Hi, I am to put in a shower tray upstairs. The ceiling below will be dropped to accommodate the shower drain pipe then it drops into a utility cupboard on the ground floor where the soil pipe is. I like the idea of having a HepVo trap in the cupboard where it is easily accessible in case of maintenance or replacement. I do not like the idea of taking ceilings down in the future. Does anyone know if there is just a shower tray drain assembly that is only an elbow spigot not a trap?