I can't comment on pumps, unless it's about breaking them.I suggest you maybe look into water jet pumps? You can use the water from the tap, wasting a lot of water OR hook it up to a recirc. bath with treated water and simple water pump (you can find powerful ones for cheap).It's pretty elegant, I think mister G has a thread, aswell as Chemplayer on bitchute.
BUT If you want to do this reaction small scale simply tossing your finished, basified, cooled RM into a big sep, along with some petether, toluene, xylene, hexane few shakes, few vents badabing badaboom, repeat 3 times, pool extractions over drying agent (MgSO4, NaSO4, BaSO4 [yes, it works] , NOT CaCl2 or anything with calcium, it will gel).One thing to watch out is you want to use about as much solvent as in the procedure (scaled ofc) if organic layer is too dillute it's not gonna precipitate as readily.