Water Slide & Dunk Tank Rentals in St. Louis, MO

Choosing the Right Water Slide for Your Event

Not sure which size to pick? Here's a quick guide. Our 13ft–15ft single-lane slides are perfect for smaller backyards and younger kids — great for birthday parties with toddlers and early elementary-age guests. The 18ft–22ft range is our most popular for backyard birthday parties, church picnics, and neighborhood block parties — big enough to thrill older kids and teens without needing a massive footprint. Dual-lane slides in this range let two riders go at once, which keeps lines short and energy high. Our 27ft and 35ft slides are built for large-scale events — school field days, corporate picnics, community festivals, and fundraisers where you need a real wow factor. These require a larger setup area, so measure your space or call us, and we'll help you figure out what fits.

Dunk Tanks & Wet Party Add-Ons

Our dunk tank is a crowd favorite for school carnivals, church fundraisers, and company picnics — nothing gets a crowd going like dunking the boss or the principal. Dunkees must be 18+ and under 250lbs. The tank dimensions are 4ft x 4ft x 8.25ft and require a level surface. You provide the garden hose and allow about 45–60 minutes for filling. We also carry wet obstacle courses and dual-lane slip-n-slides if you want to build out a full water day.

What's Included With Every Water Slide Rental

Every rental from Jolly Jumps includes professional delivery, setup, and teardown — you don't touch a thing. Our crew securely anchors each inflatable and walks you through usage and safety guidelines before we leave. All water slides are cleaned and sanitized between rentals. Standard rental is four hours with the option to extend by the hour. We deliver throughout St. Louis, Fenton, Chesterfield, Wildwood, Kirkwood, O'Fallon, St. Charles, and surrounding areas. Travel fees may apply to some locations. Reserve online anytime or call us at (314) 231-5867.