FaucetsAir ToolsBathroom Cabinets & FixturesBathroom HardwareBathroom PlumbingElectrical ToolsGarbage DisposalsGroheGuttering & DrainageHand ToolsHVAC Ducting and VentilationKitchen PlumbingMechanics ToolsOutletsPipes, Fittings & AccessoriesPlumbing Tools & AccessoriesPro ToolsRoofingShop Plumbing by FixtureTestersValves & Valve RepairWater Filtration & Water SoftenersWater HeatersWater Heaters, Pumps & TanksWeatherproof CoversWelding & Cutting Accessories
Sort by|
FaucetsAir ToolsBathroom Cabinets & FixturesBathroom HardwareBathroom PlumbingElectrical ToolsGarbage DisposalsGroheGuttering & DrainageHand ToolsHVAC Ducting and VentilationKitchen PlumbingMechanics ToolsOutletsPipes, Fittings & AccessoriesPlumbing Tools & AccessoriesPro ToolsRoofingShop Plumbing by FixtureTestersValves & Valve RepairWater Filtration & Water SoftenersWater HeatersWater Heaters, Pumps & TanksWeatherproof CoversWelding & Cutting Accessories
Backflow Prevent(474)
Uses item details. Price when purchased online
Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes $16.00

Sponsored
$1600
current price $16.00Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes
44.8 out of 5 Stars. 4 reviews
Save with
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 $30.99

Sponsored
$3099
current price $30.99VEVOR 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
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
94.9 out of 5 Stars. 9 reviews
Save with
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
Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker 2 Pack From $10.74
From$1074
Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker 2 Pack
174.3 out of 5 Stars. 17 reviews
Clearance Backflow Preventer Valve for Shower & Floor Drains | One-Way Sewer Drain Valve | Prevents Water Backflow & Odors | Metal + PC Construction | 1-Piece Set From $4.17
From$417
Backflow Preventer Valve for Shower & Floor Drains | One-Way Sewer Drain Valve | Prevents Water Backflow & Odors | Metal + PC Construction | 1-Piece Set
Clearance Anti-odor Floor Drain Backflow Preventer Shower Waste Water Drainer Insert Drain Plug Sewer From $7.76

2 options
Available in additional 2 optionsFrom$776
Anti-odor Floor Drain Backflow Preventer Shower Waste Water Drainer Insert Drain Plug Sewer
Watts Backflow Prevent System, 3/4 In. Fip, Lead Free Was $403.89

Watts Backflow Prevent System, 3/4 In. Fip, Lead Free
15 out of 5 Stars. 1 reviews
Floor Drain Backflow Preventer Valve, Anti-Odor Plug for Shower, Kitchen, and Bathroom Drainage, Easy to Install, Universal Sewer Core Insert From $7.28
From$728
Floor Drain Backflow Preventer Valve, Anti-Odor Plug for Shower, Kitchen, and Bathroom Drainage, Easy to Install, Universal Sewer Core Insert
1/2 NPT. Backflow Preventer And Boiler Fill Valve $146.41 Was $163.69

Now$14641
current price Now $146.41, Was $163.69$163.69
1/2 NPT. Backflow Preventer And Boiler Fill Valve
VEVOR Downspout Gutter Elbow, fits 3x4 Inch Style A L-Shaped, Interface Size 3.1x4.3 in / 78x108 mm, Aluminum Alloy 90 Degree Gutter Elbow, for Residential, Commercial Building, Industrial Warehouse $13.99

Sponsored
$1399
current price $13.99VEVOR Downspout Gutter Elbow, fits 3x4 Inch Style A L-Shaped, Interface Size 3.1x4.3 in / 78x108 mm, Aluminum Alloy 90 Degree Gutter Elbow, for Residential, Commercial Building, Industrial Warehouse
DANSPEED 2" inch Stainless Steel Vertical Check Valve NPT Spring Loaded In-line From $12.49

Sponsored
From$1249
DANSPEED 2" inch Stainless Steel Vertical Check Valve NPT Spring Loaded In-line
25 out of 5 Stars. 2 reviews
ARROWHEAD BRASS & PLUMBING 58ABP Backflow Preventer, Non Anti-Siphon, 3/4 In. Hose Thread $14.72

$1472
current price $14.72ARROWHEAD BRASS & PLUMBING 58ABP Backflow Preventer, Non Anti-Siphon, 3/4 In. Hose Thread
Road & Home 1/2 in. Backflow Preventer, Brass $6.75

