Just an idea if you are wanting this for an emergency, Lehmans www.lehmans.com has a device that you tie to a rope and lower into the well, it fills with water and then a valve closes and you can pull it out. Holds 4 gallons I think. That would work fo emergency water and is inexpensive. You need to be VERY careful not to contaminate your well though, once you've got something down there there isn't any way to get it out.