The condenser cap is used to collect and drain condensation through the drain. Stainless Steel Condensation Drain Plug.
Stainless Steel Condensation Drain Plug / Flue Liner Cap / Chimney Tube Plug
Condensation Drain Plug Flue Collection Cap Tee Cap
Stainless Steel Condensation Drain Plug / Flue Cap
SAUERMANN SI 61 SI61Sauermann Pump - Condensation Drain Pump Boilers
Morco 8mm Drain Plug Washer (10 Pack) - FW0597
Windkat Chimney Cowl 130mm plug-in 125mm stove, fire, cap, pot by windkatcowls