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.
-
Rompevacío de presión Apollo Bronze FIP
ApolloPrecio original $ 104.02 - Precio original $ 104.95Precio original$ 104.02 - $ 104.95$ 104.02 - $ 104.95Precio actual $ 104.02Este interruptor de vacío evita la contaminación del agua potable debido al retrosifón. Una válvula de alivio de protección contra congelamiento in...
Ver todos los detallesPrecio original $ 104.02 - Precio original $ 104.95Precio original$ 104.02 - $ 104.95$ 104.02 - $ 104.95Precio actual $ 104.02Agotado -
FEBCO 3/4 pulg. 765 Preventor de reflujo
FebcoPrecio original $ 116.62 - Precio original $ 116.62Precio original$ 116.62$ 116.62 - $ 116.62Precio actual $ 116.62Manual de instalación de la hoja de especificaciones Rompevacíos de presión Serie 765 Tamaño: 1/2" - 2" (15 mm - 50 mm) Los interruptore...
Ver todos los detallesPrecio original $ 116.62 - Precio original $ 116.62Precio original$ 116.62$ 116.62 - $ 116.62Precio actual $ 116.62Agotado -
Preventor de contraflujo Apollo, presión reducida, bronce con válvulas de bola y llaves de prueba SAE
ApolloPrecio original $ 274.00 - Precio original $ 327.14Precio original$ 274.00 - $ 327.14$ 274.00 - $ 327.14Precio actual $ 274.00Este interruptor de vacío evita la contaminación del agua potable debido al retrosifón. Una válvula de alivio de protección contra congelamiento in...
Ver todos los detallesPrecio original $ 274.00 - Precio original $ 327.14Precio original$ 274.00 - $ 327.14$ 274.00 - $ 327.14Precio actual $ 274.00Agotado -
Watts 0125572 Válvula reductora de presión LF25AUB-Z3 de 3/4" (prensa) sin plomo
Watts Water TechnologiesPrecio original $ 223.36 - Precio original $ 223.36Precio original$ 223.36$ 223.36 - $ 223.36Precio actual $ 223.36Instalación de especificaciones Presión máxima de trabajo: 300 psi (21 bar) Rango de presión reducida ajustable: 25 a 75 psi (172 a 517 kP...
Ver todos los detallesPrecio original $ 223.36 - Precio original $ 223.36Precio original$ 223.36$ 223.36 - $ 223.36Precio actual $ 223.36 -
Sistema de contraflujo Watts de baja presión, 3/4" FIP
Watts Water TechnologiesPrecio original $ 483.32 - Precio original $ 483.32Precio original$ 483.32$ 483.32 - $ 483.32Precio actual $ 483.32Este 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 detallesPrecio original $ 483.32 - Precio original $ 483.32Precio original$ 483.32$ 483.32 - $ 483.32Precio actual $ 483.32Agotado -
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
FebcoPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 464.97$ 464.97 - $ 464.97Precio actual $ 464.973/4 IN Bronze Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Union Ball Valves, Small Diameter, Backflow Flood Sensor Thi...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 464.97$ 464.97 - $ 464.97Precio actual $ 464.97 -
Zurn Wilkins 34-720A 3/4 Inch Pressure Vacuum Breaker Assembly
Zurn WilkinsPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 147.99$ 147.99 - $ 147.99Precio actual $ 147.99Our Pressure Vacuum Breaker protects against back siphonage in high health hazard, non-potable residential and commercial irrigation applications. ...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 147.99$ 147.99 - $ 147.99Precio actual $ 147.99 -
Zurn Wilkins 34-975XL 3/4" Reduced Pressure Principle Backflow Preventor
Zurn WilkinsPrecio original $ 732.99 - Precio original $ 732.99Precio original$ 732.99$ 732.99 - $ 732.99Precio actual $ 732.99The Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for non-potable water applications. The wye p...
Ver todos los detallesPrecio original $ 732.99 - Precio original $ 732.99Precio original$ 732.99$ 732.99 - $ 732.99Precio actual $ 732.99 -
Zurn Wilkins 34-975XL2 3/4" 975XL2 Reduced Pressure Principle Assembly (Lead Free)
Zurn WilkinsPrecio original $ 1,025.99 - Precio original $ 1,025.99Precio original$ 1,025.99$ 1,025.99 - $ 1,025.99Precio actual $ 1,025.99Spec Sheet Install Manual The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable wa...
