For my new Eurotronic Spirit smart radiator valves I needed a clean and easy adapter.

There are many adapters out there that are quite bulky, couldn't figure out why that would be necessary... So designed my own in a few minutes.

My radiators already had a dynamic valve on them. But the thread is M28. The new valves need M30.

This print creates a 2mm ring with a inner thread of M28 and a outer thread of M30.

Next I needed to extend the pin, which is done by the simple extension pin.

Print instructions

Print in the lowest resolution you can, using ASA or ABS.

The extension pin should be printed upside (with hole) down for best result.