the vac we use is used for a multitude of sins
gutter vacuuming std and also when we are roof cleaning - saves disconnecting downpipes simply block pipes and vac.
Hence m/c needs to pump out water (submersible) only a few proper bits of kit on market expensive unless you make ur own. if uve got the time fine!
we have big numatic 1800 series prob is pump is right at btm of drum keeps getting blocked via debris!