On 01/03/2021 16:29, Glenn Matthews wrote:
Yup - that's about the temperature (!) I'll see if I can get my IR thermometer on it later and find out roughly what 'ouch fkit hot' equates to....

IR thermometers aren't very accurate on shiny pipes. You might want to
stick some opaque tape on it.

See

https://www.flukeprocessinstruments.com/en-us/service-and-support/knowledge-center/infrared-technology/what-is-emissivity

AKA https://tinyurl.com/ybwqfn36

Andy