More Information on S Traps:
The 'S' Trap - normally with a twist joint half way. The trap is easily removed without disturbing the pipework if it's required to remove a blockage. The socket can be corrected via something like 270° from the horizontal plane to accommodate the position of the vertical waste pipe attached to it. Like the 'P' trap, the 'S trap' also needs a good amount of space around the waste outlet.
We provide a wide and extensive array of waste traps, such as anti-siphon units and S traps, to fit all sorts from toilets to wet rooms and kitchen sinks to washing machines. All water using appliances and fixtures within a house needs a water trap at the waste pipe to give a water seal to the drains or atmosphere, this prevents smells, bacteria and insects entering the property. Most contemporary waste plumbing (besides W.C.s) use either 32mm (1.25 inch) (for hand basins) or 40mm (1.5 inch) (such as sinks, bathrooms, showers, dishwashers, washing machines) plastic pipe and fittings (such as traps); pipe runs over 2m (6 ft ) can utilise 50mm (2 inch) diameter pipe to prevent siphon effect when the waste is utilised.
The dimensions quoted are the inner pipe dimensions (and also the waste outlet from the sink/basin/bath etc), the outer diameter of the pipework does vary between different manufacturers thus pipes and fitting might not be interchangeable. Among the most important facets of waste water traps is the depth of seal. Typically the waste pipe matches to the trap with a twist coupling (using a compression seal ring) or a push fit'O' ring coupling - there isn't much to select between the two types.