The PolyJohn 300-gallon holding tank is a necessity as a sanitary receptacle for waste for an outdoor rest area where indoor plumbing is not an option. Our functional and discrete holding tanks reassure workers or guests that waste is being stored safely and properly. They are also a convenient addition for a mobile office trailer, or a long term RV where dumping into a septic or sewer system is not available.

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PolyJohn holding tanks are made of an extremely durable plastic, and easily work with different plumbing configurations to ensure that your rest area remains as clean and uncluttered as possible.

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The 300-gallon capacity allows for maximum waste storage. "Natural" color provides some visibility for how full the tank is. There are several 3" fittings in different locations to allow for versatility, and easily accepts Fernco® flexible rubber couplings.