Please help, I was bleeding the radiators in my house. 3 of the radiators when i tried to bleed them i have stripped the head of the square headed screw. I have tried everything to loosen them. J have tried several different keys. Is there any tool possibly with a smaller head or some other way of removing the screw. I woudl appreciate your solutions!!!!
Three options available depending of the type of rad you have, assuming it is a pressed steel item with an air bleed in a bolt in fitting, isolate the rad drain off the water from the rad and replace the bolt in fitting with a new item giving you a new air bleed.
If the rad is a pressed steel item with a air bleed tapped directly in to the rad (no bolt fitting) as above drain the rad, drill the air bleed out with a suitable size drill and re tap the thread allowing you to fit a new air bleed nipple.
If non of the above work you may need to replace the rad with a new item, all of the above will mean you need to refill and bleed the complete system again so be sure you really need to bleed the rad before you start (ie a cold area of rad at the top when the system is running)