Today I drilled 72 x 50mm holes in the grow beds for drains !! I discovered two things;
1) The bottom of the grow bed is too round for a neat fit of the drain fitting.
2) The wall is too thick for the thread of the fitting.
Mmmmm, so I sat and thought for a while and then came up with this cunning plan.
Used an angle grinder blade to recess the hole from top and bottom. This way it thinned the wall and provided a nice square surface to seal the fitting.
Now everthing fits nice and snug.
Temperatures today are worth noting.
Outside temp in the shade 17 deg C
Inside temp at midday (air) 32 deg C
Water temp at midday 22 deg C
Working in this heat is “interesting” and I stripped down to the bare essentials.
* Please note the next image is not for sensitive viewers. *
Enough for now.