$675
current price $6.75Road & Home 1/2 in. Backflow Preventer, Brass
Save with
Watts Reduced Pressure Zone Backflow Preventer 1/2 SS009M3QT $2,933.75

$2,93375
current price $2,933.75Watts Reduced Pressure Zone Backflow Preventer 1/2 SS009M3QT
3/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff with Freeze Sensor $249.77

$24977
current price $249.773/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff with Freeze Sensor
Shower Floor Drain Backflow Preventer, One-Way Drain Valve, Sewer Core, Prevents Odors Insects Backflow, Easy to Install, Suitable for Kitchen Bathroom Garage Basement From $5.76
From$576
Shower Floor Drain Backflow Preventer, One-Way Drain Valve, Sewer Core, Prevents Odors Insects Backflow, Easy to Install, Suitable for Kitchen Bathroom Garage Basement
Guardian Equipment Backflow Preventer,Brass L108 $129.46

$12946
current price $129.46Guardian Equipment Backflow Preventer,Brass L108
58ABP .75 in. Backflow Preventer $14.88 Was $25.30

Now$1488
current price Now $14.88, Was $25.30$25.30
58ABP .75 in. Backflow Preventer
13 out of 5 Stars. 1 reviews
hydro flow backflow preventor 3/4 in fht x 3/4 in mht - display box (25/box) $8.99

$899
current price $8.99hydro flow backflow preventor 3/4 in fht x 3/4 in mht - display box (25/box)
VEVOR 12-Inch Frost-Free Sillcock, 1/2" PTC x 3/4" MHT Hose Bibb, Anti-Siphon Lead-Free Brass Valve, Push-to-Connect Brass Plumbing Fitting, Compatible with PEX, Copper, CPVC Pipes $31.99

Sponsored
$3199
current price $31.99VEVOR 12-Inch Frost-Free Sillcock, 1/2" PTC x 3/4" MHT Hose Bibb, Anti-Siphon Lead-Free Brass Valve, Push-to-Connect Brass Plumbing Fitting, Compatible with PEX, Copper, CPVC Pipes
15 out of 5 Stars. 1 reviews
findmall 7 Spool Hydraulic Directional Control Valve 11gpm,40L,2 Joystick,BSPP Interface $109.99

Sponsored
$10999
current price $109.99findmall 7 Spool Hydraulic Directional Control Valve 11gpm,40L,2 Joystick,BSPP Interface
Apollo Valves Reduced Pressure Zone Backflow Preventer 4ALF206T2F $960.43 Was $1,033.42

Now$96043
current price Now $960.43, Was $1,033.42$1,033.42
Apollo Valves Reduced Pressure Zone Backflow Preventer 4ALF206T2F
10Pcs Backflow Preventer Drain! Yrmaups Backflow Preventer Drain Valves, Magnetic One-Way Sewer Core, Metal Shower Floor Drains For Bathroom and Basement Water Drainage, Anti-Odor Backflow Preventer From $19.99
From$1999
10Pcs Backflow Preventer Drain! Yrmaups Backflow Preventer Drain Valves, Magnetic One-Way Sewer Core, Metal Shower Floor Drains For Bathroom and Basement Water Drainage, Anti-Odor Backflow Preventer
Clearance Backflow Preventer Cover Insulated Faucet Cover Outdoor Pressure Vacuum Cover Winter Water Well Pump Covers Protects from Snow Sun $8.99 Was $10.00

Now$899
current price Now $8.99, Was $10.00$10.00
Backflow Preventer Cover Insulated Faucet Cover Outdoor Pressure Vacuum Cover Winter Water Well Pump Covers Protects from Snow Sun
54.8 out of 5 Stars. 5 reviews
Save with
Reduced price WeiLaiKeQi PVC Drainage Pipe Floor Drain Backflow Preventer Valve for Plumbing Fixtures M From $11.99

4 options
Available in additional 4 optionsFrom$1199
WeiLaiKeQi PVC Drainage Pipe Floor Drain Backflow Preventer Valve for Plumbing Fixtures M
Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes $16.00

$1600
current price $16.00Merrill mfg BVBADNL75 Brass Vacuum Breaker Valve, 3/4 inch, Backflow Preventor for Drain Pipes
44.8 out of 5 Stars. 4 reviews
Save with
Yrmaups Drain Backflow Preventer, Shower Floor Drain One Way Core, Sewer Core Non Return Core, Anti Odor Insect Backflow Stopper, Sewer Check Core From $6.99
From$699
Yrmaups Drain Backflow Preventer, Shower Floor Drain One Way Core, Sewer Core Non Return Core, Anti Odor Insect Backflow Stopper, Sewer Check Core
yaaqii PVC Check Valve Backflow Prevention Valve Backflow Water Valve Prevent Backflow From $16.73

