its not a 15mm for sure, the other pipes in the house are 15mm and this is much thicker.
22mm sounds right, but do I need to worry about the side where it joins the radiator ?
Recently moved to a new house and need to change the radiator valve in the bathroom as its leaking.
Am unsure of the size as the pipe coming into the radiator are much thicker than normal(Picture attached).
The incoming pipe is 70mm in circumference and the pipe between the valve and the...