Looking for a "Groover"? Purchase a complete system here with a choice of 2 different seats. Both come with a clean out system. The Hex bolt unscrews from the 6" lid and the Garden Hose Adapter screws to the lid to add fresh water while the RV style Dump hose is connected and inserted into an approved RV dump location. Solgear recommends a 20mm Rocket Box to house the tank and another one to house the seat and supplies. Additionally, we encourage users to purchase a spare 6" lid as a dedicated clean-out lid. This will reduce the risk of stripping the plastic threads over time.