A 175mm black twin wall tee cap with drain is used to close off and provide access to the flue system at the base, typically at a tee junction. The tee cap can be easily removed for sweeping and inspection purposes and includes a 10mm threaded drain point for condensate.
Twin-wall flues are designed with two layers of stainless steel, providing insulation between the flue gases and the surrounding environment. This design helps prevent condensation and ensures proper flue performance, even in condensing applications.