Recently a number of guys have taken on the job of building their own boilers, so I thought I'd do my bit by a quick "how to cut a hole in SS"
After a little trawl around the internet I found these Q-max cutters.
The "washer type bit" in the middle is the section it cuts out, no burrs or sharp edges finished job.
To start with I put a 5mm hole, then took this out to 10mm. This is the size of the bolt with the cutter.
This photo shows the finished hole..
This is with the tank connector fitted...I made a bottom drain for my setup.
The last two's photo are a little fuzzy they show the larger Q-max cutter that I used for the elements just about to come through the side of the pot.
On this one you can just see through the 2nd hole and see the first element fitted.
ps..all most forgot the last photo..