Fittings for concealed distribution systems

The massive use of cross-linked polyethylene pipe has made it necessary to make some additions to the system to minimise the inconveniences caused by use of this type of pipe. One of the main set-backs is, in fact, its high elasticity which makes it quite difficult to make wall connections for sanitary fittings and radiator valves. Without the aid of specific fittings, the aesthetic result of these derivations is questionable even when using pipe cover plates. Use of polyethylene pipe is greatly simplified by utilising hydraulic derivation boxes (in the same way as for domestic electric appliances) which also give a matchless aesthetic appearance.

These derivation boxes, with their templates, provide fixed distances for the connections of sanitary fittings and the possibility of choosing the depth at which the fittings are attached within the wall according to the thickness of the covering foreseen. When the derivations are destined to heating bodies, the use of the chrome-plated extensions RR702 and AGE06/07 plates definitely give the derivation a better appearance (no more flaking walls, sloping pipes, hanging radiators). The derivation boxes allow sheath seams to be crimped (always recommended for problems of heat expansion), forming a single element that, when necessary, permits the pipe to be extracted and replaced with a new one without having to break the wall. All the hot-galvanised iron templates can be divided when used singly. The SS1711 boxes can be united using two channelled guides to obtain a minimum distance of 38mm for heating purposes with single-pipe valves and 3- and 4-way distributors. The template supplied can be used for distances of 38, 50, 100, 153 mm to satisfy all derivation needs both for heating and for sanitary appliances. SS1730 - SS1735 boxes with 105° fittings are provided with a rubber sealing plug to isolate the box itself from the circuit. If the fitting drips, the loss can immediately be found in the box itself and does not protract along the sheath.

The M24 and EUROKONUS threads on the derivations make it possible to use all the fittings for polyethylene, multilayer and copper pipes. When using these last two types of pipe obviously the pipe cannot be extracted because of its greater rigidity, but all the other workmanlike characteristics of the system are maintained as well as their attractive appearance.