Whether you need to remove water from sprinklers and valve boxes or other areas or devices, UltraMax Series Pumps are the ideal tools for the job‚Ä¶huge capacities and the smoothest pumps you will ever use as well. Unique replacement plunger seal and O-ring wiper seal assemblies for extra-long pump life. They are self-priming, and have a high volume water capacity. They offer a super smooth and durable pumping action. Also, they allow for completely disassemble for cleaning which allows for longer life and usage. Pumps have a contoured, super-grip ergonomic handle. They have a polycarbonate cylinder body and a strong aluminum pump shaft. The Gulp™ Ultramax 21" Pump with 18" Hose dispenses 8 gallons per minute and is 21" tall.