Back Flows
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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Febco 860-QT RP 100 1 in. 860 Reduced Pressure Zone Assembly
FebcoOriginal price $ 206.18 - Original price $ 206.18Original price $ 206.18$ 593.68$ 593.68 - $ 593.68Current price $ 593.68Febco 860-QT RP 100 1 in. 860 Reduced Pressure Zone Assembly Brand: Febco | SKU: 860-QT RP 100 Important Lead-Free Notice This item is not lead...
View full detailsOriginal price $ 206.18 - Original price $ 206.18Original price $ 206.18$ 593.68$ 593.68 - $ 593.68Current price $ 593.68 -
Febco 905211 Bonnet Repair Kit for 1/2 in. and 3/4 in. 765 PVB
FebcoOriginal price $ 54.63 - Original price $ 54.63Original price$ 54.63$ 54.63 - $ 54.63Current price $ 54.63Febco 905211 Bonnet Repair Kit for 1/2 in. and 3/4 in. 765 PVB Brand: Febco | SKU: 905211 Product Overview The Febco 905211 bonnet repair kit i...
View full detailsOriginal price $ 54.63 - Original price $ 54.63Original price$ 54.63$ 54.63 - $ 54.63Current price $ 54.63 -
Febco T765EUB 1 in. Bronze PVB Backflow Preventer with Unions and Freeze Sensor
FebcoOriginal price $ 217.32 - Original price $ 217.32Original price $ 217.32$ 217.32$ 217.32 - $ 217.32Current price $ 217.32Febco T765EUB 1 in. Bronze PVB Backflow Preventer with Unions and Freeze Sensor Brand: Febco | SKU: T765EUB Important Lead-Free Notice This pro...
View full detailsOriginal price $ 217.32 - Original price $ 217.32Original price $ 217.32$ 217.32$ 217.32 - $ 217.32Current price $ 217.32 -
Febco F1313 1 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 525.99 - Original price $ 525.99Original price $ 525.99$ 588.06$ 588.06 - $ 588.06Current price $ 588.06Febco F1313 1 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F1313 Important Lead-Free Notice This product i...
View full detailsOriginal price $ 525.99 - Original price $ 525.99Original price $ 525.99$ 588.06$ 588.06 - $ 588.06Current price $ 588.06 -
Febco 905212 Bonnet and Poppet Assembly Kit for 1 in. and 1-1/4 in. 765 Valves
FebcoOriginal price $ 61.71 - Original price $ 61.71Original price$ 61.71$ 61.71 - $ 61.71Current price $ 61.71Febco 905212 Bonnet and Poppet Assembly Kit for 1 in. and 1-1/4 in. 765 Valves Brand: Febco | SKU: 905212 Product Overview The Febco 905212 bon...
View full detailsOriginal price $ 61.71 - Original price $ 61.71Original price$ 61.71$ 61.71 - $ 61.71Current price $ 61.71 -
Febco F2812 3/4 in. 860U-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 0.00 - Original price $ 0.00Original price $ 0.00$ 464.97$ 464.97 - $ 464.97Current price $ 464.97Febco F2812 3/4 in. 860U-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F2812 Important Lead-Free Notice This item d...
View full detailsOriginal price $ 0.00 - Original price $ 0.00Original price $ 0.00$ 464.97$ 464.97 - $ 464.97Current price $ 464.97 -
Febco 905049 Poppet Assembly Kit for 1/2 in. and 3/4 in. 765 PVB
FebcoOriginal price $ 26.08 - Original price $ 26.08Original price $ 26.08$ 26.08$ 26.08 - $ 26.08Current price $ 26.08Febco 905049 Poppet Assembly Kit for 1/2 in. and 3/4 in. 765 PVB Brand: Febco | SKU: 905049 Product Overview The Febco 905049 poppet assembly k...
View full detailsOriginal price $ 26.08 - Original price $ 26.08Original price $ 26.08$ 26.08$ 26.08 - $ 26.08Current price $ 26.08 -
Febco F1314 1-1/4 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 0.00 - Original price $ 0.00Original price $ 0.00$ 885.90$ 885.90 - $ 885.90Current price $ 885.90Febco F1314 1-1/4 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F1314 Important Lead-Free Notice This item ...
View full detailsOriginal price $ 0.00 - Original price $ 0.00Original price $ 0.00$ 885.90$ 885.90 - $ 885.90Current price $ 885.90Sold out -
Febco F1316 2 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 1.00 - Original price $ 1.00Original price $ 1.00$ 1,391.24$ 1,391.24 - $ 1,391.24Current price $ 1,391.24Febco F1316 2 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F1316 Important Lead-Free Notice This item does...
View full detailsOriginal price $ 1.00 - Original price $ 1.00Original price $ 1.00$ 1,391.24$ 1,391.24 - $ 1,391.24Current price $ 1,391.24 -
Febco T765FBV 1-1/4 in. Bronze Pressure Vacuum Breaker with Freeze Sensor
FebcoOriginal price $ 653.33 - Original price $ 653.33Original price $ 653.33$ 756.03$ 756.03 - $ 756.03Current price $ 756.03Febco T765FBV 1-1/4 in. Bronze Pressure Vacuum Breaker with Freeze Sensor Brand: Febco | SKU: T765FBV Important Lead-Free Notice This product i...
