Adding holes in a Cast Iron Bathtub

[BhamRuss]

What's the feasiblity/practicality of drilling a cast iron bathtub to retrofit whirlpool hydro-massage components?

[Terry]

It's hard to drill cast iron. But it can be done. They do make bits for that but it's going to be a very hard job for someone.
I would beg off on it.

[jadnashua]

Adding holes means probably cracking of the glaze. That leads to rust. I'd be very leary about making holes for those reasons.

[hj]

If you were here, I would refer you to the company which does it. IT is seldom a DIY project.