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.
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Zurn Wilkins 114-600XL 1-1/4" 600XL Pressure Reducing Valve
Zurn WilkinsPrecio original $ 819.99 - Precio original $ 819.99Precio original$ 819.99$ 819.99 - $ 819.99Precio actual $ 819.99The 600XL Pressure Reducing Valve handles sandy, debris-laden water systems for high-flow capacity in residential, commercial, and new construction...
Ver todos los detallesPrecio original $ 819.99 - Precio original $ 819.99Precio original$ 819.99$ 819.99 - $ 819.99Precio actual $ 819.99Agotado -
Zurn Wilkins 112-720A 1-1/2" 720A Pressure Vacuum Breaker Assembly
Zurn WilkinsPrecio original $ 795.99 - Precio original $ 795.99Precio original$ 795.99$ 795.99 - $ 795.99Precio actual $ 795.99Our Pressure Vacuum Breaker protects against back siphonage in high health hazard, non-potable residential and commercial irrigation applications. ...
Ver todos los detallesPrecio original $ 795.99 - Precio original $ 795.99Precio original$ 795.99$ 795.99 - $ 795.99Precio actual $ 795.99Agotado -
Zurn Wilkins 114-NR3XL 1 1/4 in. NR3XL Pressure Reducing Valve, Single Union FNPT Connection
Zurn WilkinsPrecio original $ 627.99 - Precio original $ 627.99Precio original$ 627.99$ 627.99 - $ 627.99Precio actual $ 627.99Our 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 $ 627.99 - Precio original $ 627.99Precio original$ 627.99$ 627.99 - $ 627.99Precio actual $ 627.99Agotado -
Zurn Wilkins 112-NR3XLDUC 1-1/2" NR3XL Pressure Reducing Valve with Double Union FNPT Copper Sweat Connection
Zurn WilkinsPrecio original $ 1,043.99 - Precio original $ 1,043.99Precio original$ 1,043.99$ 1,043.99 - $ 1,043.99Precio actual $ 1,043.99Our 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 $ 1,043.99 - Precio original $ 1,043.99Precio original$ 1,043.99$ 1,043.99 - $ 1,043.99Precio actual $ 1,043.99Agotado -
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 1-70XLDU 1" Pressure Reducing Valve w/ FNPT Double Union Connections
Zurn WilkinsPrecio original $ 283.99 - Precio original $ 283.99Precio original$ 283.99$ 283.99 - $ 283.99Precio actual $ 283.99The model 70XL has been providing residential and commercial customers with ruggedness and ease of repair for over 40 years. Ideal for use where Le...
Ver todos los detallesPrecio original $ 283.99 - Precio original $ 283.99Precio original$ 283.99$ 283.99 - $ 283.99Precio actual $ 283.99Agotado -
Zurn Wilkins 112-975XL2S 1-1/2" Lead Free Wilkins 975XL2 Reduced Pressure Principle Assembly w/ Bronze "Y" Strainer
Zurn WilkinsPrecio original $ 2,153.99 - Precio original $ 2,153.99Precio original$ 2,153.99$ 2,153.99 - $ 2,153.99Precio actual $ 2,153.99The 975XL2 Reduced Pressure Principle Assembly is used in high health hazard, potable water applications for protection from both backsiphonage and...
Ver todos los detallesPrecio original $ 2,153.99 - Precio original $ 2,153.99Precio original$ 2,153.99$ 2,153.99 - $ 2,153.99Precio actual $ 2,153.99Agotado -
Zurn Wilkins 1-600XL 1" Lead Free FNPT Union x FNPT Pressure Reducing Valve
Zurn WilkinsPrecio original $ 459.99 - Precio original $ 459.99Precio original$ 459.99$ 459.99 - $ 459.99Precio actual $ 459.99Zurn Wilkins Model 34-600XL 1" Water Pressure Reducing Brass Valve with Integral By-pass Check Valve and Strainer, FNPT Union x FNPT, Lead Free ...
Ver todos los detallesPrecio original $ 459.99 - Precio original $ 459.99Precio original$ 459.99$ 459.99 - $ 459.99Precio actual $ 459.99Agotado -
Zurn Wilkins 1-NR3XL 1" NR3 Water Pressure Reducing Valve
Zurn WilkinsPrecio original $ 261.99 - Precio original $ 261.99Precio original$ 261.99$ 261.99 - $ 261.99Precio actual $ 261.99The NR3XL Pressure Reducing Valve provides reliable pressure reduction for residential applications, and is available with a variety of end connec...
