[Trog]

Does anyone know when painting vacuum pipes red for fitted and white for piped started?
If this was pre nationalisation, was it just some of the companies, and did they all use the same colour code?

 

[Saint Johnstoun]

I think this was a BR thing from the 1950s-60s. Piped vehicles were normally painted grey anyway!

The other matter which I have never been able to sort out is vehicles piped for steam heat!