Reading Southland council website they do require a permit to install a woodburning heater.
And it's very hard to get a concent to install a used wood burner as it needs to be recertified
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cause they can lay blame of old stuff on someone else...wasnt me.....someone else mustve said it was ok.....
Do you mean as a mould or in the furnace? Ok in a mould but won't last in the furnace. Even green sand only lasts one pour before it needs new bentonite clay, coal dust and water added along with a good mix.
Good on you for having a go.
Watching a 65t tap at Glenbrock Steel is an impressive sight.
If you want foundry consumables locally call METCAST and ask for Gordon, he will be able to help. Not a spectator I work there now.