can i fix a central heating radiator with a pin prick?

This is usually symptomatic of a larger problem,get a plumber/heating engineer to call and test the water in the system.It may need cleansed/flushed and an inhibitor put in.

Gasman
August 2008

Short answer is no. The pinprick hole has developed from the inside so any patch you put on it will only be very temporary. You also have to bear in mind that the water in the radiator will be under pressure and along with thermal expansion and contraction your leak will return a little bit worse each time.
NB. Plumbers mait is a waste of time anyway as a hole sealing product

Cledlyn
August 2008