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