Replacement TRV heads

[paulw]

I need to replace several TRV heads but can't source the original "Boss" heads.
Is there a suitable alternative, are all heads the same?
Thanks

 

[snowhead]

No they aren't all the same, there are various thread sizes / fixing types / operating pin length.

Do you have a photo of your TRV head?

BOSS is the brand name of Wolseley merchants but the TRVs are probably made by another company.

Are they anything like this, description says have been badged as BOSS?

Replacement TRV Head for Giacomini / Barlo

www.heatingcontrolsonline.co.uk