18 foot Double Drop with Slip and Slide, Commercial Inflatable Water Slide - WS4120-SS

18 foot Double Drop with Slip and Slide, Commercial Inflatable Water Slide - WS4120-SS from Happy Jump is a dual lane water slide that takes up 43 by 13 feet of ground and stands 18 feet tall. That footprint of 559 square feet is bigger than 43 percent of the 602 dual lane water slides here with printed sizes. Happy Jump prints the ages as “Min. height requirement 36"”.

Specs As Printed

Maker	Happy Jump
Type	Dual Lane Water Slide
Length	43 ft
Width	13 ft
Height	18 ft
Footprint	559 sq ft
Size as printed	Unit Length: 43 ft; Unit Width: 13 ft; Unit Height: 18 ft
Weight	550 lbs
Blowers	2 x 1 HP
Ages	Min. height requirement 36"
Wet Or Dry	Wet
Made For	Commercial rental use
Maker List Price	$4,797 on November 12, 2026
Item Number	WS4120-SS

Source Happy Jump product page, checked November 12, 2026. Makers change specs, so confirm before you buy or rent.

How Much Room It Needs

The unit itself covers 43 by 13 feet. Rental companies also leave open space around every side for stakes, the blower tube and a safe exit, so measure your yard larger than the footprint. Check the maker sheet for the exact clearance it asks for.

Solid shape is this unit at 43 by 13 feet. Dashed shape is the middle size for its type, 34 by 19 feet. The bar is a 6 foot adult.

Similar Size From Other Makers

Unit	Maker	Footprint	Height	Ages
Soccer Bouncer Combo Double Lane Wet/Dry	Leisure Activities USA	28 ft by 20 ft	14 ft	Not printed
Shark Mouth Fighter Plane Double Lane Combo Wet/Dry-SL	Leisure Activities USA	31 ft by 18 ft	14 ft	Not printed
20ft Hydro Summit Challenge Rock Climb Water Slide	BounceWave Inflatable Sales	37 ft by 15 ft	20 ft	Not printed
Wacky (22’) Dual Wet/Dry Slide	Cutting Edge Creations	39 ft by 14 ft	22 ft	Patron Height: 36 in
Ocean Quest™ (29’) Dual Slide	Cutting Edge Creations	39 ft by 14 ft	29 ft	Patron Height: 42 in
Dual Surf & Slide	Cutting Edge Creations	34 ft by 16 ft	9 ft	Patron Height: 36 in

More Dual Lane Water Slides From Happy Jump

Unit	Footprint	Height	Ages
Beach Breaker 18' Double Lane, Commercial Inflatable Water slide WS4215	33 ft by 12 ft	18 ft	Min. height requirement 36"
Island Wave 18' Double Lane, Commercial Inflatable Water slide WS4214	142 ft by 33 ft	18 ft	Min. height requirement 36"
Blue Malibu 18' Double Lane Water Slide WS4185-B, Commercial inflatable Water Slide	31 ft by 14 ft	18 ft	Min. height requirement 36"
22' Patriotic Inflatable Double Lane Water Slide [Inflatable Water Slides for Sale] WS4157	42 ft by 24 ft	22 ft	Min. height requirement 36"
18 Foot Double Drop Wet Dry Marble Slide, Inflatable Water Slide - WS4122-1MBG	27 ft by 13 ft	18 ft	Min. height requirement 36"
Hawaiian Double Lane Slip Slide with Pool, Commercial Inflatable Water Slide - WS4313-R	40 ft by 10.5 ft	9 ft	Min. height requirement 36"