Hi, we are having a small wc built in a new extension. Soil pipe comes up direct from floor (i.e. connects to drain underground). Toilet will have to be positioned close to / in front of it as there is no other place for it to go as it is a small room - so pan connector will need to be 90 degrees into floor. But we will need to get the basin waste into the same soil pipe. Would there be sufficient space between top of the pan connector and bottom of cistern to have a boss. Can you get 90 degree pan connectors for taking waste horizontal, that also take in basin waste? Thanks