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Flujos de regreso

Protect your potable water—and comply with code—by selecting the right back-flow prevention devices for your irrigation system. Our Back Flow Preventers & Parts collection offers trusted assemblies and accessories built for homeowners, DIYers, and pros alike.

Whether you’re installing a new lawn sprinkler system or upgrading an existing irrigation setup, a proper back-flow preventer is a critical safeguard. These devices stop the reversal of water flow—known as back-siphonage or back-pressure—which can draw fertilizers, soil bacteria, and other contaminants into your drinking water supply.

Shop by type

  • PVB (Pressure Vacuum Breaker): common for lawn irrigation; must be installed above grade and typically 12" above highest downstream outlet.
  • RPZ / RP (Reduced Pressure Zone): highest protection for high-hazard or fertilizer/chem injection; requires drain/relief discharge area.
  • DC / DCVA (Double Check Valve Assembly): used where allowed for low-hazard irrigation without chemicals.
  • AVB (Atmospheric Vacuum Breaker): zone-level protection; not for continuous pressure (typically one per zone where permitted).

What you'll find

  • Sizes: 3/4", 1", 1-1/2", 2" (select larger commercial sizes available)
  • Options & parts: union ball valves, test cocks, lead-free models, repair kits (bonnets, checks, relief assemblies), freeze covers
  • Brands: Febco, Watts Water, Apollo, Zurn (Wilkins)

Why choose Big Frog Supply? We focus on irrigation, plumbing and landscape lighting supplies—so you’re not just buying a part, you’re tapping into expert-curated gear, reliable inventory, and a partner who speaks “sprinkler system” language.

  • Agotado

    Preventor de reflujo de presión reducida FIP de bronce Apollo de 3/4 pulg. con válvulas de cierre de unión

    Apollo
    $ 323.85 - $ 323.85
    $ 323.85
    $ 323.85 - $ 323.85
    $ 323.85

    Este artículo con conexiones roscadas está diseñado para evitar que el contraflujo de agua contaminada entre en el suministro de agua potable debid...

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    $ 323.85 - $ 323.85
    $ 323.85
    $ 323.85 - $ 323.85
    $ 323.85
    Agotado
  • Agotado

    Preventor de contraflujo Apollo, presión reducida, bronce con válvulas de bola y llaves de prueba SAE

    Apollo
    $ 274.00 - $ 327.14
    $ 274.00 - $ 327.14
    $ 274.00 - $ 327.14
    $ 274.00

    Este interruptor de vacío evita la contaminación del agua potable debido al retrosifón. Una válvula de alivio de protección contra congelamiento in...

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    $ 274.00 - $ 327.14
    $ 274.00 - $ 327.14
    $ 274.00 - $ 327.14
    $ 274.00
    Agotado

  • Conjunto de zona de presión reducida Febco 1" 860

    Febco
    $ 206.18 - $ 206.18
    $ 206.18
    $ 593.68
    $ 593.68 - $ 593.68
    $ 593.68

    Hoja de especificaciones Mantenimiento para la prevención de congelación Los conjuntos de zona de presión reducida FEBCO Serie 860 se utiliz...

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    $ 206.18 - $ 206.18
    $ 206.18
    $ 593.68
    $ 593.68 - $ 593.68
    $ 593.68

  • Watts - Válvula reductora de presión de agua LF25AUB-Z3 Tamaño de tubería de 1 pulgada

    Watts Water Technologies
    $ 429.97 - $ 429.97
    $ 429.97
    $ 429.97 - $ 429.97
    $ 429.97

    Hoja de especificaciones Las válvulas reductoras de presión generalmente se instalan frente a las tuberías para ayudar a mantener la presión en t...

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    $ 429.97 - $ 429.97
    $ 429.97
    $ 429.97 - $ 429.97
    $ 429.97
  • Agotado

    Watts 1-LF009M2-QT Sistema de reflujo de baja presión, 1" FIP

    Watts Water Technologies
    $ 713.36 - $ 713.36
    $ 713.36
    $ 713.36 - $ 713.36
    $ 713.36

    Este conjunto de zona de presión reducida sin plomo de 1 pulgada está diseñado para evitar que el reflujo de agua contaminada ingrese al suminis...

    Ver todos los detalles
    $ 713.36 - $ 713.36
    $ 713.36
    $ 713.36 - $ 713.36
    $ 713.36
    Agotado

  • Watts 2-LF009M2-QT Sistema de reflujo de baja presión, 2" FIP

    Watts Water Technologies
    $ 1,111.71 - $ 1,111.71
    $ 1,111.71
    $ 1,111.71 - $ 1,111.71
    $ 1,111.71

    Este conjunto de zona de presión reducida de 2 pulgadas está diseñado para evitar que el flujo de agua contaminada ingrese al sumini...

