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FaucetsAir ToolsAll Tool SetsAmerican StandardBathroom Cabinets & FixturesBathroom HardwareBathroom PlumbingCaulking & SealantsDeckingDelta Home ImprovementDesigner Plumbing Fixtures & HardwareElectrical ToolsEmergency SuppliesEvaporative Coolers and PartsGarage Storage SystemsGroheGuttering & DrainageHand ToolsHVAC Ducting and VentilationInsulationKitchen Fixtures and MaterialsKitchen PlumbingMayfairMechanics ToolsMoen Home ImprovementOutdoor DrainagePaint Supplies & ToolsPipes, Fittings & AccessoriesPlumbing Tools & AccessoriesPower Tool AccessoriesPower ToolsProjectsRoofingSealants, Fillers and AdhesivesShop Plumbing BrandsShop Plumbing by FixtureStorage ContainersStorm & Flood PrepTestersToilets and BidetsUtility FixturesUtility Sinks & FaucetsValves & Valve RepairWater FiltersWater Filtration & Water SoftenersWater HeatersWater Heaters, Pumps & TanksWeatherproof CoversWelding & Cutting AccessoriesWinter Prep
Backflow Plumbing(443)
Uses item details. Price when purchased online
Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes $16.96
Sponsored
$1696
current price $16.96Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes
54.8 out of 5 Stars. 5 reviews
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RV Camper 1/2 Inch Thread Plastic Check Valve Backflow Preventer Black PN 94211 $11.34 Was $12.60
Sponsored
Now$1134
current price Now $11.34, Was $12.60$12.60
RV Camper 1/2 Inch Thread Plastic Check Valve Backflow Preventer Black PN 94211
Best seller KFFKFF 12" Frost-Proof Outdoor Faucet with Anti-Siphon and Backflow Prevention, 1/2" Push-to-Fit Connector x 3/4" Hose Bibb, Lead-Free Spigot for PEX, Copper, and CPVC Pipes $24.99
Sponsored
$2499
current price $24.99KFFKFF 12" Frost-Proof Outdoor Faucet with Anti-Siphon and Backflow Prevention, 1/2" Push-to-Fit Connector x 3/4" Hose Bibb, Lead-Free Spigot for PEX, Copper, and CPVC Pipes
84.4 out of 5 Stars. 8 reviews
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DANSPEED 1-1/2" 1.5 inch Stainless Steel Vertical Check Valve NPT Spring Loaded In-line From $12.49
Sponsored
From$1249
DANSPEED 1-1/2" 1.5 inch Stainless Steel Vertical Check Valve NPT Spring Loaded In-line
25 out of 5 Stars. 2 reviews
Clearance Inerposs Drains Backflow Preventer, One Way Drain Valve for Shower Floor Water Drainage, Orange (1PC) Was $4.64
Inerposs Drains Backflow Preventer, One Way Drain Valve for Shower Floor Water Drainage, Orange (1PC)
Drain Backflow Preventer 1 Pack - One Way Drain Sewer Core for Floor Drainage - Odor and Insect Stopper for Shower Kitchen Bathroom Basement Toilet Sink Drain From $5.44
From$544
Drain Backflow Preventer 1 Pack - One Way Drain Sewer Core for Floor Drainage - Odor and Insect Stopper for Shower Kitchen Bathroom Basement Toilet Sink Drain
Tuphregyow Floor Drain Backflow Preventer - One-Way Valves Sewer Core for Bathroom, Kitchen, and Basement Water Drainage. Black
Tuphregyow Floor Drain Backflow Preventer - One-Way Valves Sewer Core for Bathroom, Kitchen, and Basement Water Drainage. Black
Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker From $10.74
From$1074
Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker
214.4 out of 5 Stars. 21 reviews
Watts Backflow System Low Pressure, 1-1/4 In. Fip, Lead Free
Watts Backflow System Low Pressure, 1-1/4 In. Fip, Lead Free
3/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff with Freeze Sensor $249.99
$24999
current price $249.993/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff with Freeze Sensor
