I'm thinking maybe of buying a spare as a back up for the day when mine packs up, however the ones i have seen going at a reasonable price seem to be rated at 1.4gals per minute whilst mine is 1.8gpm. Is 1.8gpm the highest output they do? I don't think i would be happy with any less flow than i have at the moment.
Another question - why are Flojet pumps so expensive when most people consider them to be inferior?