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Simple, straightforward and low shipping rates for these backflow preventers.


Anti-Siphon Vacuum Breakers & Back Flow Preventers


Keep your water supply safe by preventing contaminants or pollutants from entering into your potable water system with a dependable anti-siphon vacuum breaker or back flow preventer brought to you by PlumbingSupply.com.

Anti-Siphon Vacuum Breakers
Vacuum Breaker This Vacuum Breaker features:
  • These are typically used with service sink faucets
  • Prevents backflow contamination
  • Suitable for temperatures up to 180°F
  • Maximum pressure 125 p.s.i. (not for used with pressurized systems)
  • Available in three sizes

Description Price & Quantity
3/8" anti-siphon vacuum breaker - chrome $37.49
1/2" anti-siphon vacuum breaker - chrome $29.97
3/4" anti-siphon vacuum breaker - chrome $38.97

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Double Check Backflow Preventer For Hose Bibbs
Backflow Preventer
# 50H
This Backflow Preventer Features:
  • Prevents backflow contamination and freezing
  • 120°F maximum temperature rating
  • Maximum pressure 125 p.s.i.
  • 3/4" male hose outlet connection
  • Available in brass and chrome finishes

Description Price & Quantity
Chrome Finish
Price & Quantity
Brass Finish
- 3/4" female hose inlet connection
- 3/4" male hose outlet connection
- Fits hose bibbs with standard 3/4" hose thread outlets
$24.83 $20.50

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Atmospheric Vacuum Breakers by Fisher Mfg.
Backflow Preventer
# 3990
Atmospheric Vacuum Breaker Features:

Description Price & Quantity
Vacuum Breaker - 1/2" NPT Connections - Ledge Mount $207.09
Vacuum Breaker - 1/2" Slip Joint Connections - Deck Mount $199.90

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Anti-Spill Vacuum Breakers by Fisher Mfg.
Backflow Preventer
# 14443
Anti-Spill Vacuum Breaker Features:

Description Price & Quantity
Anti-Spill Vacuum Breaker - 1/2" NPT Connections - Rough Chrome Finish $227.26
Anti-Spill Vacuum Breaker - 3/4" NPT Connections - Satin Chrome Finish $400.06

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Wall Mount Anti-Spill Vacuum Breakers by Fisher Mfg.
Backflow Preventer
# 14540
Anti-Spill Vacuum Breaker Features:

Wall Mount Anti-Spill Vacuum Breaker - 1/2" NPT Connections = $423.10

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Inline Vacuum Breakers by Fisher Mfg.
Backflow Preventer
# 2955-8000
Vacuum Breaker Features:
  • Atmospheric vent
  • Designed for in-line applications
  • Double check design
  • 40°F Min to 140°F Max temperature rating
  • 200 PSI Max static pressure rating
  • Available in multiple sizes

Description Price & Quantity
3/8" NPT Female x 3/8" NPT Male In-Line Back Flow Preventer $66.65
1/4" NPT Female x 1/4" NPT Male In-Line Back Flow Preventer $98.19
3/4" NPT Female x 3/4" NPT Male In-Line Back Flow Preventer $109.27

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Hose Bibb Atmospheric Vacuum Breakers by Fisher Mfg.
Backflow Preventer
# 1700-8002
Vacuum Breaker Features:
  • Atmospheric vent
  • Designed for hose bibb applications
  • Vandal resistant
  • 40°F Min to 140°F Max temperature rating

Hose Bibb Atmospheric Vacuum Breaker = $29.86

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