Backflow Preventer

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:

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
AMES FIRE SPRINKLER SYSTEM BACKFLOW PREVENTER SIZE 4
AMES FIRE SPRINKLER SYSTEM BACKFLOW PREVENTER SIZE 4
$1,795.00
NEW WATS 909 M10T RP 1 1 4 BACKFLOW PREVENTER
NEW WATS 909 M10T RP 1 1 4 BACKFLOW PREVENTER
$350.00
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
1 Bonnet Poppet Assembly Backflow Preventer Repair Kit Febco 765
1 Bonnet Poppet Assembly Backflow Preventer Repair Kit Febco 765
$42.36
PRICE DROP Wilkins 975XL 975XL2 Backflow Preventer Air Gap 1 4 1 2 MPN AG 8
PRICE DROP Wilkins 975XL 975XL2 Backflow Preventer Air Gap 1 4 1 2 MPN AG 8
$57.00
LEGEND VALVE 115 114 BACKFLOW PREVENTER NEW IN BOX
LEGEND VALVE 115 114 BACKFLOW PREVENTER NEW IN BOX
$68.00
WATTS 1 1 4 BACKFLOW PREVENTER REDUCED PRESSURE ZONE ASSEMBLY RPZ MOD 009 1 1 4
WATTS 1 1 4 BACKFLOW PREVENTER REDUCED PRESSURE ZONE ASSEMBLY RPZ MOD 009 1 1 4
$300.00
Watts Fluid Air 8A Back Siphonage Backflow Preventer Pack of 3
Watts Fluid Air 8A Back Siphonage Backflow Preventer Pack of 3
$66.77
WATTS 909 LF 4 BACKFLOW PREVENTER 0385801
WATTS 909 LF 4 BACKFLOW PREVENTER 0385801
$1,988.88
1 Bonnet Poppet Assembly Backflow Preventer Repair Kit Febco 765
1 Bonnet Poppet Assembly Backflow Preventer Repair Kit Febco 765
$40.22
Watts Regulator 8A Siphonage 3 4 Backflow Preventer
Watts Regulator 8A Siphonage 3 4 Backflow Preventer
$6.99
Back Siphonage 8A Backflow Preventer
Back Siphonage 8A Backflow Preventer
$8.50
WATTS 3 4 9D M2 BACKFLOW PREVENTER NEW IN BOX
WATTS 3 4 9D M2 BACKFLOW PREVENTER NEW IN BOX
$51.00
Watts Brass Tubular 9D M3 1 2 1 2 Backflow Preventer
Watts Brass Tubular 9D M3 1 2 1 2 Backflow Preventer
$56.18
WILKINS WILRK4 950 REPAIR KIT FOR BACKFLOW PREVENTER
WILKINS WILRK4 950 REPAIR KIT FOR BACKFLOW PREVENTER
$80.00
2 INCH BACKFLOW PREVENTER APOLLO CONBRACO 40208T2 2 IN BARELY USED
2 INCH BACKFLOW PREVENTER APOLLO CONBRACO 40208T2 2 IN BARELY USED
$250.00
HONEYWELL BACKFLOW PREVENTER W FILLMATIC PRESSURE REDUCING VALVE BP900
HONEYWELL BACKFLOW PREVENTER W FILLMATIC PRESSURE REDUCING VALVE BP900
$69.99
1 Bonnet Poppet Assembly Backflow Preventer Repair Kit Febco 765
1 Bonnet Poppet Assembly Backflow Preventer Repair Kit Febco 765
$40.22
O RINGS SERIES 909 REDUCED PRESSURE ZONE BACKFLOW PREVENTERS 3 4 AND 2 G59
O RINGS SERIES 909 REDUCED PRESSURE ZONE BACKFLOW PREVENTERS 3 4 AND 2 G59
$7.87
WATTS RK909 RT3 4 1 BACKFLOW PREVENTER NEW IN FACTORY BAG
WATTS RK909 RT3 4 1 BACKFLOW PREVENTER NEW IN FACTORY BAG
$61.00
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
APOLLO CONBRACO 40104A2 3 4 BACKFLOW PREVENTER BRASS BALL VALVE Q6751 DCV
APOLLO CONBRACO 40104A2 3 4 BACKFLOW PREVENTER BRASS BALL VALVE Q6751 DCV
$197.01
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
1 double check valve backflow preventer
1 double check valve backflow preventer
$60.00
WATTS 1 1 4 X 1 1 4 REDUCED PRESSURE ZONE BACKFLOW PREVENTER ASSEMBLY 009M2QT
WATTS 1 1 4 X 1 1 4 REDUCED PRESSURE ZONE BACKFLOW PREVENTER ASSEMBLY 009M2QT
$299.00
BRAND NEW Apollo 40 4A4 4AMC 3 4 Back Flow Preventer
BRAND NEW Apollo 40 4A4 4AMC 3 4 Back Flow Preventer
$45.00
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
NEW Zurn Wilkins 1 375 Reduced Pressure Zone Backflow Preventer G2689653 1
NEW Zurn Wilkins 1 375 Reduced Pressure Zone Backflow Preventer G2689653 1
$182.29
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 Used
Watts Fluid Air 8A Back Siphonage Backflow Preventer Pack of 5 Used
$36.77
Watts Reduced Pressure Zone Backflow Preventer Bronze Watts 909 Series FNPT
Watts Reduced Pressure Zone Backflow Preventer Bronze Watts 909 Series FNPT
$816.99
Watts Reduced Pressure Zone Backflow Preventer Bronze Watts 909 Series FNPT
Watts Reduced Pressure Zone Backflow Preventer Bronze Watts 909 Series FNPT
$1,262.42
Watts Backflow Preventer Repair Kit For Use With Watts No 21 2 757 OSY 3 757
Watts Backflow Preventer Repair Kit For Use With Watts No 21 2 757 OSY 3 757
$50.01
Watts Backflow Preventer Repair Kit For Use With Mfr No 21 2 909 NRS 3 909
Watts Backflow Preventer Repair Kit For Use With Mfr No 21 2 909 NRS 3 909
$323.99

Just Purchased Backflow Preventer:


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