Ver todos los detallesPrecio original $ 261.99 - Precio original $ 261.99Precio original$ 261.99$ 261.99 - $ 261.99Precio actual $ 261.99Agotado -
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 RK1-720A 1/2" - 2" Pressure Vacuum Breaker Repair Kit
Zurn WilkinsPrecio original $ 74.99 - Precio original $ 74.99Precio original$ 74.99$ 74.99 - $ 74.99Precio actual $ 74.99Complete repair kit for the 720A Pressure Vacuum Breaker. Kits fits the 1/2" - 2" models of the Wilkins 720A Includes poppet assembly, spider asse...
Ver todos los detallesPrecio original $ 74.99 - Precio original $ 74.99Precio original$ 74.99$ 74.99 - $ 74.99Precio actual $ 74.99Agotado -
Zurn Wilkins 114-720A 720A 1.25 inch PVB Backflow Preventer
Zurn WilkinsPrecio original $ 651.99 - Precio original $ 651.99Precio original$ 651.99$ 651.99 - $ 651.99Precio actual $ 651.99Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Assembly sh...
Ver todos los detallesPrecio original $ 651.99 - Precio original $ 651.99Precio original$ 651.99$ 651.99 - $ 651.99Precio actual $ 651.99Agotado -
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 -
Zurn Wilkins 721-20 Bonnet for 720A
Zurn WilkinsPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 37.18$ 37.18 - $ 37.18Precio actual $ 37.18Dimensions: 2" x 2" x 0.3" Weight: 1.6 oz
Precio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 37.18$ 37.18 - $ 37.18Precio actual $ 37.18Agotado -
Watts LFFPTC-F 1/8" - 1/8 In Lead Free Full Port Test Cock 781074LL
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 19.38$ 19.38 - $ 19.38Precio actual $ 19.381/8 In Lead Free Full Port Test Cock 781074LL This 1/8 IN lead free full port test cock is used for testing 1/2 to 1 inch lead free backflow pre...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 19.38$ 19.38 - $ 19.38Precio actual $ 19.38 -
Watts 0887709 KIT de flotador y ventilación de 1/2" y 3/4", PVB de reparación blanco
Watts Water TechnologiesPrecio original $ 12.39 - Precio original $ 12.39Precio original$ 12.39$ 12.39 - $ 12.39Precio actual $ 12.39El kit de reparación contiene: ventilación del flotador, conjunto de disco, sello y resorte y junta tórica del capó Para reparar la ventil...
Ver todos los detallesPrecio original $ 12.39 - Precio original $ 12.39Precio original$ 12.39$ 12.39 - $ 12.39Precio actual $ 12.39 -
Watts LFFPTC-F 1/4" - 1/4 In Lead Free Full Port Test Cock 781075LL
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 19.38$ 19.38 - $ 19.38Precio actual $ 19.38This 1/4 IN lead free full port test cock is used for testing 1 1/4 to 2 inch lead free backflow preventer, as an isolation valve for gauges or as...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 19.38$ 19.38 - $ 19.38Precio actual $ 19.38 -
Watts RK 009M2-CK2 1 1 IN Reduced Pressure Zone Assembly Backflow Repair Kit, Second Check Kit, for 009M2 0887790
Watts Water TechnologiesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 73.60$ 73.60 - $ 73.60Precio actual $ 73.60This 1 IN 009M2 second check repair kit provides all the parts necessary to replace the major internal components of the applicable reduced pressu...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 73.60$ 73.60 - $ 73.60Precio actual $ 73.60 -
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 Primer kit de verificación para RPZ de 1" 0887789
Watts Water TechnologiesPrecio original $ 80.75 - Precio original $ 80.75Precio original$ 80.75$ 80.75 - $ 80.75Precio actual $ 80.75PRIMERA COMPROBACIÓN DEL KIT DE REPARACIÓN DEL CONJUNTO
Precio original $ 80.75 - Precio original $ 80.75Precio original$ 80.75$ 80.75 - $ 80.75Precio actual $ 80.75 -
Watts Disyuntor de presión antisifón de bronce de 1 pulg., cierre de cuarto de vuelta, manijas en T
Watts Water TechnologiesPrecio original $ 360.10 - Precio original $ 360.10Precio original$ 360.10$ 360.10 - $ 360.10Precio actual $ 360.10Descripción del Producto Tamaño: 1" Este interruptor de vacío de presión antisifón de 1 pulgada evita que el flujo inverso de agua contam...
Ver todos los detallesPrecio original $ 360.10 - Precio original $ 360.10Precio original$ 360.10$ 360.10 - $ 360.10Precio actual $ 360.10 -
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 - 11/2-LF009M2-QT-S - 1 1/2 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$ 1,413.13$ 1,413.13 - $ 1,413.13Precio actual $ 1,413.131 1/2 IN Lead Free Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff Valves, Bronze Strainer Lead Free: YES This 1 1/2 inch ...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 1,413.13$ 1,413.13 - $ 1,413.13Precio actual $ 1,413.13
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