The new Thomas Dudley 313348 Niagara dual flush valves is the ideal replacement for most toilet valves and can be used in exposed plastic or ceramic cisterns with an internal height of 330mm - 408mm. Come with dual flush chrome plated push button sits neatly in the cistern lid and incorporates easily recognisable segments for full and reduced flushes. Bayonet fitting enables valve body to be simply removed from the cistern. Maintenance can then be carried out in minutes without disconnecting the water supply or dismantling the cistern.