A plastic tank contains a heating coil, the ends (3) of which are attached to a metal fitting (2) that passes through the tank wall (1) and provides a connection (12) with a seal for a heating fluid supply. The connection fitting (2) is encased on the insi...

The filler inlet system for tanks (2) comprises a tubular sleeve (3) which fits over the tank inlet (4). A sealing ring (13) is fitted between the two. The sleeve is held in place by a ring (8) inside the tank inlet which is bolted to it. This has a collar...