Ver todos los detallesPrecio original $ 1,025.99 - Precio original $ 1,025.99Precio original$ 1,025.99$ 1,025.99 - $ 1,025.99Precio actual $ 1,025.99 -
Zurn Wilkins 34-375XL 3/4" 375 Reduced Pressure Principle Backflow Preventer
Zurn WilkinsPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 884.99$ 884.99 - $ 884.99Precio actual $ 884.99375 Reduced Pressure Principle Backflow Assembly Spec Sheet The 375 Reduced Pressure Principle Backflow Assembly is utilized where a potential hig...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 884.99$ 884.99 - $ 884.99Precio actual $ 884.99 -
Zurn Wilkins 34-70XLDUC 3/4" 70XL Pressure Reducing Valve with Double Union FNPT Connection and FC (Cop/ Sweat) Union Connection
Zurn WilkinsPrecio original $ 244.99 - Precio original $ 244.99Precio original$ 244.99$ 244.99 - $ 244.99Precio actual $ 244.99The 70XL Pressure Reducing Valve is a contractor favorite, providing a variety of residential and commercial customers with extreme stability, rugg...
Ver todos los detallesPrecio original $ 244.99 - Precio original $ 244.99Precio original$ 244.99$ 244.99 - $ 244.99Precio actual $ 244.99Agotado -
Zurn Wilkins 34-NR3XLDUPEX 3/4 in. NR3XL Pressure Reducing Valve, Double Union Male Barbed PEX Connections
Zurn WilkinsPrecio original $ 221.99 - Precio original $ 221.99Precio original$ 221.99$ 221.99 - $ 221.99Precio actual $ 221.99Our time-tested Pressure Reducing Valves are ideal for residential applications that require frequent cleaning of sediment and debris prevent build...
Ver todos los detallesPrecio original $ 221.99 - Precio original $ 221.99Precio original$ 221.99$ 221.99 - $ 221.99Precio actual $ 221.99Agotado -
Zurn Wilkins 34-350XL 3/4" 350XL Double Check Backflow Preventer
Zurn WilkinsPrecio original $ 427.99 - Precio original $ 427.99Precio original$ 427.99$ 427.99 - $ 427.99Precio actual $ 427.99The 350XL Double Check Valve Assembly is used in low health hazard, potable water applications for protection against both back siphonage and backp...
Ver todos los detallesPrecio original $ 427.99 - Precio original $ 427.99Precio original$ 427.99$ 427.99 - $ 427.99Precio actual $ 427.99Agotado -
Zurn Wilkins 34-NR3XLDU 3/4" Lead Free Water Pressure Reducing Valve w/ Integral By-Pass Check Valve
Zurn WilkinsPrecio original $ 221.99 - Precio original $ 221.99Precio original$ 221.99$ 221.99 - $ 221.99Precio actual $ 221.99Ideal for use where lead free valves are required. Designed for installation on potable water lines to reduce high inlet pressure to a lower outle...
Ver todos los detallesPrecio original $ 221.99 - Precio original $ 221.99Precio original$ 221.99$ 221.99 - $ 221.99Precio actual $ 221.99Agotado -
Zurn Wilkins 34-950XLT2 3/4" Wilkins 950XLT2 Double Check Valve Assembly (Lead Free)
Zurn WilkinsPrecio original $ 462.99 - Precio original $ 462.99Precio original$ 462.99$ 462.99 - $ 462.99Precio actual $ 462.99The Zurn Wilkins 950XLT2 Double Check Valve Assembly provides top access check covers. Suitable for below grade installation in standard valve box...
Ver todos los detallesPrecio original $ 462.99 - Precio original $ 462.99Precio original$ 462.99$ 462.99 - $ 462.99Precio actual $ 462.99Agotado -
Zurn Wilkins 34-600XL 600XL FNPT Union x FNPT Pressure Reducing Valve (Lead Free)
Zurn WilkinsPrecio original $ 318.99 - Precio original $ 318.99Precio original$ 318.99$ 318.99 - $ 318.99Precio actual $ 318.99Zurn Wilkins Model 34-600XL 3/4" Water Pressure Reducing Brass Valve with Integral By-pass Check Valve and Strainer, FNPT Union x FNPT, Lead Free ...
