Disposable valve for an endoscope optionally having a lubricant and/or an antimicrobial agent

A disposable valve assembly configured for use with an endoscope, the disposable valve assembly comprising:

• a stem comprising a proximal end and a distal end and a first opening disposed along a longitudinal axis of the stem, the stem comprising a thermoplastic material and a second opening transverse to and intersecting with the first opening, the second opening of the stem partially extending through the stem;
• a spring stanchion comprising an opening configured to receive the stem, the spring stanchion and/or a spring configured to allow movement of the stem in an upward and downward direction relative to the proximal and/or distal end;
• and the spring configured to contact the spring stanchion, wherein the distal end of the stem further comprises an end rim having a surface and a plurality of seals disposed on the surface;
• and a groove partially extending radially around the circumference of the stem and disposed immediately adjacent to the second opening and the surface of the end rim.