Hi! Sorry for off topic but since so many DCHS pool builders visit this forum....
what would be the best way to enlarge a semi-circular hole in a concrete wall that's ~3.75" in diameter
so a 4" ABS pipe can be installed that's around 4 1/4" in outer diameter?
This is to improve a remote hot springs. I won't have any access to an electrical outlet. I cannot use gas powered tools
due to fire restrictions.
I can only use a battery powered equipment that's brusheless (no sparks). I owe a Makita rechargebale drill that's brushless.
Many thanks in advance.
P.S. Moderator, please leave this topic for few days before deleting it. Thx