As regards the size of the ...
Published by Yashpal Morey, Proprietor at Eastern Star Consulting Engineers
As regards the size of the chamber, if it is merely a distribution point en-route, the size ranges from 2 minuits' to 5 minuites retention period i.e. capacity to accomodate the discharge received in 2 minutes to 5 minutes. For valves there should be no specific criteria in my opinion.