Maywick M.B.C.
The Standard model provides: Gas at full pressure - high temperature and Gas at reduced pressure - low temperature.
The MBC/G model provides: Gas at full pressure - high temperature and Gas at reduced pressure - low temperature.
Gas completely off (on/off mode)
Both models automatically revert to the low position in the event of an electrical supply failure, but an emergency manual tap can be opened to increase the temperature if necessary. A second manually operated tap can be adjusted to reduce the maximum amount of heat in the house when conditions require it.