Merrill Mfg CVNL100 No Lead Brass Check Valve for Well, 1", 700 Series $20.00
Sponsored
$2000
current price $20.00Merrill Mfg CVNL100 No Lead Brass Check Valve for Well, 1", 700 Series
104.9 out of 5 Stars. 10 reviews
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VEVOR Anti-Siphon Frost-Proof Sillcock, 12" Freeze Proof Outdoor Faucet Bib with Backflow Preventer, 1/2" Push-to-Fit Connector X 3/4" Hose Bibb, No Lead Frost-free Spigot for PEX Copper CPVC Pipes $31.90
Sponsored
$3190
current price $31.90VEVOR Anti-Siphon Frost-Proof Sillcock, 12" Freeze Proof Outdoor Faucet Bib with Backflow Preventer, 1/2" Push-to-Fit Connector X 3/4" Hose Bibb, No Lead Frost-free Spigot for PEX Copper CPVC Pipes
33.7 out of 5 Stars. 3 reviews
Anti-backflow Floor Drain,magnetic Levitation Smell Proof,shower Sink Check Valve,one Way Sewer Seal Plug $34.68
$3468
current price $34.68Anti-backflow Floor Drain,magnetic Levitation Smell Proof,shower Sink Check Valve,one Way Sewer Seal Plug
ARROWHEAD BRASS & PLUMBING 58ABP Backflow Preventer, Non Anti-Siphon, 3/4 In. Hose Thread $23.28
$2328
current price $23.28ARROWHEAD BRASS & PLUMBING 58ABP Backflow Preventer, Non Anti-Siphon, 3/4 In. Hose Thread
Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes $16.96
$1696
current price $16.96Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes
54.8 out of 5 Stars. 5 reviews
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Watts 1 in. D X 1 in. D FNPT x FNPT Brass Backflow Preventer Double Check Valve $299.95
$29995
current price $299.95Watts 1 in. D X 1 in. D FNPT x FNPT Brass Backflow Preventer Double Check Valve
Clearance Floor Drain Backflow Preventer Valve, Anti-Odor Plug for Shower, Kitchen, and Bathroom Drainage, Easy to Install, Universal Sewer Core Insert From $4.98
From$498
Floor Drain Backflow Preventer Valve, Anti-Odor Plug for Shower, Kitchen, and Bathroom Drainage, Easy to Install, Universal Sewer Core Insert
Clearance Shower Floor Drain Valve One Way Backflow Preventer Anti Odor Insect Proof Sewer Core Insert Bathroom Kitchen Drain Filter Replacement Anti Smell Water Blocker Plumbing Accessory Was $8.15
Shower Floor Drain Valve One Way Backflow Preventer Anti Odor Insect Proof Sewer Core Insert Bathroom Kitchen Drain Filter Replacement Anti Smell Water Blocker Plumbing Accessory
Plumbing Backwater Valve 3 Inch, PVC Backflow Preventer, Sewer Drain Check Valve, White - Leak Proof Protection for Home & Business $42.49
$4249
current price $42.49Plumbing Backwater Valve 3 Inch, PVC Backflow Preventer, Sewer Drain Check Valve, White - Leak Proof Protection for Home & Business
Uxcell Floor Drain Anti-Odor Core, Shower Floor Drain Backflow Preventer, Black 4 Pack From $10.79
2 options
Available in additional 2 optionsFrom$1079
Uxcell Floor Drain Anti-Odor Core, Shower Floor Drain Backflow Preventer, Black 4 Pack
41.3 out of 5 Stars. 4 reviews
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Inline Check Valve w/ 1/4" Quick Connect Push Connect Fittings for Reverse Osmosis Systems $16.99
Sponsored
$1699
current price $16.99Inline Check Valve w/ 1/4" Quick Connect Push Connect Fittings for Reverse Osmosis Systems
The Bosworth Co., Foot/Check Valve for Guzzler 400, 1-1/8", MPN 74-9 $23.20
Sponsored
$2320
current price $23.20The Bosworth Co., Foot/Check Valve for Guzzler 400, 1-1/8", MPN 74-9
Drains Backflow Preventer, One Way Shower Floor Drain Valve, Sewer Core for Preventing Odors and Insect Backflow, Durable Metal+PC Construction, 7.5x3cm
Drains Backflow Preventer, One Way Shower Floor Drain Valve, Sewer Core for Preventing Odors and Insect Backflow, Durable Metal+PC Construction, 7.5x3cm
