Drainage Issues With Interceptor Traps

The old adage that you are never more than six feet away from a rat might be a slight exaggeration, particularly for people living in more rural areas of the country like Oxfordshire. But this idea has caused enough insecurity for people to ‘protect’ their drainage systems by installing rat interceptor traps. The idea is simple, a one way hinged doorway on the exposed area of the pipe allows for waste water to flow in one direction and will stop any small animal from crawling up against the flow. However, sometimes the interceptor trap does more harm than good.

Darren and Stanley recently attended a property that had experienced drainage issues for many years. The drainpipe frequently blocked and was causing issues within the property. Darren and Stanley identified the interceptor trap as being the most likely cause for drain blockage issues. Whilst the trap will allow for waste water to flow one way, if something blocked the movement of the door on one side then waste would back up along the pipe losing momentum and causing a potential blockage. They assessed the area and concluded that this particular interceptor trap was probably not necessary and in order to protect the drainage system it would be better to remove the trap and ensure a free flowing drain.

Underground Pipe and manhole

A short while later, Darren and Stanley found themselves at another drainage issue with an interceptor trap. A similar issue was happening, but after assessing the area and situation they both concluded that an interceptor trap needed to remain as they saw evidence of rat activity. They fitted a WRC approved stainless steel rat flap to eliminate entry to the domestic drainage system.

interceptor trap in drainage