i made a home made tig torch cooler about a year ago and it has been working fine except it goes through pumps. ive put in 3 used fuel pumps so far. i know fuel pumps are not rated for water/coolant i know but my intentions was to get it going and see how it worked and when i ran out of pumps find one rated for the job. ive searched and can only find pumps that cost 300 bucks or pumps that would take a complete redo of my setup. so im looking for a submersible pump that can do 50psi max and either be 12vdc or 120vac. lemme hear your suggestions.