Drain fitting

Abstract

A drain fitting comprising a cage having a plurality of apertures extending through the cage; a conduit having an inlet and an outlet, the conduit extending at least partially through the cage; and a base cap attached to the cage, the outlet located within the base cap wherein the conduit includes an internal surface that extends from the inlet to the outlet, the internal surface increasing the velocity of the water substantially the length of the internal surface as the water passes from the inlet to the outlet.

Description

FIELD OF THE INVENTION[0001]This invention relates to a drain fitting. In particular, the invention relates to a drain fitting for use in floor and shower wastes for both commercial and domestic applications and will be described in this context. However, it should be appreciated that the drain fitting may be used for other applications.BACKGROUND OF THE INVENTION[0002]Waste water drain pipes have been around for thousands of years and still play an important part in most buildings throughout the world. A common problem with waste water drain pipes is that odours can be emitted from them that offend most people's olfactory senses. This is mainly due to debris, such as food, hair and / or detergent, passing into the waste water drain pipe, decomposing and creating putrid water.[0003]A reasonably effective way in which to overcome offensive smells that are emitted from waste water drain pipes is to install an S-bend. An S-bend provides a water seal in the pipe to prevent odours from pas...

AI Technical Summary

Benefits of technology

[0013]wherein the conduit includes an internal surface that extends from the inlet to the outlet, the internal surface increasing the velocity of the water substantially the length of the internal surface as the water 50 passes from the inlet to the outlet.

Problems solved by technology

A common problem with waste water drain pipes is that odours can be emitted from them that offend most people's olfactory senses.

This is mainly due to debris, such as food, hair and / or detergent, passing into the waste water drain pipe, decomposing and creating putrid water.

A difficulty with the S-bend is it is generally located a long way from the floor waste.

Therefore, debris can become stuck within the drain pipe between the floor waste and S-bend to create an unpleasant odour.

Further, a substantial proportion of the debris that creates odour floats in water.

The trapped debris, as described above, creates putrid water and an offensive smell.

Unfortunately, the drain fitting disclosed in WO 99 / 27199 has an inherent problem.

Debris that passes through the floor and shower wastes often become lodged in the base cap and / or the apertures.

This debris, as it decomposes, creates putrid water in base cap which can be smelt through the floor or shower waste.

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