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Anti-Siphon Valve
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![2 Inch Angle Check Valve - Single Poppet Spring Loaded 2 Inch Angle Check Valve - Single Poppet Spring Loaded](https://shop.sourcena.com/lowres/nophoto.gif)
2 Inch Angle Check Valve - Single Poppet Spring Loaded
Item No. 137-0300AV
Fitted with a light spring & soft seat made for standard check valve applications
![1-1/2 Inch Anti-Syphon Valve 5 To 10 Foot Head Pressure 1-1/2 Inch Anti-Syphon Valve 5 To 10 Foot Head Pressure](https://shop.sourcena.com/lowres/detail/199ASV-2150.jpg)
1-1/2 Inch Anti-Syphon Valve 5 To 10 Foot Head Pressure
Item No. 199ASV-2150
Factory-adjusted hydrostatic head pressure settings
![2 Inch Anti-Syphon Valve 5 To 10 Foot Head Pressure 2 Inch Anti-Syphon Valve 5 To 10 Foot Head Pressure](https://shop.sourcena.com/lowres/detail/199ASV-2200.jpg)
2 Inch Anti-Syphon Valve 5 To 10 Foot Head Pressure
Item No. 199ASV-2200
Factory-adjusted hydrostatic head pressure settings
![2 Inch Anti-Syphon Valve 10 To 15 Foot Head Pressure 2 Inch Anti-Syphon Valve 10 To 15 Foot Head Pressure](https://shop.sourcena.com/lowres/nophoto.gif)
2 Inch Anti-Syphon Valve 10 To 15 Foot Head Pressure
Item No. 199ASV-3200
Factory-adjusted hydrostatic head pressure settings
![1 1/2 Inch Buna Union Check Valve With Screen 1 1/2 Inch Buna Union Check Valve With Screen](https://shop.sourcena.com/lowres/detail/200AS-15.jpg)
1 1/2 Inch Buna Union Check Valve With Screen
Item No. 200AS-15
Easily inserted onto existing union fittings in suction systems
![2 Inch Pressure Relief Nipple Check Valve Bronze Viton Seats 2 Inch Pressure Relief Nipple Check Valve Bronze Viton Seats](https://shop.sourcena.com/lowres/detail/212VPR-20-3650.jpg)
2 Inch Pressure Relief Nipple Check Valve Bronze Viton Seats
Item No. 212VPR-20-3650
Mounted in fuel lines at the submersible pump to hold the prime and prevent premature tripping of mechanical leak detectors
![1-1/2 Inch Swing Check Valve - Threaded Brass 1-1/2 Inch Swing Check Valve - Threaded Brass](https://shop.sourcena.com/lowres/detail/246A-0100AV.jpg)
1-1/2 Inch Swing Check Valve - Threaded Brass
Item No. 246A-0100AV
Designed to prevent backflow in horizontal piping systems. Swing check valve allow liquid to flow in a single direction
![2 Inch Swing Check Valve - Threaded Brass 2 Inch Swing Check Valve - Threaded Brass](https://shop.sourcena.com/lowres/detail/246A-0200AV.jpg)
2 Inch Swing Check Valve - Threaded Brass
Item No. 246A-0200AV
Designed to prevent backflow in horizontal piping systems. Swing check valve allow liquid to flow in a single direction
![2 Inch Swing Check Valve - Threaded Brass With Thermal Expansion Relief At 25 Psi 2 Inch Swing Check Valve - Threaded Brass With Thermal Expansion Relief At 25 Psi](https://shop.sourcena.com/lowres/detail/246A-0600AV.jpg)
2 Inch Swing Check Valve - Threaded Brass With Thermal Expansion Relief At 25 Psi
Item No. 246A-0600AV
Designed to prevent backflow in horizontal piping systems. Swing check valve allow liquid to flow in a single direction
![2 Inch Threaded Ductile Iron Swing Check Valve 2 Inch Threaded Ductile Iron Swing Check Valve](https://shop.sourcena.com/lowres/nophoto.gif)
2 Inch Threaded Ductile Iron Swing Check Valve
Item No. 246ADI-0500AV
Designed to prevent backflow in horizontal piping systems. Swing check valve allow liquid to flow in a single direction
![2 Inch Nipple Check Valve With 25 Psi Expansion Relief 2 Inch Nipple Check Valve With 25 Psi Expansion Relief](https://shop.sourcena.com/lowres/detail/530-0100AV.jpg)
2 Inch Nipple Check Valve With 25 Psi Expansion Relief
Item No. 530-0100AV
One way check valve used to prevent backflow
![1-1/2 Inch Vertical Check Valve With Shear Groove (E85) 1-1/2 Inch Vertical Check Valve With Shear Groove (E85)](https://shop.sourcena.com/lowres/detail/70-0070.jpg)
1-1/2 Inch Vertical Check Valve With Shear Groove (E85)
Item No. 70-0070
OPW Vertical Check Valves are installed the inlet to the pump in the dispenser island to maintain prime
![1-1/2 Inch Vertical Check Valve With Test Port And Shear Groove Boss Mount (E85) 1-1/2 Inch Vertical Check Valve With Test Port And Shear Groove Boss Mount (E85)](https://shop.sourcena.com/lowres/detail/70S-0075.jpg)
1-1/2 Inch Vertical Check Valve With Test Port And Shear Groove Boss Mount (E85)
Item No. 70S-0075
OPW Vertical Check Valves are installed the inlet to the pump in the dispenser island to maintain prime
![1-1/2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C. 1-1/2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.](https://shop.sourcena.com/lowres/detail/910-1100AV.jpg)
1-1/2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.
Item No. 910-1100AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C. 2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.](https://shop.sourcena.com/lowres/detail/910-2000AV.jpg)
2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.
Item No. 910-2000AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C. 2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.](https://shop.sourcena.com/lowres/detail/910-2100AV.jpg)
2 Inch NPT 90 Degree Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.
Item No. 910-2100AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![1/2 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C. 1/2 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.](https://shop.sourcena.com/lowres/detail/912-050500AV.jpg)
1/2 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.
Item No. 912-050500AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![1/2 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C. 1/2 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.](https://shop.sourcena.com/lowres/detail/912-051000AV.jpg)
1/2 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.
Item No. 912-051000AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![3/4 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C. 3/4 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.](https://shop.sourcena.com/lowres/detail/912-070500AV.jpg)
3/4 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.
Item No. 912-070500AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![3/4 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C. 3/4 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.](https://shop.sourcena.com/lowres/detail/912-071000AV.jpg)
3/4 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.
Item No. 912-071000AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![1 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C. 1 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.](https://shop.sourcena.com/lowres/detail/912-100500AV.jpg)
1 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 0-5 Foot W.C.
Item No. 912-100500AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.
![1 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C. 1 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.](https://shop.sourcena.com/lowres/detail/912-101000AV.jpg)
1 Inch NPT Stainless Steel Inline Anti-Siphon Valve With Thermal Expansion Relief 5-10 Foot W.C.
Item No. 912-101000AV
Normally closed valve helps prevent accidental siphoning of product from tank due to downstream leak below liquid level.