The following spare parts are available for the model number VSO20:
Gas Valves
| Part name | Also known as |
| 201857 - Sigma Gas Valve | Sigma solenoid valve |
| 201914 - Sigma Gas Valve (LPG) | Sigma solenoid valve (LPG) |
| 202404 - Gas Valve | solenoid valve |
| 202528 - White Rodgers Gas Valve 36J 41K-200B1 (AA) (LPG) | White Rodgers solenoid valve 36J 41K-200B1 (AA) (LPG) |
| 202657 - Honeywell Gas Valve LPG | Honeywell solenoid valve LPG |
| 202748 - White Rogers Replacement Gas Valve Kit (Nat Gas) | White Rogers Replacement solenoid valve Kit (Nat Gas) |
| 202749 - White Rogers Replacement Gas Valve Kit LPG | White Rogers Replacement solenoid valve Kit LPG |
| 900375 - Lead To Suit Sigma Gas Valve | Lead To Suit Sigma solenoid valve |
| M200106-S - Rings To Suit Sigma Gas Valve | Rings To Suit Sigma solenoid valve |
Other Heater Components
| Part name | Also known as |
| 201488-1 - Gasket Set |