As far as we know Mamod have used 2 different types of regulator valves on the Brunel boiler, one being the standard gas valve at that time, the other having a larger diameter shaft (like mine).TTHLRMatt wrote:Does anyone know the thread used on the regulator valve? I know its the same as the gas valve.
Best to contact Mamod for the definitive answer. They do seem to be replying to E-mails at present (although they are related to the Thomas Telford development) otherwise give them a phone and ask for Peter Johnston, their designer. Contact details already discussed on Page 2 here - http://gardenrails.myfreeforum.org/ftop ... asc-15.php
Chris Cairns