Stephens B04401K 4" PVC Backwater Valve with Extension Kit and Plastic Lid
Jones Stephens
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QMIQXIWS 1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-way Valve Backwater Backflow Check Valve ZUZAOJUYIN(DN15 Male X Male 2)
QMIQXIWS
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SDGBCXD， Hot and Cold Logo Angle Valves Brass Chrome Plated Valve Bathroom Accessories Angle Valve for Toilet Sink Prevent Backwater(Hot),Valve(Hot)
The surface is treated to make the surface smooth and delicate, which can provide a good touch.
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Alvinlite Visible Check Valve Replacement Backwater Non Return Indoor Outdoor Swimming Pool Accessories One Way Pipe
Made of high quality ABS and PVC material, prevent corrosion, rugged and durable
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110mm Non Return Valve Backflow Flood Prevention Single Stainless Steel Flap
Durable Construction: Crafted from robust Stainless Steel, ensuring longevity and resistance to corrosion
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Jones Stephens, JS 3" PVC Backwater Valve with Extension Kit and Plastic Lid - B04301K
Residential Drains
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NULYLU Outdoor Plastic Drain Cover, Gully Drain Grate for Kitchen Garden, Black Channel Grate, Easy to Clean, Conceals Trench Appearance
Plastic drain grate:the service life is relatively long, which can reduce maintenance costs,sturdy sewer cover
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XFMZFUBD 3pcs Floor Drain Core Stainless Steel Strainer Metal Sink Strainer Filter for Sink Backwater Valve Floor Floor Drainer Bathtub Drain Stopper Floor Drain Plugs White(Blanc)
Drainage
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PVC water return Valve, Backwater Valve, Back Flow Preventer Valve, Backflow Water Valve Prevents Sewage Backflow (3 inch)
[LAYERED PROTECTION]: Designed to forestall sewer backflow, this PVC backwater valve provides multiple layers of defense for your drainage system. It effectively blocks sewage from flowing back into your premises, safeguarding your property against potential health hazards and water damage.
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XFMZFUBD 3pcs Floor Drain Core Stainless Steel Strainer Metal Sink Strainer Filter for Sink Backwater Valve Floor Floor Drainer Bathtub Drain Stopper Floor Drain Plugs White(Nero)
Drainage
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XFMZFUBD 1 Set Floor Drain Connector Drain Backflow Valve Kitchen Sink Strainer Drain Backwater Valve Washing Machine Filter Strainer Floor Drain Snap Adapter Floor Drain Joint Sink
Drainage
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Zejoot PVC Backwater Valve,3 inch Drain Backflow Preventer, Backflow Preventer Valve Prevents Sewage and Rainwater from Flowing Back
Durable PVC Material: Our PVC Backwater Valve is crafted from high-quality, corrosion-resistant PVC, ensuring long-lasting durability. With a thickness of 0.2 inches, it withstands high pressure without risk of damage, making it the affordable solution for your drainage needs
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Drainage Backwater Valve, PVC Backwater Valve Drainage Anti-backflow Valve To Prevent Sewage Backflow Accessory For Industry(3 inch)
Layered Protection Against Sewage Backflow: The PVC backwater valve effectively prevents sewer backflow.
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Tondiamo 1 Pcs 3" PVC Backwater Valve Backflow Preventer Valve, White PVC
Layered Protection Against Sewage Backflow: this PVC backwater valve is an effective backflow preventer valve that specifically designed to protect your premises from the potential threats of sewer backflow; It delivers reliable protection and peace of mind with its excellent functionality
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ANWUYANG 1PCS PVC Angle Flap Check Valve, ID 50mm Transparent Anti-backflow Check Valve, Kitchen Sewer Pipe Check Valve Backwater Drainage
PVC transparent check valve material: The use of high-quality PVC raw materials, green and environmental protection, transparent and visible, can intuitively drain the effect, save worry and effort.
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve(DN20 Male X Male 4)
BYLSAGWHT
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve(DN15 Female X Male 3)
BYLSAGWHT
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve(DN20 Female X Male 5)
OOYIALET
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-way Valve Backwater Backflow Check Valve(DN20 Female X Male 5)
PQYSMVVG
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Drainage Backwater Valve,PVC Backwater Valve Drainage, Anti-backflow Valve,For Domestic,Commercial To Prevent Sewage Backflow(1-1/2 inch)
【Protection Against Sewage Backflow】: Safeguard your property with our advanced PVC backwater valve, expertly engineered to prevent sewage backflow. This innovative device ensures that your premises remain safe from potential sewage threats, providing you with peace of mind and reliable protection against unwanted hazards.
