Anti-syphon valve

[dataylor]

I need an anti-syphon valve to prevent a chemical tank emptying if the outlet line breaks. Wallace and Tiernan used to make one but do not anymore. The only ones I can find are to be placed on the discharge side of pumps but mine would need to be on the suction side.

 

[TD2K]

I don't know anti-syphon valves for what you are looking for but you could look for an excess flow valve, try google.