Hi, I have quite a shallow fall on the waste pipes from my shower and bath and when the bath empties it smells a bit. I was considering using caustic soda to hopefully shift any hair and give the pipes a clean, but as there isn't actually a blockage will the caustic soda solution just run straight out without doing much use?
Also I'm not sure if caustic soda is safe to use on an enamel bath and on a "stone resin" shower tray.
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