Product Description The HOME-FLEX Termination Flange provides a smooth transition between CSST and standard pipe. Tool-less flare design; no special tools are required. Metal-to-metal seal, with no split rings, o-rings or gaskets. Self-guiding assembly to ensure a perfectly even flare. From the Manufacturer A termination flange provides a smooth transition between CSST and standard pipe. Tool-less flare design; no special tools are required. Metal-to-metal seal, with no split rings, O-rings or gaskets. Self-guiding assembly to ensure a perfectly even flare.