| Mains Pressure |
Over and above 0.2 to 10 bar pressure |
| VA |
Apparent power |
| AC |
Alternating current |
| V |
Volt |
| DC |
Direct current |
| Hz |
Hertz, unit of frequency |
| Bar |
Unit of pressure measurement |
| C |
Degrees Celsius |
| Tu |
Ambient temperature |
| Tm |
Medium temperature |
| EN |
European norm |
| UL |
Underwriters laboratories (USA) |
| BEAB |
British Electrotechnical Approvals Board |
| NSF |
National Sanitation Foundation (USA) |
| WRAC |
Water Research Council |
| BSP |
British standard pipe thread |
| NPT |
National pipe thread (USA) |
| GAZ |
Equivalent to British Standard pipe
thread |