    Ver todos los detalles
    $ 1,111.71 - $ 1,111.71
    $ 1,111.71
    $ 1,111.71 - $ 1,111.71
    $ 1,111.71

  • Watts 1.5-LF009M2-QT Sistema de reflujo de baja presión, 1 1/2" FIP

    Watts Water Technologies
    $ 1,171.76 - $ 1,171.76
    $ 1,171.76
    $ 1,171.76 - $ 1,171.76
    $ 1,171.76

    Este conjunto de zona de presión reducida de 1 1/2 pulgadas está diseñado para evitar que el flujo de agua contaminada ingrese al su...

    Ver todos los detalles
    $ 1,171.76 - $ 1,171.76
    $ 1,171.76
    $ 1,171.76 - $ 1,171.76
    $ 1,171.76

  • Watts 0125572 Válvula reductora de presión LF25AUB-Z3 de 3/4" (prensa) sin plomo

    Watts Water Technologies
    $ 223.36 - $ 223.36
    $ 223.36
    $ 223.36 - $ 223.36
    $ 223.36

    Instalación de especificaciones Presión máxima de trabajo: 300 psi (21 bar) Rango de presión reducida ajustable: 25 a 75 psi (172 a 517 kP...

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    $ 223.36 - $ 223.36
    $ 223.36
    $ 223.36 - $ 223.36
    $ 223.36
  • Agotado

    Sistema de contraflujo Watts de baja presión, 3/4" FIP

    Watts Water Technologies
    $ 483.32 - $ 483.32
    $ 483.32
    $ 483.32 - $ 483.32
    $ 483.32

    Este conjunto de zona de presión reducida de 3/4 de pulgada está diseñado para evitar que el flujo de agua contaminada ingrese al suministro...

    Ver todos los detalles
    $ 483.32 - $ 483.32
    $ 483.32
    $ 483.32 - $ 483.32
    $ 483.32
    Agotado

  • Watts LF007M1-QT 1 válvula de retención doble de 1 pulgada

    Watts Water Technologies
    $ 455.99 - $ 455.99
    $ 455.99
    $ 455.99 - $ 455.99
    $ 455.99

    Este conjunto de prevención de reflujo de válvula de retención doble sin plomo de 1 pulgada está diseñado para evitar que el reflujo de agua contam...

    Ver todos los detalles
    $ 455.99 - $ 455.99
    $ 455.99
    $ 455.99 - $ 455.99
    $ 455.99

  • Febco 1" RPZ Principal Assembly (Top Access) 1" 860-QT-FS RP F1313

    Febco
    $ 525.99 - $ 525.99
    $ 525.99
    $ 525.99
    $ 525.99 - $ 525.99
    $ 525.99

    This 1 inch reduced pressure zone backflow preventer assembly prevents the reverse flow of high hazard (toxic) fluids found in the water from ente...

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    $ 525.99 - $ 525.99
    $ 525.99
    $ 525.99
    $ 525.99 - $ 525.99
    $ 525.99

  • Febco -F1314 - 1 1/4 IN Bronze Reduced Pressure Zone Backflow Preventer Assembly with Quarter Turn Shutoff, Small Diameter & Flood Sensor 860-QT-RP-FS

    Febco
    $ 0.00 - $ 0.00
    $ 0.00
    $ 885.90
    $ 885.90 - $ 885.90
    $ 885.90

    This 1 1/4 inch reduced pressure zone backflow preventer assembly prevents the reverse flow of high hazard (toxic) fluids found in the water from e...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 885.90
    $ 885.90 - $ 885.90
    $ 885.90

  • Febco - 860-QT-FS 2 - 2 IN Bronze Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, Backflow Flood Sensor F1316

    Febco
    $ 1.00 - $ 1.00
    $ 1.00
    $ 1,391.24
    $ 1,391.24 - $ 1,391.24
    $ 1,391.24

    2 IN Bronze Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, Backflow Flood Sensor  This item does not comp...

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    $ 1.00 - $ 1.00
    $ 1.00
    $ 1,391.24
    $ 1,391.24 - $ 1,391.24
    $ 1,391.24

  • Febco - 860U-QT-FS 3/4 - 3/4 IN Bronze Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Union Ball Valves, Small Diameter, Backflow Flood Sensor

    Febco
    $ 0.00 - $ 0.00
    $ 0.00
    $ 464.97
    $ 464.97 - $ 464.97
    $ 464.97

    3/4 IN Bronze Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Union Ball Valves, Small Diameter, Backflow Flood Sensor Thi...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 464.97
    $ 464.97 - $ 464.97
    $ 464.97

  • Zurn Wilkins 1-975XL 1" 975XL Reduced Pressure Principle Assembly

    Zurn Wilkins
    $ 777.99 - $ 777.99
    $ 777.99
    $ 777.99 - $ 777.99
    $ 777.99

    The 975XL Reduced Pressure Principle Backflow Assembly is used on non-potable water applications for high health hazard protection from both backsi...

