NOVENT® Caps fit the standard "Schraeder" service valve on all central AC units and Minisplits, and provide an innovative way to prevent access by unauthorized persons. Patented NOVENT® Caps are precision machined from high grade brass surrounded by a protective aluminum shroud and can only be fitted and removed with a special tool.

Corrosion resistant. Integral neoprene O-ring resists all oils. R22 & R410 caps are color coded & embossed for easy ID of refrigerant gas. Silver caps include adhesive labels for commonly used refrigerants. Integral torque limiter prevents overtightening Easy to ID pocket tools or screwdriver tools fit all 3 cap types. Resist crushing and removal without key. Yellow warning label for AC unit is included.