The NEW DuraMax Jr HT commercial pool cleaner is designed with agility, reliability and safety in mind. DuraMax Jr HT is compatible with Virginia-Graeme Baker (VGB ANSI) main drain covers. DuraMax Jr HT provides full pool coverage, INCLUDING WALLS. It gobbles up algae, dirt and even large debris from the pool surfaces and vacuums everything into its built-in, easy-to-clean, reusable micro-filter bag. We recommend this model for pools up to 50' long.