With the aim to make installation easier, KARMAT produces the 50mm backwater valve in versions A, B and C . They are used in all sewage-related systems such as washbasins, sinks, shower bases, dishwashers and washing machines. - Manufactured in different versions making installation possible into any type of system; - Designated for installation inside a house or a flat; - Aesthetically designed. Efficient protection against rodents - Compatible with the standard, the safe distance of the bottom of the casing ensures proper operation and allows for the self-cleaning of the valves; - The shape of the chromium-nickel stainless steel guard protects the flap and gasket from damage by rodents and the slipping of the seals during sewage flow; - Smooth and properly shaped internal surface allows free flow of sewage and makes the accumulation of deposits or the blocking up of the valve impossible. Version A: The backwater valve 50mm in version A is fitted in the horizontal course of 50mm sewage pipework attached to the wall by means of brackets. A non-return valve installed in such a way can protect several facilities at the same time if they are connected to the same sewage system such as a bath or shower base traps. Version B: The backwater valve in version B is connected to the 50mm pipe socket of an existing pipe fitting in the wall. A special aesthetic masking rosette allows the valve to be mounted to the wall by means of two screws. This protects the system from self- detachment in cases of increased pressure in the system caused by sewage backflow. To the device mounted in a such way, the trap (e.g. a washbasin) is to be connected by means of a special connector with a screw cap. Version C: Backwater valve 50mm in version C is designed for installation in new or altered sewage systems. It is mounted to the wall by means of a special 50mm elbow which is to be connected to the valve with a special nut, that also takes the role of a masking rosette at the same time. The backwater valve 50mm in version C is designed for installation in new or renovated buildings.The elbow enables to orient the outflow, at any angle, to the left or to the right and protects the system from self-detachment in the case of increased pressure in the sewage system caused by sewage backflow.