| 680 | 301 222 | Operator | | |
| 681 | 301 224 | Solenoid | | |
| 4254 | 333 722 | Auto Air Vent | | |
| 5356 | 301 023 | Main Heat Exchanger | | |
| 5640 | 301 034 | Spark Electrode | | |
| 5853 | 301 221 | Sense Electrod | | |
| 6025 | 379 279 | Grundfos UPS 15-50 AO Pump | | |
| 6492 | 301 213 | Fan | | |
| 6872 | 301 188 | Flow Diapragm | | |
| 6882 | 301 180 | Domestic Diapragm | | |
| 7070 | 379 736 | Pressure Differential Switch | | |
| 7095 | 301 217 | Main Burner (N.G.) | | |
| 7096 | 301 219 | Main Burner (N.G.) | | |
| 7097 | 301 239 | Ignition Control Box | | |
| 7098 | 301 216 | Gas Service Cock | | |
| 7099 | 301 214 | Cold Water Inlet Service Cock (Adjustable) | | |
| 7204 | 301 145 | Expansion Vessel | | |
| 7236 | 301 227 | Thermistor | | |
| 7239 | 301 210 | Combined Pressure & Temperature Gauge | | |
| 7260 | 379 296 | Gas Valve Complete | | |
| 8031 | 301 256 | Modulator Coil Complete | | |
| 8037 | 301 336 | Domestic Heat Exchanger | | |
| 8428 | 301 342 | Heating Flow & Return Manifold | | |
| 8429 | 301 339 | Domestic Manifold Section | | |
| 8433 | 301 343 | Safety Valve | | |
| 8447 | 301 347 | D.H.W. Microswitch | | |
