A heat-exchange radiator (1) is connected to a fluid flow circuit by a connector (19) which provides one member (21) of an interengageable spigot and socket pair (21 and 25) for push-fit, fluid-tight, engagement between the connector and the radiator, with latching formations (22 and 27) at least one of which is resilient. Preferably the connector carries the spigot which tapers and engages with a socket of corresponding shape, the spigot carrying an O-ring seal (23) and either latching fingers (42) or a resilient latching circlip (22).
A radiator for a centralized heating system includes a plurality of tubular elements (1) and (2), reciprocally connected. The radiator is inserted in a hydraulic circuit in which flows a liquid heated by a boiler and circulated in a natural or forced manner. The liquid gives heat to the exterior through the lateral surfaces of the tubular elements. The tubular elements (1) and (2) are fixed one to the other by screw elements (3) which are provided with hydraulic sealing means whereby the discharge of the liquid from the tubular elements is prevented.
A quick connector for establishing a connection between a flexible tube and an interior chamber of a vessel. The vessel has a wall structure through which a mounting bore extends. A canister assembly associated with the quick connector includes a housing is adapted for installation in the mounting bore, a retainer coupled to the housing that adapted to accept and retain a port connector of the hose therein, and a spring clip for coupling the housing to the wall structure. Flanged ends of the spring clip are retained in, and project outwardly from, corresponding apertures formed through a leading end of the housing. Upon installation of the housing into the mounting bore, the end flanges are deflected inwardly until the leading end of the housing extends beyond the mounting bore. Then the flanged ends return to their expanded condition, thereby coupling the canister assembly to the vessel.
