Radiator valve replacement unsure how to connect microbore.

[LostInTheUnderflow]

Im trying to replace a stuck radiator valve as shown in the attached picture.
I'm replacing it with this: https://www.stevensonplumbing.co.uk/myson-trv-2-way-valve-body-only.html

I am unsure of the best way to connect the microbore into the valve.
Currently it looks like it has a microbore to 1/2 inch external thread adaptor.

 

[terryplumb]

Copper pipe ? If so solder a fitting reducer onto the pipe. Hopefully you will have some free play in the pipe if you need to gain some length.

 

[LostInTheUnderflow]

If I could get the same valve which took microbore I would buy that, but it needs to be 30mm thread on the TRV side. I'm home automating it at the same time.

 

[LostInTheUnderflow]

Thanks. Looks like I am going to have to drain the system. I was hoping to avoid that.

 

[LostInTheUnderflow]

Would it be daft to use this? https://www.stevensonplumbing.co.uk/15mm-x-1-2-inch-chrome-compression-female-adaptor.html

 

[LostInTheUnderflow]

The pipe is copper, just painted.

 

[terryplumb]

To do what exactly ???

 

[JimCrow]

https://www.warmsafeplumbingandheating.co.uk/product/danfoss-013g0149-ra-fn-angled-valve-1-2-15mm/

 

[LostInTheUnderflow]

In the attached picture:
The valve I am holding is the new valve. The one currently fitted has microbore going into a female 1/2 inch connection on the existing valve.
I'm just trying to plan what parts I need before I crack open the connection to the existing valve.
I'd rather not drian the system.

I did this on another radiator, and it was a drop in replacement because it had a nut and olive that fit right onto the new valve.

 

[LostInTheUnderflow]

This is what I succesfully installed on another radiator, but it had a nut and olive which accepted the new valve.

 

[JimCrow]

The TRV I posted is the same as your old one, just use the old existing nut and olive, it will fit the new valve.

 

[LostInTheUnderflow]

Thanks JimCrow, but I am also taking the oportunity to do some home automation, so I am actually going to use an electrical actuator, https://www.hotowell.com/Uploads/products/2020-07-15/en-DN151.jpg
which has a 30mm thread.

 

[RandomGrinch]

View attachment 259225 Thanks JimCrow, but I am also taking the oportunity to do some home automation, so I am actually going to use an electrical actuator, https://www.hotowell.com/Uploads/products/2020-07-15/en-DN151.jpg
which has a 30mm thread.

I think getting a valve body to fit, without adapting the pipework, would be a good first priority!
Getting a Danfoss RA (M23??) to M30 adapter may be a close second!

 

[LostInTheUnderflow]

Yep. I'm going to get the Danfoss RA posted by JImCrow. (Thanks). I originally printed an M30 adaptor for the actuator which worked, but a bit delicate. I thought I could use the same valve as I had used upstairs, but it is too much hastle. I can also get a metal adaptor for the M30 thread, if needed. Thanks all.