TRV Sticking constantly

[JohnD]

I wonder if this is some kind of balancing valve, perhaps if the rad circuit was extended with extra rads after being built?

does it have a wheel-shaped head rather than a T-shaped head?

some photos of the pipe layout around this valve may help (though if you are getting a plumber in he will probably sort it)

I have my bathroom radiator on a special loop tapped off the flow and return in front of the 3-port valve, and this has to be specially balanced to stop it stealing all the flow.

 

[browneye23]

This last post more to find out peoples general thoughts on what are good a decent CH Pump.

I have never heard of Myson so probably will just go for the DAB.
Grundfos you pay double for the brand.

 

[browneye23]

My pump is knackered anyway, so I will change this first and see if it allows the flow to all radiators.

Thanks for all your help.