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.
-
Zurn Wilkins 12-375XL 1/2" 375 Reduced Pressure Principle Backflow Preventer
Zurn WilkinsPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 867.99$ 867.99 - $ 867.99Precio actual $ 867.99The Zurn Wilkins 375XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The EZSwap Pr...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 867.99$ 867.99 - $ 867.99Precio actual $ 867.99 -
Zurn 3-375AST 3" Reduced Pressure Principle Backflow Preventer with Stainless Steel Body
Zurn WilkinsPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 5,635.99$ 5,635.99 - $ 5,635.99Precio actual $ 5,635.99The 375AST Reduced Pressure Principle Backflow Assembly is utilized in high hazard applications for all applications and market segments, protectin...
Ver todos los detallesPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 5,635.99$ 5,635.99 - $ 5,635.99Precio actual $ 5,635.99 -
Zurn Wilkins - 2-975XL2 2" 975XL2 Reduced Pressure Principle Assembly (Lead Free)
Zurn WilkinsPrecio original $ 2,107.99 - Precio original $ 2,107.99Precio original$ 2,107.99$ 2,107.99 - $ 2,107.99Precio actual $ 2,107.99The 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 $ 2,107.99 - Precio original $ 2,107.99Precio original$ 2,107.99$ 2,107.99 - $ 2,107.99Precio actual $ 2,107.99 -
Zurn Wilkins 3" 375A Flanged NRS Reduced Pressure Principle Assembly
Zurn WilkinsPrecio original $ 5,635.99 - Precio original $ 5,635.99Precio original$ 5,635.99$ 5,635.99 - $ 5,635.99Precio actual $ 5,635.99The Zurn Wilkins 375A Reduced Pressure Principle Backflow Preventer provides high hazard protection for all market segments. The grooved, epoxy...
Ver todos los detallesPrecio original $ 5,635.99 - Precio original $ 5,635.99Precio original$ 5,635.99$ 5,635.99 - $ 5,635.99Precio actual $ 5,635.99 -
Zurn Wilkins 112-375XL 1-1/2" 375 Reduced Pressure Principle Backflow Preventer
Zurn WilkinsPrecio original $ 0.00 - Precio original $ 0.00Precio original $ 0.00$ 1,644.99$ 1,644.99 - $ 1,644.99Precio actual $ 1,644.99375 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$ 1,644.99$ 1,644.99 - $ 1,644.99Precio actual $ 1,644.99 -
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 2-NR3XLDUC 2" NR3XL Pressure Reducing Valve with Double Union FNPT Copper Sweat Union Connection
Zurn WilkinsPrecio original $ 1,321.99 - Precio original $ 1,321.99Precio original$ 1,321.99$ 1,321.99 - $ 1,321.99Precio actual $ 1,321.99Our 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 $ 1,321.99 - Precio original $ 1,321.99Precio original$ 1,321.99$ 1,321.99 - $ 1,321.99Precio actual $ 1,321.99Agotado -
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 2-600XL 2" 600XL Pressure Reducing Valve
Zurn WilkinsPrecio original $ 1,477.99 - Precio original $ 1,477.99Precio original$ 1,477.99$ 1,477.99 - $ 1,477.99Precio actual $ 1,477.99The 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 $ 1,477.99 - Precio original $ 1,477.99Precio original$ 1,477.99$ 1,477.99 - $ 1,477.99Precio actual $ 1,477.99Agotado -
Zurn Wilkins 1-NR3XLDUC 1" NR3XL Pressure Reducing Valve with Double Union FNPT Copper Sweat Connection
Zurn WilkinsPrecio original $ 266.99 - Precio original $ 266.99Precio original$ 266.99$ 266.99 - $ 266.99Precio actual $ 266.99Our 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 $ 266.99 - Precio original $ 266.99Precio original$ 266.99$ 266.99 - $ 266.99Precio actual $ 266.99Agotado -
Zurn Wilkins 1-NR3XLDU 1 in. NR3XL Pressure Reducing Valve, Double Union FNPT Connections
Zurn WilkinsPrecio original $ 266.99 - Precio original $ 266.99Precio original$ 266.99$ 266.99 - $ 266.99Precio actual $ 266.99Our 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 $ 266.99 - Precio original $ 266.99Precio original$ 266.99$ 266.99 - $ 266.99Precio actual $ 266.99Agotado -
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 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 34-600XL 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 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 - 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
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....