redearslider.com

Was wondering if I'd be able to use the top of the bigger pump for my smaller canister pump if the head unit is the same size first picture is the one I have the second one is the one I wanna replace the top with, because if I can buy just the top I won't have to spend 80$ on another canister

"IF" no they are not ! Don't assume because they look the same.

Pull up SunSun dimensions chart and you will see no were the same , totally different dimensions ! Just goggle.