An ultraviolet light can be inserted within {TAIL ~ the cartridge} to disinfect a fluid passageway of {HEAD ~ the cartridge} 
An ultraviolet light can be inserted within { TAIL ~ the cartridge } to disinfect a fluid passageway of { HEAD ~ the cartridge }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD