The importance of injection port maintenance has been well documented by instrument and column companies industry wide. Restek has made it easy to carry out this maintenance with the innovation of our EZ Twist Top injection port.
The split vent trap connected to the EPC module/block on your 6850/6890/7820 Agilent GC determines which EZ Twist Top injection port you need. Simply remove the top and rear panels of the GC to determine if you have a small pencil-type filter (cat.# 22820) or a large canister filter (cat.# 23031) attached to the split vent gas line.
For pencil filters, you need the EZ Twist Top injection port shown here. For canister filters, you need EZ Twist Top port cat.# 22735 or 22736.