I have a soil vent pipe which is boxed in to the corner of my bathroom. On all but the warmest days condensation runs down the outside of the pipe and drips into the garage below (there is an offset in the pipe so condensation falls off at the bend). I have tried solutions including ventilating the pipe top and bottom, and filling the box with loose insulation or loft insulation but nothing changes. So I'm admitting defeat and want to trap the condensation somehow so I can run it back into the soil pipe. However the only condensation traps I can find online are for internal condensation in air vent systems - is there anything available for external condensation? If not, any ideas please for making something from scratch?
Thanks.
Thanks.