Porcelanosa Services LimitedAlbert Street. Wednesbury.West Midlands. WS 10 7EW

Tel: 0121 502 4666/4999 Fax 0121 502 4888

NB valve (year 2001>) Thermostatic Cartridge Help Sheet

Located at the bottom of the outer oval trim is a screwdriver slot. Carefully prise off this trim. The knobs and diverter controls do not have to be removed to remove this trim.

This reveals the hot and cold inlet filters – hot left (RED) and cold right (BLUE). Using a 10mm socket (early models 13mm). TURN OFF water supply and unscrew the inlet filter anti-clockwise and withdraw from the body. Contained in this assembly is also an anti-return valve. It is possible to access this by removing the filter mesh circlip and removing the mesh.Take care when refitting the filters so as not to cross-thread the filter when replacing it back in the body.

To remove the thermostatic cartridge, prise of the domed knob cap revealing a brass screw. Remove this and pull off the thermostatic cartridge control. Remove the black locking ring, noting its position. Prise off the conical trim (with temperature scale on it), noting its position.To remove the cartridge use a spanner on the chrome hex to undo – it is an anti-clockwise thread – Pull out cartridge taking care not to damage the O ring seals.

Use a hex spanner to undo the bottom brass plug (anti-clockwise thread). It is tensioned with a spring. Remove this plug and spring and carefully withdraw the bi-metal adjuster and the Teflon-coated flow chamber from the body. Check that the small brass pin in the end of the adjuster is capable of moving freely and the rubber sleeving is undamaged (by gently heating the base of this part will enable the pin to rise, thus proving it to work correctly).De-scale and silicone grease (water resistant, fine) all components before reassembly. It is also possible to unscrew the chrome parts from the brass parts to access the turning mechanism if it requires greasing.