Just had a lovely hot shower after fitting a salamander pump today, i bought a surrey flange but when i started the job i realized it had a 1" connection and the top of my cylinder is a 3/4" female. Anyway after much panic (and a trip to 5 different plumbing shops) none had a 3/4" surrey so i ended up with a warix flange, BUT i used the top exit to go to the vent and the side exit to go to the shower (thats what you get for reading up too much on the s flange) its working fine but will i have to change it round or will it be ok. Sorry for waffling.