by any means that provide air and water tight joints alternatively the housing 46 and tube 14 can be fabricated integrally the housing 46 is the same diameter as the tube 14 at the proximal end 50 but of larger diameter at the distal end 54 there are three bores 58 a 58 b 62 through the housing 46 the large central one 62 mates with the central bore 18 through the tube 14 at the proximal end 50 and terminates in a rubber collar 66 at the distal end 54 this collar 66 provides an air and water tight seal when the endoscope head 70 is fully advanced into the housing 46 this collar 66 is also designed to mate with vacuum and lavage tubing of an appropriate size with an air and water tight seal the two smaller peripheral bores 58 a 58 b intersect the large central bore 62 within the housing 46 and terminate in fittings 74 a 74 b at the distal end 54 the large bores 18 62 through the tube 14 and housing 46 are adapted to loosely receive the tube 22 of an endoscope 26 the fittings 74 a 74 b are adapted to mate with externally supplied fluid and vacuum lines in an alternative embodiment the tube 14 has a central bore 18 there through and the housing 46 has a hollow center 48 the central bore 18 is large enough to loosely receive an endoscope tube there is a collar 66 at the distal end 54 which adapts the housing to form an air and water tight seal with the head 70 of an endoscope the collar 66.