Hindusthan Electric House supplies Diesel Decontamination Units with ½", 3/4" or 1" Diameter Fuel Line Compatibility. Hindusthan Electric House offers LEDs, Diesel Decontamination Units and Free Air Pre-Cleaners. Diesel Decontamination Units with ½", 3/4" or 1" Diameter Fuel Line Compatibility has been designed to connect into a fuel line with limited flexibility.