As Bill suggested, nobody would make a conventional brush-type DC motor for a high-reliability pump, though there are some very small ones for, for example, marine bilge pumps. The way to do that is get an inverter duty rated 3-phase AC motor and an inverter
(which is what a "DC brushless motor" really is).
In fact, it's not uncommon in that power range to drive 3-phase motors from single-phase AC by using a derated VFD, if the point is to operate off of a single-phase supply. I've done this before quite successfully.