Barming Pest Control have Drain Surveying equipment to carry out detailed CCTV surveys

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Stainless steel has proved to be the best material (we don’t like plastic).  We’ve used many different types of non-return valve over the years and have one in particular that we use day in day out that we know and trust to work exceptionally well.  If Rats enter your home though the drains a Rat flap will totally stop them without excavation. BUT sometimes there is not one magic bullet for all rat problems and the only answer is to excavate, obviously this involves some upheaval and disruption but ultimately it is a means to an end.