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How to build a wood fired hot tub

Step 13Perforate the tub

Perforate the tub
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With the heater leaned against the spot on the outside of the tub that you want it to be, mark the locations of the outlet and inlet pipes on the corrugated iron cladding.

Think about where the hot tub is going to end up before you cut the holes to make sure you have it in the best place for your situation.

Drill out the holes and smooth off the sharp edges.

Now slide the liner all the way into the tub shell and mark the location of the pipes. Cut the holes for the pipes making sure you only make them as large as the outside diameter of the flanged pipe fittings you are using.
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Author:veloboy(I'm building a strawbale house)