Rad Valves and pipe work sizing

[Tommyo]

Hi guys normally just do boilers but i am looking at a leak for a friend,

Their towel rail sprung a leak and i have took it of and isolated it, the system is on plastic piping installed in 2010, Under floor downstairs and rads upstairs,

I am asking does any one know the size the pipe work might be as i am struggling to find replacement valves, its not 15mm not 22mm so i am unsure if its 18mm or in imperial?

i will add a couple of pictures if anyone can help me would be great thanks Tom

 

[snowhead]

I'd have thought the valves would be 1/2" and the plastic pipe has adapters on the end from 18mm or whatever, to 1/2" male.

https://fheprod.danfoss.com/PCMPDF/RA-FN_series_F_VDSXI202_teamcent.pdf

http://www.directheatingsupplies.co...P7QGJdM-YtkcTSEAJ12vzCtOrmtewP6RmGxoCcQbw_wcB

 

[chris watkins]

Looks like 16mm to me (i.e. very close to 15mm OD) if it is white & feels stiffer than Speedfit it could be Wunda 16mm PERT pipe.

16mm PERT-AL-PERT PIPE - Wunda Trade

 

[Tommyo]

So I need to replace the towel rail, I need to get 18mm reducers then to go from plastic pipe in to new rad valves is there adapters or valves made that make it look like a professional finish without putting reducers on etc