Image 1 of 1 Additel 9231 - Contamination prevention system, for ADT760A, with communication cable $875.00 Add To Cart Added! Additel 9231 - Contamination prevention system.Part Number: 9231. Additel 9231 - Contamination prevention system.Part Number: 9231. You Might Also Like Additel 100-BSPF2Q Adapter from $197.00 Additel ADT901B-B2-KIT - Test kit for ADT901, 901A, or 901B pump (hose barb fitting, hose, etc.) $239.00 Additel 9904-918 - Carrying case, space for Additel 918 Generator and two gauges $525.00 Additel 9919 Carrying Case for Handheld Calibrators Non-ex $466.00 Additel 9919EX-1 Carrying Case for ADT601Ex/ADT680AEx/ADT681AEx/ADT685Ex $237.00