Backflow Preventer

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Inline backflow preventer for sprinklers?

I have installed an irrigation system of sprinkler heads with 1/2" pipe on a hillside. The problem is that when the sprinkler valve shuts off, the residual water left in the lines drain out through the lowest sprinkler head which is a lot of water and is pretty wasteful. Is there an inline backflow preventer that I can install just after that sprinkler head?

There is an irrigation part called a check valve. There is a flap inside that the water pressure will allow it to open, then close if the water comes from the opposite direction. All irrigation parts store have them for a few bucks.

Discover Backflow Preventer On eBay Below:

NEW IN BOX WATTS NO8A 3 4 HOSE CONNECTION VACUUM BREAKER BACK FLOW PREVENTER
NEW IN BOX WATTS NO8A 3 4 HOSE CONNECTION VACUUM BREAKER BACK FLOW PREVENTER
$21.85
Watts 0881240 BFP RK Backflow Preventer Complete Repair Kit for 900 Series
Watts 0881240 BFP RK Backflow Preventer Complete Repair Kit for 900 Series
$264.99
WILKINS RK4 950 REPAIR KIT FOR BACKFLOW PREVENTER
WILKINS RK4 950 REPAIR KIT FOR BACKFLOW PREVENTER
$25.00
WATTS RK909 RT3 4 1 BACKFLOW PREVENTER NEW IN FACTORY BAG
WATTS RK909 RT3 4 1 BACKFLOW PREVENTER NEW IN FACTORY BAG
$61.00
APOLLO CONBRACO 40104A2 3 4 BACKFLOW PREVENTER BRASS BALL VALVE Q6751 DCV
APOLLO CONBRACO 40104A2 3 4 BACKFLOW PREVENTER BRASS BALL VALVE Q6751 DCV
$149.99
Watts Regulator 909 Reduced Pressure Backflow Preventer Size 4 Max Psi 175
Watts Regulator 909 Reduced Pressure Backflow Preventer Size 4 Max Psi 175
$759.99
Watts 1LF009M2QT Reduced Pressure Zone Backflow Preventer
Watts 1LF009M2QT Reduced Pressure Zone Backflow Preventer
$220.00
WATTS REGULATOR BACKFLOW PREVENTER VALVE SIZE 2 1 2 NUMBER 900
WATTS REGULATOR BACKFLOW PREVENTER VALVE SIZE 2 1 2 NUMBER 900
$699.99
BRAND NEW Apollo 40 4A4 4AMC 3 4 Back Flow Preventer
BRAND NEW Apollo 40 4A4 4AMC 3 4 Back Flow Preventer
$45.00
Watts Regulator CO909 Series 175PSI NEW 1 1 4 Backflow Preventer
Watts Regulator CO909 Series 175PSI NEW 1 1 4 Backflow Preventer
$1,000.00
Matco Norca 646AS4LF Back Flow Preventer Brass Finish
Matco Norca 646AS4LF Back Flow Preventer Brass Finish
$25.00
WATTS 909 M1QT RP 1 1 2 BRONZE REDUCED PRESSURE BACKFLOW PREVENTER
WATTS 909 M1QT RP 1 1 2 BRONZE REDUCED PRESSURE BACKFLOW PREVENTER
$249.99
Watts No8A Back Siphonage Back Flow Preventer Non Removable  FREE SHIPPING
Watts No8A Back Siphonage Back Flow Preventer Non Removable FREE SHIPPING
$14.99
Watts No8 Back Siphonage Back Flow Preventer
Watts No8 Back Siphonage Back Flow Preventer
$11.99
Watts No8A Back Siphonage Back Flow Preventer
Watts No8A Back Siphonage Back Flow Preventer
$24.99
Watts Fluid Air 8A Back Siphonage Backflow Preventer
Watts Fluid Air 8A Back Siphonage Backflow Preventer
$56.77
Watts Fluid Air 8A Back Siphonage Backflow Preventer Pack of 5
Watts Fluid Air 8A Back Siphonage Backflow Preventer Pack of 5
$36.77
BACKFLOW PREVENTER 2 INCH APOLLO CONBRACO 40208T2 BARELY USED
