Case study at Abbey Wharf Residential Housing - A warm summer Sunday evening at 7pm and APS engineers were called out to a housing development where toilets were backing up and sewage was overflowing into gardens. APS attended within half an hour to find well known pumps severely blocked. The blockages were dealt with and within a few days it was the same story. APS installed new Javelin pumps (show image of BT pump) which is outperforming the original pumps and there hasn’t been a blockage since......that was two years ago.