Here are some key features and considerations of a waste tank for a double mains toilet:

1. Capacity: Waste tanks come in various sizes, typically ranging from 200 to 500 gallons (750 to 1,900 liters) or more. The capacity you choose depends on factors such as the number of users, frequency of use, and duration between waste disposal or emptying.

2. Connections and fittings: The waste tank should have appropriate connections and fittings to allow for easy attachment to the double mains toilet unit. This may include inlet and outlet connections, venting mechanisms, and seals to prevent leaks and odors.

3. Handling and transportation: Waste tanks should be designed with handles, lifting points, or other features that facilitate safe and convenient handling and transportation. Some tanks may also have integrated wheels or skids for easier movement.

4. Level indicators: To monitor the fill level of the waste tank, some models include built-in level indicators or gauges. These indicators can help determine when the tank needs to be emptied.

5. Disposal options: Waste tanks require regular emptying and proper disposal of the waste. Ensure that the tank has suitable access points or valves for waste removal, and consider the availability of waste disposal services in your area.

When selecting a waste tank for a double mains toilet, it’s recommended to consult with suppliers or rental companies that specialize in portable sanitation equipment. They can provide guidance on suitable tank options based on your specific requirements, such as the expected usage volume and duration. Additionally, they can offer information on maintenance and servicing requirements for the waste tank to ensure proper functionality and hygiene.