Many states require a back flow preventer to not allow a hose connected to fresh water to be immersed in a chemical spray tank. AN air gap is an effective way to accomplish this. Its also a convenient way to hold a fill hose.
Legal in most states (except California)
Minimum 4" gap (1" inner dia x 2 specification compliant)
Stainless steel bracket and hardware
Botls to the top of any tank
You might also be interested in...