View full detailsOriginal price $ 653.33 - Original price $ 653.33Original price $ 653.33$ 756.03$ 756.03 - $ 756.03Current price $ 756.03Sold out -
Febco T765GBV 1-1/2 in. Bronze Pressure Vacuum Breaker with Freeze Sensor
FebcoOriginal price $ 733.23 - Original price $ 733.23Original price $ 733.23$ 830.36$ 830.36 - $ 830.36Current price $ 830.36Febco T765GBV 1-1/2 in. Bronze Pressure Vacuum Breaker with Freeze Sensor Brand: Febco | SKU: T765GBV Important Lead-Free Notice This product i...
View full detailsOriginal price $ 733.23 - Original price $ 733.23Original price $ 733.23$ 830.36$ 830.36 - $ 830.36Current price $ 830.36 -
Febco F1312 3/4 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 489.99 - Original price $ 489.99Original price $ 489.99$ 501.09$ 501.09 - $ 501.09Current price $ 501.09Febco F1312 3/4 in. 860-QT-FS Bronze RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F1312 Important Lead-Free Notice This product...
View full detailsOriginal price $ 489.99 - Original price $ 489.99Original price $ 489.99$ 501.09$ 501.09 - $ 501.09Current price $ 501.09 -
Febco LF650A-2 2 in. Lead Free Wye Strainer, 20 Mesh
FebcoOriginal price $ 294.70 - Original price $ 294.70Original price $ 294.70$ 294.70$ 294.70 - $ 294.70Current price $ 294.70Febco LF650A-2 2 in. Lead Free Wye Strainer, 20 Mesh Brand: Febco | SKU: LF650A-2 Product Overview The Febco LF650A-2 is a 2 in. lead free Wye ...
View full detailsOriginal price $ 294.70 - Original price $ 294.70Original price $ 294.70$ 294.70$ 294.70 - $ 294.70Current price $ 294.70 -
Febco F683004 LF860-QT-FS 1-1/2 in. Lead Free RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 1,388.29 - Original price $ 1,388.29Original price $ 1,388.29$ 1,388.29$ 1,388.29 - $ 1,388.29Current price $ 1,388.29Febco F683004 LF860-QT-FS 1-1/2 in. Lead Free RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F683004 Product Overview The Febco F...
View full detailsOriginal price $ 1,388.29 - Original price $ 1,388.29Original price $ 1,388.29$ 1,388.29$ 1,388.29 - $ 1,388.29Current price $ 1,388.29 -
Febco F683005 LF860-QT-FS 2 in. Lead Free RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 1,219.36 - Original price $ 1,219.36Original price $ 1,219.36$ 1,567.50$ 1,567.50 - $ 1,567.50Current price $ 1,567.50Febco F683005 LF860-QT-FS 2 in. Lead Free RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F683005 Product Overview The Febco F6830...
View full detailsOriginal price $ 1,219.36 - Original price $ 1,219.36Original price $ 1,219.36$ 1,567.50$ 1,567.50 - $ 1,567.50Current price $ 1,567.50 -
Febco F683002 LF860-QT-FS 1 in. Lead Free RPZ Backflow Preventer with Flood Sensor
FebcoOriginal price $ 560.08 - Original price $ 560.08Original price $ 560.08$ 719.99$ 719.99 - $ 719.99Current price $ 719.99Febco F683002 LF860-QT-FS 1 in. Lead Free RPZ Backflow Preventer with Flood Sensor Brand: Febco | SKU: F683002 Product Overview The Febco F6830...
View full detailsOriginal price $ 560.08 - Original price $ 560.08Original price $ 560.08$ 719.99$ 719.99 - $ 719.99Current price $ 719.99Sold out -
Febco FP-FBF-BMS-IMS-FZ BMS/IMS Freeze Sensor Connection Kit
FebcoOriginal price $ 146.61 - Original price $ 146.61Original price $ 146.61$ 146.61$ 146.61 - $ 146.61Current price $ 146.61Febco FP-FBF-BMS-IMS-FZ BMS/IMS Freeze Sensor Connection Kit Brand: Febco | SKU: FP-FBF-BMS-IMS-FZ Product Overview The Febco FP-FBF-BMS-IMS-FZ...
View full detailsOriginal price $ 146.61 - Original price $ 146.61Original price $ 146.61$ 146.61$ 146.61 - $ 146.61Current price $ 146.61Sold out -
Febco T765HBV 2 in. Bronze Pressure Vacuum Breaker with Freeze Sensor
FebcoOriginal price $ 786.00 - Original price $ 786.00Original price $ 786.00$ 922.86$ 922.86 - $ 922.86Current price $ 922.86Febco T765HBV 2 in. Bronze Pressure Vacuum Breaker with Freeze Sensor Brand: Febco | SKU: T765HBV Important Lead-Free Notice This product is li...
View full detailsOriginal price $ 786.00 - Original price $ 786.00Original price $ 786.00$ 922.86$ 922.86 - $ 922.86Current price $ 922.86 -
Febco T765EBV 1 in. Bronze Pressure Vacuum Breaker with Freeze Sensor
FebcoOriginal price $ 136.24 - Original price $ 136.24Original price $ 136.24$ 244.34$ 244.34 - $ 244.34Current price $ 244.34Febco T765EBV 1 in. Bronze Pressure Vacuum Breaker with Freeze Sensor Brand: Febco | SKU: T765EBV Important Lead-Free Notice This product is li...
View full detailsOriginal price $ 136.24 - Original price $ 136.24Original price $ 136.24$ 244.34$ 244.34 - $ 244.34Current price $ 244.34
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