I've purchased a dishwasher supposedly with exact same dimensions as the previous however swapping out hasn't been as straightforward as I imagined. The issue is a waste pipe, ever so slightly in the way and preventing the dishwasher from a flush fitting. There's about 25mm in it. The connector pipe appears to have an unnecessary T fitting (see pic). I was thinking about swapping out the connector and have 2 questions:
1) Is that T unnecessary? Or is it some type of non-return valve
2) If it's solvent welded I've read that I'll have to saw the pipe off. If so do I cut, insert a new length of pipe and then solvent weld with 2 40mm Straight Coupler's?