20-22 Wenlock Road, London, N1 7GU, United Kingdom.
The Local Manual Control Head is used for manual actuation of the cylinder. It is made of solid Brass. It is self-venting with a safety pin to prevent accidental discharge. This Local Manual Control Head features a local lever driven push rod that depresses a Schrader check valve, thereby venting the pressure from the top of the piston in the cylinder valve, allowing the piston to slide upward and commence cylinder discharge.