2 options
Available in additional 2 optionsFrom$1673
yaaqii PVC Check Valve Backflow Prevention Valve Backflow Water Valve Prevent Backflow
Watts 0061888 3/4 in. FIPS Backflow Preventer Brass

Watts 0061888 3/4 in. FIPS Backflow Preventer Brass
Dreamhall Pvc Check Valve Backflow Prevention Valve Backflow Water Valve Prevent Backflow,B

2 options
Available in additional 2 optionsDreamhall Pvc Check Valve Backflow Prevention Valve Backflow Water Valve Prevent Backflow,B
Drain Backflow Preventer under $5! Yannianjz Drains Backflow Preventer, Shower Floor Drains One Way Regulator, Sewer Core for Floor Water Drainage, Transparent Black Gravity Closure

Drain Backflow Preventer under $5! Yannianjz Drains Backflow Preventer, Shower Floor Drains One Way Regulator, Sewer Core for Floor Water Drainage, Transparent Black Gravity Closure
Watts 0061663 Model SD-2 3/8 in. Stainless Steel FNPT 200 psi Backflow Preventer

Watts 0061663 Model SD-2 3/8 in. Stainless Steel FNPT 200 psi Backflow Preventer
Drains Backflow Preventer Shower Floor Drains Backflow Preventer One Way Drains Valves Sewer Core For Floor Water Drainage Black Free Size
Drains Backflow Preventer Shower Floor Drains Backflow Preventer One Way Drains Valves Sewer Core For Floor Water Drainage Black Free Size
Drains Backflow Preventer, One Way Drain Valve, Sewer Core, Metal+PC Material, Anti-Odor Anti-Insect, Easy to Install, for Floor Water Drainage in Bathroom Kitchen

Drains Backflow Preventer, One Way Drain Valve, Sewer Core, Metal+PC Material, Anti-Odor Anti-Insect, Easy to Install, for Floor Water Drainage in Bathroom Kitchen
1" 975XL Reduced Pressure Principle Backflow Preventer

1" 975XL Reduced Pressure Principle Backflow Preventer
55 out of 5 Stars. 5 reviews
Watts 1 in. D X 1 in. D FNPT x FNPT Brass Backflow Preventer Double Check Valve $284.95

$28495
current price $284.95Watts 1 in. D X 1 in. D FNPT x FNPT Brass Backflow Preventer Double Check Valve
Silicone Floor Drain Backflow Preventer One-Way Valve Shower Drain Core Odor And Insect Stopper For Bathroom Kitchen Sink
Silicone Floor Drain Backflow Preventer One-Way Valve Shower Drain Core Odor And Insect Stopper For Bathroom Kitchen Sink
Woodford 37HF-BR Backflow Preventer $90.79

$9079
current price $90.79Woodford 37HF-BR Backflow Preventer
Floor Drain Backflow Preventer, One Way Valve Sewer Core for Shower Floor Water Drainage, Odor Insect Prevention, ABS Material, Easy Installation, Practical Drain Accessory Was $6.84

Floor Drain Backflow Preventer, One Way Valve Sewer Core for Shower Floor Water Drainage, Odor Insect Prevention, ABS Material, Easy Installation, Practical Drain Accessory
Floor Drain Backflow Preventer One Way Core Odor Proof Water Drainage for Shower Bathroom Toilet Sewer Pipe Gift

Floor Drain Backflow Preventer One Way Core Odor Proof Water Drainage for Shower Bathroom Toilet Sewer Pipe Gift
Woodford 37HD2-BR Backflow Preventer $124.88

$12488
current price $124.88Woodford 37HD2-BR Backflow Preventer
Thickened Brass Not Return Fitting Easy Installation Backflow Preventer For Water Supply And HVAC Applications From $10.14
From$1014
Thickened Brass Not Return Fitting Easy Installation Backflow Preventer For Water Supply And HVAC Applications
Silicone Drain Backflow Preventer Core For Shower Floor Sewer One Way Valve Odor Insect Stopper 2X2X1Inch
Silicone Drain Backflow Preventer Core For Shower Floor Sewer One Way Valve Odor Insect Stopper 2X2X1Inch
Apollo Valves Backflow Preventer Repair Kit 40003A4 $18.73

