SELF CONTAINED SYSTEMS Lower Capacity – Occasional Use No space below the toilet pedestal is required. These systems are most suited to lesser or part-time use. They are quick and easy to install and hence are popular for weekenders and sheds etc. SPLIT SYSTEMS Higher Capacity – Household / Commercial Use Split System toilets are the larger, greater capacity option. Underfloor clearance is needed for these systems and the height requirements vary to accommodate different toilet models.