I recently replaced an ancient electric water
pump with a whale baby gusher, dome-type water
pump instead of the whale gusher double-action lever type. I did so because I was unsure about mounting options and well... I'm cheap. The dome-type is okay, and I might use it for a a while ... because well, I'm cheap, but I really do regret not getting the double action lever one. I have used both, and waiting for the rubber dome to re-prime after each pump is a pain the ass.