$1873
current price $18.73Apollo Valves Backflow Preventer Repair Kit 40003A4
Groen 146392 Backflow Preventer $263.55

$26355
current price $263.55Groen 146392 Backflow Preventer
Apollo Valves Reduced Pressure Zone Backflow Preventer 4ALF205A2F $567.65 $567.65/1

$56765
current price $567.65$567.65/1
Apollo Valves Reduced Pressure Zone Backflow Preventer 4ALF205A2F
ABS One-Way Sewer Backflow Preventer Valve for Shower Floor Drains, Odor and Insect Blocking Core, Easy Install, Orange, 6.4x4.5x2.5cm, 1 Pack Was $5.91

ABS One-Way Sewer Backflow Preventer Valve for Shower Floor Drains, Odor and Insect Blocking Core, Easy Install, Orange, 6.4x4.5x2.5cm, 1 Pack
Other options to consider(25)
Popular in Backflow Prevent
Related Products
Larsen 03-4221 Lavatory/Kitchen Wall Drain J-Bend, White PVC - Quantity 6
Larsen 03-4221 Lavatory/Kitchen Wall Drain J-Bend, White PVC - Quantity 6$30.78current price $30.7850-160Mm Pvc Drainage Pipe Floor Drains Auto Closing Displacement Valve Cover
50-160Mm Pvc Drainage Pipe Floor Drains Auto Closing Displacement Valve Cover$9.22current price $9.2250-160mm PVC Drainage Pipe Floor Drains Auto Closing Displacement Valve Cover
50-160mm PVC Drainage Pipe Floor Drains Auto Closing Displacement Valve Cover$13.39current price $13.39Arkzeo 50-160mm PVC Drainage Pipe Floor Drains Auto Closing Displacement Valve Cover 50
Arkzeo 50-160mm PVC Drainage Pipe Floor Drains Auto Closing Displacement Valve Cover 50$6.39current price $6.39Proflo Pfpcvc300k 2" Pvc Compression Check Valve
Proflo Pfpcvc300k 2" Pvc Compression Check Valve$70.11current price $70.11Homewerks 1 in. D X 1 in. D FIP PVC Spring Loaded Check Valve
Homewerks 1 in. D X 1 in. D FIP PVC Spring Loaded Check Valve$13.26current price $13.26CV100MT Banjo 1" Male X 1" Female NPT Check Valve, Polypropylene
CV100MT Banjo 1" Male X 1" Female NPT Check Valve, Polypropylene$22.25current price $22.25Magic Plastics 2 in. D X 2 in. D Slip PVC Quiet Check Valve
Magic Plastics 2 in. D X 2 in. D Slip PVC Quiet Check Valve$37.83current price $37.83VBVP40E3B 0.5 in. PVC Schedule 40 Solvent Ball Valve - White
VBVP40E3B 0.5 in. PVC Schedule 40 Solvent Ball Valve - White$11.26current price $11.26Gf Piping Systems 1/2" Socket PVC Ball Valve Inline True Union 161375017
Gf Piping Systems 1/2" Socket PVC Ball Valve Inline True Union 161375017$44.35current price $44.351/4 Turn Press Straight Stop Valve, 1/2" Press x 3/8" OD Compression Miiflex Heavy Duty Chrome Plated Brass Quarter Shut Off Valve with Ferrule and Nut for Residential/Commercial [5 Pack]
1/4 Turn Press Straight Stop Valve, 1/2" Press x 3/8" OD Compression Miiflex Heavy Duty Chrome Plated Brass Quarter Shut Off Valve with Ferrule and Nut for Residential/Commercial [5 Pack]$54.99current price $54.99T&S Brass 016419-25 3/8-Inch Compression Check Valve Assembly
T&S Brass 016419-25 3/8-Inch Compression Check Valve Assembly$33.71current price $33.71Gf Piping Systems 3" Socket PVC Ball Valve Inline True Union 161375009
Gf Piping Systems 3" Socket PVC Ball Valve Inline True Union 161375009$438.88current price $438.88T&S Brass 016419-25 0.375 in. Female x Male Compression Check Valve Assembly, Chrome Plated Brass
T&S Brass 016419-25 0.375 in. Female x Male Compression Check Valve Assembly, Chrome Plated Brass$38.90current price $38.90Gf Piping Systems 1-1/2" Socket PVC Ball Valve Inline True Union 161375021
Gf Piping Systems 1-1/2" Socket PVC Ball Valve Inline True Union 161375021$99.77current price $99.77