IPW Industries Inc. | SMC 6850090 Inline Poppet Backflow Preventer Check Valve for Home Improvement, Water Pump System, Kitchen Plumbing & Irrigation $22.00
$2200
current price $22.00IPW Industries Inc. | SMC 6850090 Inline Poppet Backflow Preventer Check Valve for Home Improvement, Water Pump System, Kitchen Plumbing & Irrigation
1/2inch Brass Backflow Preventer Reinforced Design Suitable For Plumbing And Pipe Configurations From $9.98
From$998
1/2inch Brass Backflow Preventer Reinforced Design Suitable For Plumbing And Pipe Configurations
yaaqii PVC Check Valve Backflow Prevention Valve Backflow Water Valve Prevent Backflow From $16.75
2 options
Available in additional 2 optionsFrom$1675
yaaqii PVC Check Valve Backflow Prevention Valve Backflow Water Valve Prevent Backflow
Best seller KFFKFF 12" Frost-Proof Outdoor Faucet with Anti-Siphon and Backflow Prevention, 1/2" Push-to-Fit Connector x 3/4" Hose Bibb, Lead-Free Spigot for PEX, Copper, and CPVC Pipes $24.99
$2499
current price $24.99KFFKFF 12" Frost-Proof Outdoor Faucet with Anti-Siphon and Backflow Prevention, 1/2" Push-to-Fit Connector x 3/4" Hose Bibb, Lead-Free Spigot for PEX, Copper, and CPVC Pipes
84.4 out of 5 Stars. 8 reviews
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Yajisi DN32 Female Thread Brass Swing Check Valve 1-1/4 Inch 232PSI One-Way Non-Return Prevent Water Backflow For Home Plumbing Industrial Use Heavy Duty 15.7oz $22.28
$2228
current price $22.28Yajisi DN32 Female Thread Brass Swing Check Valve 1-1/4 Inch 232PSI One-Way Non-Return Prevent Water Backflow For Home Plumbing Industrial Use Heavy Duty 15.7oz
VEVOR Anti-Siphon Frost-Proof Sillcock, 12" Freeze Proof Outdoor Faucet Bib with Backflow Preventer, 1/2" Push-to-Fit Connector X 3/4" Hose Bibb, No Lead Frost-free Spigot for PEX Copper CPVC Pipes $31.90
$3190
current price $31.90VEVOR Anti-Siphon Frost-Proof Sillcock, 12" Freeze Proof Outdoor Faucet Bib with Backflow Preventer, 1/2" Push-to-Fit Connector X 3/4" Hose Bibb, No Lead Frost-free Spigot for PEX Copper CPVC Pipes
33.7 out of 5 Stars. 3 reviews
Virelaxpo Silent Sump Pump Check Valve 1.5 Inch Clear Body with Stainless Steel Clamps for Backflow Prevention and Plumbing Installation Water System From $21.00
From$2100
Virelaxpo Silent Sump Pump Check Valve 1.5 Inch Clear Body with Stainless Steel Clamps for Backflow Prevention and Plumbing Installation Water System
High Performances 180 Degree Check Valves ABS Materials Clear Lid Portable for Pool Plumbing Backflow Prevention $38.30
$3830
current price $38.30High Performances 180 Degree Check Valves ABS Materials Clear Lid Portable for Pool Plumbing Backflow Prevention
Backflow Preventer Valves for Shower & Floor Drains | One-Way Sewer Check Valves | Metal+PC Construction | Prevents Odors & Backflow
Backflow Preventer Valves for Shower & Floor Drains | One-Way Sewer Check Valves | Metal+PC Construction | Prevents Odors & Backflow
Uxcell 2-Pack Brass Check Valve, 1/2" Male to 1/2" Male Thread One Way Non-Return Backflow Preventer Valve [Gold] $11.49
![Uxcell 2-Pack Brass Check Valve, 1/2" Male to 1/2" Male Thread One Way Non-Return Backflow Preventer Valve [Gold]](https://i5.walmartimages.com/seo/Uxcell-2-Pack-Brass-Check-Valve-1-2-Male-to-1-2-Male-Thread-One-Way-Non-Return-Backflow-Preventer-Valve-Gold_60d7ab8f-3159-4d4a-8bd8-41d5be9eea48.a94d3839d5509db131db6f1b8480a2e8.jpeg?odnHeight=576&odnWidth=576&odnBg=FFFFFF)
$1149
current price $11.49Uxcell 2-Pack Brass Check Valve, 1/2" Male to 1/2" Male Thread One Way Non-Return Backflow Preventer Valve [Gold]
SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style) $134.99
$13499
current price $134.99SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style)
Riousery Sink Drain Pipe Prevent Backflow Bad Odor Removal Leakage Proof Expandable Downcomer Pipe for Home Use, 4 Pieces, 11.6-38.8 inches / 295-985 mm $13.08 Was $18.02
Now$1308
current price Now $13.08, Was $18.02$18.02
Riousery Sink Drain Pipe Prevent Backflow Bad Odor Removal Leakage Proof Expandable Downcomer Pipe for Home Use, 4 Pieces, 11.6-38.8 inches / 295-985 mm
SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style) $119.99
$11999
current price $119.99SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style)
deevoka PVC Drainage Pipe Floor Drain Backflow Preventer Valve for Plumbing Fixtures XL
deevoka PVC Drainage Pipe Floor Drain Backflow Preventer Valve for Plumbing Fixtures XL
YAHHU Golden Brass One Way Female Thread Swing Check Valve DN15 Heavy Duty Water Backflow Preventer Pipe Fitting, 1.97 inches / 5 cm Length, Corrosion Resistant Check Valve Parts for Plumbing $10.89
$1089
current price $10.89YAHHU Golden Brass One Way Female Thread Swing Check Valve DN15 Heavy Duty Water Backflow Preventer Pipe Fitting, 1.97 inches / 5 cm Length, Corrosion Resistant Check Valve Parts for Plumbing
Drains Backflow Preventer, One-Way Shower Floor Drain Valve, ABS Sewer Core, Odor and Insect Blocker for Kitchen, Bathroom, Garage, 1 Pc, Orange
Drains Backflow Preventer, One-Way Shower Floor Drain Valve, ABS Sewer Core, Odor and Insect Blocker for Kitchen, Bathroom, Garage, 1 Pc, Orange
15 out of 5 Stars. 1 reviews
Full Port Utility Valve, Solvent Connections Stainless Steel Spring Loaded Backflow Preventer, Ideal For Commercial And Home Plumbing (20mm) $19.99
$1999
current price $19.99Full Port Utility Valve, Solvent Connections Stainless Steel Spring Loaded Backflow Preventer, Ideal For Commercial And Home Plumbing (20mm)
SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style) $64.99
$6499
current price $64.99SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style)
Universal Straight Odor Proof Floor Drain Cover with Automatic Closure | 360° Quick Drainage | Sewer Gas & Backflow Prevention | Easy to Install for Bathroom, Kitchen, Laundry & Basement From $4.29
From$429
Universal Straight Odor Proof Floor Drain Cover with Automatic Closure | 360° Quick Drainage | Sewer Gas & Backflow Prevention | Easy to Install for Bathroom, Kitchen, Laundry & Basement
15 out of 5 Stars. 1 reviews
SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style) $134.99
$13499
current price $134.99SEAFLO In-Line or 90 Quick Disconnect Check Valve Anti-Backflow, PA6+GF+POM Construction Non-Return Valve for Marine, RV, and Plumbing Use (Choose Size & Style)
Road & Home 1/2 in. Backflow Preventer, Brass $6.75
$675
current price $6.75Road & Home 1/2 in. Backflow Preventer, Brass
15 out of 5 Stars. 1 reviews
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12" Frost-Proof Hose Bibb with Push Connector Backflow Preventer 1/2" Connector $29.96
$2996
current price $29.9612" Frost-Proof Hose Bibb with Push Connector Backflow Preventer 1/2" Connector
63190 Backflow Preventer 1/2", Single, No Color $78.99
$7899
current price $78.9963190 Backflow Preventer 1/2", Single, No Color
Vertical Check Valves Brass Construction Easy Installation Backflow Prevention Was $14.59
Vertical Check Valves Brass Construction Easy Installation Backflow Prevention
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