Quote Originally Posted by SplanK View Post
I have Pegler Terrier II TVR bodies in my house and find the same whiste. The valves themselves are 'original' to the house.

I have a replaced a couple in the kids room with exactly the same make/model and that seems to have fixed the problem on those rads, or make it much much less noticable. I think although same make/model, comparing the 2 there are slight differences, one being the internal size of the valve area being ever so slightly smaller on the newer units compared to old. I keep meaning to do the rest but... meh.... effort lol
Interesting, thanks.

Might replace the kids bedroom ones while Iím doing a partial drain down to add an ABV. Worth a shot anyway.