I have the replacement & it doesn't appear to have any locating bits so it looks as if it may turn, however as there is a nut on the end i'm not 100% confident.
I'm going to email Bristan & see what they say.
Thanks for the replies
Hi,
Have a bristan pisa shower. I am trying to replace the thermostat cartridge but cannot get the old one out. I Have removed the control knobs, retaining plate & plastic washer but it will not budge. Have tried hitting it with a hammer to loosen any limescale.
Tried turning it but it...