Flowflex Pipe Cowl

Flowflex Pipe Cowl fittings help you finish a boiler pressure-relief discharge neatly with fewer site-made joints. Instead of building the terminal from separate tube and bends, this range gives you a purpose-made pre-soldered copper termination fitting that needs one soldered connection. That means a tidier external finish, less fabrication at the wall, and a more repeatable result when you want the discharge termination to look consistent from job to job.

The key choice is size first, then format. In this collection, standard Pipe Cowls are available for 15mm and 22mm arrangements, so you can match the fitting to the discharge pipe size required by the appliance and route. There is also an extended version for 15mm applications. This includes 400mm of copper tube and can be a practical option where a high-level termination may be completed from inside the building, provided the wall construction, access and safe working conditions allow it.

That extended option is useful when you are trying to reduce site fabrication outside the property, but it is not a shortcut around installation checks. The Pipe Cowl is the termination component only. It is not a pressure-relief valve, tundish or substitute for the discharge pipework itself. Before choosing, check the appliance discharge connection, required pipe diameter, wall position and how much projection you need at the outlet.

For supported product credentials, the Flowflex Pipe Cowl range is manufactured in copper to BS EN 1254 and is NHBC approved. The main practical benefit is still the same. You get a one-fitting, one-joint termination design that can help simplify the last part of the run compared with making up a terminal from separate parts on site. If you are comparing broader jointing components for the rest of the route, it may also help to browse Plumbing Fittings.

To choose confidently, match the cowl to the specified discharge arrangement rather than the wall opening alone. Standard 15mm and 22mm versions suit straightforward terminations where the route already brings you to the exit point. The extended 15mm version is the one to consider when the installation layout may benefit from extra reach through the wall. Whichever you choose, the complete discharge pipe arrangement still needs to follow the boiler manufacturer’s instructions and applicable requirements.