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    $ 777.99 - $ 777.99
    $ 777.99
    $ 777.99 - $ 777.99
    $ 777.99

  • Zurn Wilkins 1-975XLS 1" 975XL Reduced Pressure Assembly w/ Bronze Wye Strainer (Discontinued)

    Zurn Wilkins
    $ 902.99 - $ 902.99
    $ 902.99
    $ 902.99 - $ 902.99
    $ 902.99

    The Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for non-potable water applications. The wye p...

    Ver todos los detalles
    $ 902.99 - $ 902.99
    $ 902.99
    $ 902.99 - $ 902.99
    $ 902.99

  • Zurn 1-975XL3 1" Reduced Pressure Principle Backflow Preventer

    Zurn Wilkins
    $ 0.00 - $ 0.00
    $ 0.00
    $ 936.99
    $ 936.99 - $ 936.99
    $ 936.99

    The Zurn Wilkins 975XL3 Reduced Pressure Principle Backflow Assembly provides high hazard protection against backsiphonage and backpressure in pota...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 936.99
    $ 936.99 - $ 936.99
    $ 936.99

  • Zurn Wilkins 34-975XL 3/4" Reduced Pressure Principle Backflow Preventor

    Zurn Wilkins
    $ 732.99 - $ 732.99
    $ 732.99
    $ 732.99 - $ 732.99
    $ 732.99

    The Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for non-potable water applications. The wye p...

    Ver todos los detalles
    $ 732.99 - $ 732.99
    $ 732.99
    $ 732.99 - $ 732.99
    $ 732.99

  • Zurn Wilkins 34-975XL2 3/4" 975XL2 Reduced Pressure Principle Assembly (Lead Free)

    Zurn Wilkins
    $ 1,025.99 - $ 1,025.99
    $ 1,025.99
    $ 1,025.99 - $ 1,025.99
    $ 1,025.99

    Spec Sheet   Install Manual The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable wa...

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    $ 1,025.99 - $ 1,025.99
    $ 1,025.99
    $ 1,025.99 - $ 1,025.99
    $ 1,025.99

  • Zurn 1" 375 RP Ball Vlv NPT Top Access Lead Free Red Pressure Principle Backflow Preventer

    Zurn Wilkins
    $ 0.00 - $ 0.00
    $ 0.00
    $ 936.99
    $ 936.99 - $ 936.99
    $ 936.99

    The Zurn Wilkins 375XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The EZSwap Pr...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 936.99
    $ 936.99 - $ 936.99
    $ 936.99

  • Zurn 1-975XL2 1" Reduced Pressure Principle Backflow Preventer No Lead

    Zurn Wilkins
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,084.99
    $ 1,084.99 - $ 1,084.99
    $ 1,084.99

    The 975XL2 Reduced Pressure Principle Assembly is used in high health hazard, potable water applications for protection from both backsiphonage and...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,084.99
    $ 1,084.99 - $ 1,084.99
    $ 1,084.99

  • Zurn Wilkins 34-375XL 3/4" 375 Reduced Pressure Principle Backflow Preventer

    Zurn Wilkins
    $ 0.00 - $ 0.00
    $ 0.00
    $ 884.99
    $ 884.99 - $ 884.99
    $ 884.99

    375 Reduced Pressure Principle Backflow Assembly Spec Sheet The 375 Reduced Pressure Principle Backflow Assembly is utilized where a potential hig...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 884.99
    $ 884.99 - $ 884.99
    $ 884.99

  • Zurn 1/2" 975 Reduced Pressure Principle Backflow Preventer Lead Free

    Zurn Wilkins
    $ 0.00 - $ 0.00
    $ 0.00
    $ 981.99
    $ 981.99 - $ 981.99
    $ 981.99

    The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The wye patte...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 981.99
    $ 981.99 - $ 981.99
    $ 981.99

  • Zurn Wilkins 4-375AST 4" 375 Reduced Pressure Principle Backflow Preventer with Stainless Steel Body

    Zurn Wilkins
    $ 0.00 - $ 0.00
    $ 0.00
    $ 6,401.99
    $ 6,401.99 - $ 6,401.99
    $ 6,401.99

    375 Reduced Pressure Principle Backflow Assembly Spec Sheet The 375 Reduced Pressure Principle Backflow Assembly is utilized where a potential hig...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 6,401.99
    $ 6,401.99 - $ 6,401.99
    $ 6,401.99

Before installing, check your local water-utility or code requirements—many jurisdictions mandate annual testing or specific assembly types based on flow, hazard level or chemical injection. Choose the correct device, install it properly (above grade or per elevation specs), and test or maintain it regularly to ensure protection long-term.

Browse through the collection to find the right size, type and brand for your project—then install with confidence knowing your potable supply is locked down.

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