Type size for Dry riser and Sprinkler stop valve signs

[Guest Neil]

Hi,

I was wandering if there is any regulations for the type sizes for indoor Dry riser and Sprinkler stop valve signs. I am trying to purchase a sign but heard they should be at least 50mm but this seemed to big from the signs I have seen. Thank you for your time.

[AnthonyB]

It's usually based on the distance the sign needs to be viewed from, 50mm letter height can give you around 10m viewing distance, smaller letters lesser distances.