I do not have access to my shop at the moment. Could someone tell me the thread size of the whistle or pressure guage threads ( i assume they,re both the same) on my wilesco T125 boiler. Wanting to buy a bolt the right size and drill it out to make an air line adaptor.
Thanks,
crazydoug
The new whistle with chain has a M6x1 thread...and yes, the current whistle/pressure gauge threads should be identical.