Ah, thank you Ben ! Actually I was thinking more of the kind that's permanently fitted to the floor planking or so, i.e between the paddler's legs, and operates with a lever, like car gears. I reckon their capacity's smaller but they're easier to operate inside a yak.

Eric

: I built this one and have used it for 2 years, happy with the results, and
: couldn't beat the price $3.00 or so.

: http://www.geocities.com/shawnkayak/pvcpump/

: Ben S.