i have had my newest h-f parts washer for 4 yrs. and it still works good..my old one that i made myself i now keep at the house shop,in it i used a submergered pump i bought from h-f it has to be over 15yrs old and still works..maybe those having problems with the pumps are letting the fluid get too low or slime level get too high.. i use de-natured alcohol in my washers and always make sure the pumps are below the fluid level for cooling and clean them every few months or more if needed.... i tried the water based cleaners..for about a hour before i dumped it out..does make good hand cleaner though..ha ha ha ha