I'm installing a waste pump in wet zone area(ground floor concrete) Waste pump has 22mm feeds which I would normally connect to soil pipe with boss strap. However the soil pipe is clay embedded in concrete with a 90° pan connector going straight into the ground. I've seen the pan conns with waste outlet in 1 1/4 I just need to know if there's any adapters to go from 22mm speedfit into waste pipe????