You can only use this if your boiler has a threaded hole in the back or front plate of your boiler.
Not for Sight Glass type boilers.
MAMOD TYPES: SE2/ SE3 STATIONARY ENGINES
3/16th BSW (course) thread.
NOT SUITABLE FOR:
TRACTION ENGINES (TE1A),
STEAM ROLLERS (SR1A),
STEAM WAGONS (SW1),
CARS (SA1)
AND OTHER STATIONARY ENGINES