We have 3 sizes: a 1.5” hose ramp for a garden-type hose, a 2” pipe ramp for a Schedule 40 pipe (2 ⅜” OD) that can also fit up to 3” OD pipe or hose, and a 4” ramp for up to a 4.5” OD pipe or hose (originally engineered for Yelomine™ and Aquamine® pipes).
