Summit Valve Identification ArticleJune 13, 2011 Summit 1 Valve The Summit 1 Valve (item# 1492) is solid gray. It has a big round cap that is attached by a plastic loop (item# 1492.2). The Summit 1 Adapter (item# 1492.1) is solid gray and measures 5/8" from tip to O-ring. Summit 2 Valve The Summit 2 Valve (item# 1493) has a blue seal on the cap. It has a smaller cap (item# 1493.2) that is attached by a lanyard. The Summit 2 Adapter (item# 1493.1) has a blue ring and measures 13/16" from tip to O-ring.