A display system for exercise equipment in accordance with the present invention includes a processor, a memory, a metric sensor and a metric display. The trailer brake valve is activated via a first control-pressure line which extends between the brake line and the trailer brake valve and via a second control-pressure line which extends between the trailer brake valve and a control-pressure source and acts in opposition to the pressure imposed on the trailer brake valve by the first control-pressure line. The SG receives a Call Setup request, including a source IP address and a destination telephone number. Such a combustion chamber improves combustion by maintaining a generally uniform fuel spray spacing to the combustion chamber walls. The resultant siloxane coating further improves the moisture resistance of the phosphor.