A toilet (WC) Toilet with Piped Water It has a door that could be closed. A toilet (WC) may be classified as follows: 1. Toilet with Piped Water: This category applies when there is a toilet connected to water resources or when there is a water tap in the toilet. 2. Toilet without Piped Water: This category applies when there is a toilet that is not connected to water resources. 3. No Toilet: This category applies when there is no separate toilet in the Housing unit.