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High performance PVC Backwater Valve to Prevent Sewer Issues Choice for Various Drainage Applications (3 inch)
[LAYERED PROTECTION] Safeguard your premises with this PVC backwater valve designed to prevent sewage backflow, reliable protection and peace of mind.
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BKGWCSOR 1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-way Valve Backwater Backflow Check Valve(DN15 Female X Male 3)
BKGWCSOR
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve ICXLPMC(DN15 Male X Female 1)
ICXLPMC
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OSBCMZGE 1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-way Valve Backwater Backflow Check Valve (DN15 Female X Male 3)
OSBCMZGE
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve MQXFCZUX(DN20 Male X Male 4)
MQXFCZUX
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve EKFBQBGW(DN15 Female X Male 3)
EKFBQBGW
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1PCS Toilet Check Valve 1/2" 3/4" Male Female Thread Copper Nickel Plated One-Way Valve Backwater Backflow Check Valve RNUMLIGH(DN15 Male X Male 2)
RNUMLIGH
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PVC Backwater Valve to Prevent Sewage Issues Suitable for Irrigation, Horticulture, and Water Treatment (3 inch)
[EFFECTIVE SEWAGE BACKFLOW PROTECTION] This PVC backwater valve is engineered to effectively prevent sewer backflow, keeping your environment safe from unwanted sewage incidents while offering peace of mind.
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PVC Backwater Valve for Drainage Systems | 1-1/2", 2", 3" Sizes | Anti-Backflow Preventer for Sewage, Domestic & Industrial Use(3 inch)
RELIABLE For SEWAGE PROTECTION: PVC Backwater Valve forestalls wastewater returning to your property, keeping drainage systems safe in residential, commercial or industrial setups
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Entgoinggo Antibackflow PVC Valve for Long Lasting Drain for Protection Against Sewage,DN40 DN50 DN80 White Plumbing Fittings(3 inch)
[RELIABLE SEWAGE BACKFLOW PREVENTION] This PVC backwater valve is specifically designed to prevent sewer backflow, safeguarding your property from potential hazards and providing dependable for PROTECTION.
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Adjustable Small Submersible Pump Agricultural Electric Water Pump Black Micro High Pressure Diaphragm Sprayer Car Wash(24V Backwater Valve)
1. Small size, high efficiency, low noise, compact design and easy to use.
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PVC Backwater Valve 1-1/2", 2", 3" DN40 DN50 DN80 White Anti-Backflow Drainage Valve for Sewage Prevention in Domestic, Commerci(3 INCH)
LAYERED PROTECTION AGAINST For SEWAGE BACKFLOW: This PVC backwater valve is expertly engineered to sewer backflow, your premises are shielded from potential For sewage threats while providing peace of mind with its reliable functionality.
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Jones Stephens B04300K Jones Stephens B04300K 3 BACKWATER Valve With Sleeve and Cast Iron LID
Brand:Jones
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Hoppipola PVC Backwater Valve DN40/DN50/DN80 Anti-Backflow Drain Fitting for Sewage Prevention in Domestic & Industrial Systems(3 inch)
[EFFECTIVE SEWAGE BACKFLOW PROTECTION] This PVC backwater valve is engineered to effectively prevent sewer backflow, keeping your environment safe from unwanted sewage incidents while offering peace of mind.
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Manual Backdraft Damper for HVAC Ductwork Extractor Fan Ventilation System Air Control Non Return Backwater Valve Flap Duct Prevention White 160mm
ELIMINATES ODORS BACKDRAFT: This one-way check valve effectively prevents outside air, bad smells, dust, and pests from flowing back into your room. It ensures that exhaust air from your bathroom fan, kitchen hood, or dryer only moves outward, keeping your home smelling fresh.
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SSIMOO Backwater Locking Valve Angle Type DN15 DN20 1216 1620 Thermostat Radiator Value Adapter Brass Faucet Water Supply Ball Valve kindly (Size : 1216DN15)
SSIMOO
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Innconee 2 Inch Backwater Valve White PVC Drain Backflow Preventer for Sewage and Rainwater Automatic Sewer Backflow Prevention Valve for Residential Commercial Use
Reliable Sewage Backflow Protection: designed with dependable backwater valve technology, this system ensures your environment remains free from unexpected sewage backflows; It's an ideal solution for safeguarding your home, business, or industrial space
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We have found a total of 93 backwater valves deals at amazon, B & Q, ONBuy UK, and other shops for you. The most popular brands include: PLUMBING4HOME, Jones Stephens, and Oatey. The lowest price we found in our offers is £ 24.39 . The highest price in our price comparison is £ 339.65 . Currently, we have selected 6 reliable shops for you to buy backwater valves affordably.