Ver todos los detallesPrecio original $ 318.99 - Precio original $ 318.99Precio original$ 318.99$ 318.99 - $ 318.99Precio actual $ 318.99Agotado -
Watts LF009M3-QT-S 3/4 3/4 IN Lead Free Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff Valves, Bronze Strainer (Discontinued)
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 579.00$ 579.00 - $ 579.00Precio actual $ 579.003/4 IN Lead Free Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff Valves, Bronze Strainer Lead Free: YES 0122695 This 3/4 i...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 579.00$ 579.00 - $ 579.00Precio actual $ 579.00 -
Watts LFN45BM1-U-S 3/4 3/4 IN Lead Free Water Pressure Reducing Valve, Solder Union x FPT, Adjust 25-75 psi, Max Work 400 psi 0009480
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 178.98$ 178.98 - $ 178.98Precio actual $ 178.983/4 IN Lead Free Water Pressure Reducing Valve, Solder Union x FPT, Adjust 25-75 psi, Max Work 400 psi 0009480 Lead Free: YES This 3/4 inch lead...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 178.98$ 178.98 - $ 178.98Precio actual $ 178.98 -
Watts - 3/4-LF860-QT RP - 3/4" RPZ Lead Free 860 Series Reduced Pressure Zone Assy #0683001
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 613.12$ 613.12 - $ 613.12Precio actual $ 613.12This 3/4 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of high hazard (toxic) fluids fo...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 613.12$ 613.12 - $ 613.12Precio actual $ 613.12 -
Watts - LF007M3-QT-FZ - 3/4 - 3/4 In Lead Free Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Single Top Entry 0063231
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 403.89$ 403.89 - $ 403.89Precio actual $ 403.89Series LF007 Double Check Valve assemblies are installed at referenced cross-connections to prevent the backflow of polluted water into the potable...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 403.89$ 403.89 - $ 403.89Precio actual $ 403.89 -
Watts LFN55BM1 U 3/4 3/4 IN Lead Free Water Pressure Reducing Valve, NPT Thread Union x NPT Female, Max Work 400 psi, Adjust 25-75 psi - 009589
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 170.93$ 170.93 - $ 170.93Precio actual $ 170.933/4 IN Lead Free Water Pressure Reducing Valve, NPT Thread Union x NPT Female, Max Work 400 psi, Adjust 25-75 psi 0009589 Lead Free: YES This 3/4 ...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 170.93$ 170.93 - $ 170.93Precio actual $ 170.93 -
Watts LFN45BM1-U 3/4 3/4 IN Lead Free Water Pressure Reducing Valve, NPT Union x FPT, Adjust 25-75 psi, Max Work 400 psi 0009478
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 171.53$ 171.53 - $ 171.53Precio actual $ 171.533/4 IN Lead Free Water Pressure Reducing Valve, NPT Union x FPT, Adjust 25-75 psi, Max Work 400 psi 0009478 Lead Free: YES This 3/4 inch lead fr...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 171.53$ 171.53 - $ 171.53Precio actual $ 171.53Agotado -
Febco Poppet Assembly Kit for 1/2", 3/4" 765 Pressure Vacuum Breaker
FebcoPrecio original $ 26.08 - Precio original $ 26.08Precio original $ 26.08$ 26.08$ 26.08 - $ 26.08Precio actual $ 26.08Febco: 1/2" - 3/4" - Poppet Assembly for a 765 Pressure Vacuum Breaker
Precio original $ 26.08 - Precio original $ 26.08Precio original $ 26.08$ 26.08$ 26.08 - $ 26.08Precio actual $ 26.08 -
Febco 3/4" RPZ Principal Assembly (Top Access) ¾” 860-QT-FS RP F1312 860-QT-FS 3/4
FebcoPrecio original $ 489.99 - Precio original $ 489.99Precio original $ 489.99$ 501.09$ 501.09 - $ 501.09Precio actual $ 501.09This 3/4 inch reduced pressure zone backflow preventer assembly prevents the reverse flow of high hazard (toxic) fluids found in the water from en...
Ver todos los detallesPrecio original $ 489.99 - Precio original $ 489.99Precio original $ 489.99$ 501.09$ 501.09 - $ 501.09Precio actual $ 501.09
Related Articles
Freeze Protecting Your Pressure Vacuum Breaker
Backflow prevention assemblies must be drained for the winter in areas where freezing temperatures may occur. If water inside the...
Secrets Every Sprinkler System Owner Must Know About Pressure Vacuum Breakers
This article will provide a detailed understanding of PVBs, their significance, and why you need one for your irrigation system.
The difference between a Pressure Vacuum Breaker and a Reduced Pressure Zone
When it comes to protecting a plumbing system from backflow, there are different types of devices that can be installed....