post #21 of 21
I just bought one of these Dial-O-Matic hand pumps (the one with the pistol grip) for about $35 bucks after seeing somebody post a picture of one they got for Christmas.

It has two needles - one bottom opening only, one multiple opening. You can adjust the amount of liquid injected per stroke very easily.

See the website for details and distributers. I couldn't find one locally, so I contacted their customer support. They responded promply and steered me to a place in Houston that carried them. Nice folks.