Shut Off Valves for Old Hot Water Radiators

What size piping do you need the TRV's or rad valves for? I have some 3/4" TRV's (bodies and actuators) that I never used. I set up my refurbed rads on balanced zones.

I used union elbows above the floor for convenience and ball valves below the floor to balance the system. I added zones for thermostatic control but it can also be achieved with thermostatic radiator valves (TRV). Technically, you shouldn't design a system which will allow all radiators to be shut down unless you have a dp valve installed linking the supply and return runs between the boiler and the radiators. Radiators should be sized to the room's BTU requirements. No radiator should be shut down completely.

PM me if you are interested. I'll part with them cheap.

Thanks. It was an inquiry for another person whom, I think, has found some.