I am about to install an Aqualux Tuff-Stone shower tray in a first floor bathroom. The waste will be on the side of the rectangular tray that is up against an external wall and will exit straight through the wall so there's not far to go with pipework. The tray is very heavy and I can't imagine ever wanting to move it once installed, so it's in for life, with no opportunity to service the waste trap (which will live between the joists in the void between bathroom floor and downstairs ceiling).
My thinking is to use a metal waste with removable grate and a simple p-trap and then head straight through the wall to a rodding point. I reckoned this would give me enough access to clear any blockages.
So my question is:
How do I ensure the waste is sealed for good against the tray? Silicone, Araldite epoxy, .....?
If I can be sure of getting a really good seal I was going to foam the entire space around the waste and trap for added stability.
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