BACKFLOW PREVENTER 2 INCH APOLLO CONBRACO 40208T2 BARELY USED
$249.00
Wilkins RK 014 Backflow Preventer Rubber Repair Kit Model 575  550
Wilkins RK 014 Backflow Preventer Rubber Repair Kit Model 575 550
$32.00
Apollo 3R 180 01 Backflow Preventer 120 PSI USED
Apollo 3R 180 01 Backflow Preventer 120 PSI USED
$99.99
Watts Fluid Air 0061913 Backflow Preventer 3 8 9BD NPTM for Carbon Dioxide Gas
Watts Fluid Air 0061913 Backflow Preventer 3 8 9BD NPTM for Carbon Dioxide Gas
$79.99
WATTS  3 4 REDUCED PRESSURE BACKFLOW PREVENTER NIB  009 QT M2 PZB
WATTS 3 4 REDUCED PRESSURE BACKFLOW PREVENTER NIB 009 QT M2 PZB
$299.99
Watts Fluid Air 0061913 Backflow Preventer 3 8 9BD NPTM for Carbon Dioxide Gas
Watts Fluid Air 0061913 Backflow Preventer 3 8 9BD NPTM for Carbon Dioxide Gas
$85.45
WATTS  3 8 BACKFLOW PREVENTER NIB 0061913  9BD NPTM
WATTS 3 8 BACKFLOW PREVENTER NIB 0061913 9BD NPTM
$185.99
WATTS  BACKFLOW PREVENTER NIB  PBD
WATTS BACKFLOW PREVENTER NIB PBD
$115.99
WATTS 0061888 BACKFLOW PREVENTER 3 4 NEW
WATTS 0061888 BACKFLOW PREVENTER 3 4 NEW
$45.00
New WATTS Cu7 U2 U2 3 4x3 4 Backflow Preventer 0064041 Body Dual check valve
New WATTS Cu7 U2 U2 3 4x3 4 Backflow Preventer 0064041 Body Dual check valve
$30.39
NEW Watts 115 1115 ACV Backflow Preventer Rubber Repair Kit 4 MPN 3302 01
NEW Watts 115 1115 ACV Backflow Preventer Rubber Repair Kit 4 MPN 3302 01
$140.00
1 Nib Watts 9D M2 Backflow Preventer 3 4 Inch 9DM2 175 Psi
1 Nib Watts 9D M2 Backflow Preventer 3 4 Inch 9DM2 175 Psi
$49.99
WATTS  1 4 BACKFLOW PREVENTER NIB EDP 0061911  9BD NPTM
WATTS 1 4 BACKFLOW PREVENTER NIB EDP 0061911 9BD NPTM
$185.00
NIB WATTS RK 909 CK2 6 BACKFLOW PREVENTER SECOUND CHECK VALVE KIT 6 0887217
NIB WATTS RK 909 CK2 6 BACKFLOW PREVENTER SECOUND CHECK VALVE KIT 6 0887217
$950.00
WATTS 3 8 LF7 DUAL CHECK VALVE BACKFLOW PREVENTER 3 8 FNPT NEW
WATTS 3 8 LF7 DUAL CHECK VALVE BACKFLOW PREVENTER 3 8 FNPT NEW
$149.95
Apollo DCA4A F34 3 4 Backflow Preventer Double Check Valve 4A 104 A2F NIB
Apollo DCA4A F34 3 4 Backflow Preventer Double Check Valve 4A 104 A2F NIB
$99.99
NEW OLD STOCK ZURN WILKINS DOUBLE CHECK BACKFLOW PREVENTER XL350 LEAD FREE
NEW OLD STOCK ZURN WILKINS DOUBLE CHECK BACKFLOW PREVENTER XL350 LEAD FREE
$149.95
WATTS REGULATOR MODEL 7U2 2 DUAL CHECK BACKFLOW PREVENTER UNUSED 1116
WATTS REGULATOR MODEL 7U2 2 DUAL CHECK BACKFLOW PREVENTER UNUSED 1116
$40.00
Watts Fluid Air 0061913 Backflow Preventer 3 8 9BD NPTM for Carbon Dioxide Gas
Watts Fluid Air 0061913 Backflow Preventer 3 8 9BD NPTM for Carbon Dioxide Gas
$129.99
Watts Fluid Air 0061911 Backflow Preventer 1 4 9BD NPTM
Watts Fluid Air 0061911 Backflow Preventer 1 4 9BD NPTM
$210.77
New Watts 405 Backflow Preventer Gate Valve Stem Kit 4 MPN 0889481
New Watts 405 Backflow Preventer Gate Valve Stem Kit 4 MPN 0889481
$315.00
American Backflow Products CO Backflow Preventer Repair Manual New
American Backflow Products CO Backflow Preventer Repair Manual New
$30.00

Just Purchased Backflow Preventer:


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