Backflow Preventers from Plumbing World

Backflow Preventers

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Vacuum breakers and other backflow prevention systems are designed to stop gray/dirty water from potentially siphoning back into the water supply and contaminating the fresh water.

Double Check Valve Backflow Preventer
007-QT
click here for detailed dimensions
Model 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"
#007-QT bronze body
w/ ball valves $126.35 $134.99 $148.18 $286.15 $289.97 $315.90

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Reduced Pressure Zone Backflow Preventer
009QT
click here for detailed dimensions
Model 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"
#009-QT bronze body
w/ ball valves $173.43 $212.05 $225.94 $370.70 $403.13 $459.13

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Pressure Vacuum Breaker
Image/Model Description Size Price & Quantity

#800M4QT w/ ball valves Anti-syphon pressure vacuum breaker
Bronze body

Silicon rubber check valve disc

Plastic check valve seat

Stainless steel springs

Lightweight plastic disc float

Click here for detailed dimensions
1/2" $109.73
3/4" $116.36
1" $126.11
1-1/4" $281.42
1-1/2" $313.57
2" $354.59

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need any pipe thread sealing tape?

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Double Check Backflow Preventer
Image/Model Description Size Price & Quantity
007
#007
click here for detailed dimensions Iron body with NRS resilient seated valves 2-1/2" $1195.55
3" $1196.33
Iron body with OSY resilient seated valves 2-1/2" $1323.28
3" $1510.24

Image/Model Description Size Price & Quantity
709
#709
click here for detailed dimensions Iron body with OSY resilient seated valves 4" $1923.59
6" $2903.01
8" $5678.77
10" $7532.78
Iron body with NRS resilient seated valves 4" $1717.73
6" $2699.10
8" $7219.64
10" $7722.92

Image/Model Description Size Price & Quantity
Backflow preventer 774
#774
click here for detailed dimensions Stainless steel body with OSY resilient seated valves 2-1/2" $1218.82
3" $1380.76
4" $1596.48
6" $2650.41
8" $4743.82
10" $5974.91
Stainless steel body with NRS resilient seated valves 2-1/2" $1638.39
3" $1115.53
4" $1638.39
6" $2570.66
8" $4629.62
10" $5689.81

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Reduced Pressure Zone Backflow Preventer
Image/Model Description Size Price & Quantity
009
#009
click here for detailed dimensions Iron body with NRS resilient seated valves 2-1/2" $1294.38
3" $1364.48
Iron body with OSY resilient seated valves 2-1/2" $1384.40
3" $1530.99

Image/Model Description Size Price & Quantity
909
#909
click here for detailed dimensions Iron body with OSY resilient seated valves 2-1/2" $1747.41
3" $2033.98
4" $2147.64
6" $3824.74
8" $6709.40
10" $9090.33
Iron body with NRS resilient seated valves 2-1/2" $2049.42
3" $1850.15
4" $2049.42
6" $3359.52
8" $6253.36
10" $8418.29

Image/Model Description Size Price & Quantity
994
#994
click here for detailed dimensions Stainless steel body with NRS resilient seated valves 4" $1871.04
6" $3035.22
Stainless steel body with OSY resilient seated valves 4" $2063.61
6" $3941.88

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Double Check Detector Assembly Backflow Preventer
Image/Model Description Size Price & Quantity
007
#007 DCDA
click here for detailed dimensions Iron body with OSY resilient seated valves 2-1/2" $1602.47
3" $1733.89

Image/Model Description Size Price & Quantity
709
#709 DCDA
click here for detailed dimensions Iron body with OSY resilient seated valves 3" $2028.35
4" $2351.71
6" $3246.64
8" $5800.64
10" $8268.11

Image/Model Description Size Price & Quantity
774
#774 DCDA
click here for detailed dimensions Stainless steel body with OSY resilient seated valves 2-1/2" $1634.65
3" $1782.84
4" $2222.92
6" $3244.21
8" $5620.75
10" $6973.04

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Reduced Pressure Detector Assembly Backflow Preventer
Image/Model Description Size Price & Quantity
909
#909 RPDA
click here for detailed dimensions Iron body with OSY resilient seated valves 2-1/2" $2149.08
3" $2430.55
4" $2611.78
6" $4304.10
8" $7587.48
10" $9663.37

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Woodford Double Check Backflow Preventers

# 50H Backflow Preventer Feature:

Prevents backflow contamination and freezing by automatically draining when hose is removed

120°F maximum temperature rating

Maximum pressure 125 p.s.i.

3/4" male hose outlet connection

Available in brass and chrome finishes

Click Image Description Price & Quantity
Chrome Finish Price & Quantity
Brass Finish

# 50H - 3/4" female hose inlet connection
- 3/4" male hose outlet connection
- Fits Woodford faucets with standard 3/4" hose threaded outlets $24.83 $20.50

# 50HA - 1-1/8" special thread inlet connection
- 3/4" male hose outlet connection
- Fits Woodford faucet: 27 $24.94 $20.46

# 50HF - 13/16" special thread inlet connection
- 3/4" male hose outlet connection
- Fits Woodford faucets: 26, B26, Y26, Y2, and H34 $24.79 $20.44

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PTFE Thread sealing tape:

1/2" x 260" = $0.38

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Brass Vacuum Breaker

Click here for larger image
Brass vacuum breaker for hose bibbs = $3.49

Order 12 or more brass vacuum breaker hose bibbs for additional savings.
Order 100 or more brass vacuum breaker hose bibbs for even greater savings.
volume discounts will show up in your shopping cart

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to standard check valves

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Double Check Valve Backflow Preventer
click here for detailed dimensions
Model	1/2"	3/4"	1"	1-1/4"	1-1/2"	2"
#007-QT bronze body w/ ball valves	$126.35	$134.99	$148.18	$286.15	$289.97	$315.90

Pressure Vacuum Breaker
Image/Model	Description	Size	Price & Quantity
#800M4QT w/ ball valves	Anti-syphon pressure vacuum breaker Bronze body Silicon rubber check valve disc Plastic check valve seat Stainless steel springs Lightweight plastic disc float Click here for detailed dimensions	1/2"	$109.73
		3/4"	$116.36
		1"	$126.11
		1-1/4"	$281.42
		1-1/2"	$313.57
		2"	$354.59

Double Check Backflow Preventer
Image/Model	Description	Size	Price & Quantity
#007 click here for detailed dimensions	Iron body with NRS resilient seated valves	2-1/2"	$1195.55
	Iron body with NRS resilient seated valves	3"	$1196.33
	Iron body with OSY resilient seated valves	2-1/2"	$1323.28
	Iron body with OSY resilient seated valves	3"	$1510.24

Woodford Double Check Backflow Preventers
# 50H	Backflow Preventer Feature: Prevents backflow contamination and freezing by automatically draining when hose is removed 120°F maximum temperature rating Maximum pressure 125 p.s.i. 3/4" male hose outlet connection Available in brass and chrome finishes

Click Image	Description	Price & Quantity Chrome Finish	Price & Quantity Brass Finish
# 50H	- 3/4" female hose inlet connection - 3/4" male hose outlet connection - Fits Woodford faucets with standard 3/4" hose threaded outlets	$24.83	$20.50
# 50HA	- 1-1/8" special thread inlet connection - 3/4" male hose outlet connection - Fits Woodford faucet: 27	$24.94	$20.46
# 50HF	- 13/16" special thread inlet connection - 3/4" male hose outlet connection - Fits Woodford faucets: 26, B26, Y26, Y2, and H34	$24.79	$20.44