Abstract: A coffee maker pump for conveying fluid from a well area to a container for coffee grounds is provided with a restricted outlet opening for controlling the delivery of such fluid to the grounds in said container, and a by-pass opening intermediate the ends of said pump for relieving back pressure therewithin produced by said restriction. The amount of water which is supplied to the coffee grounds by said pump may be controlled by changing the size of the outlet restriction, or the size of the by-pass opening, or both thereby changing the back pressure in the pump stem which directly effects the amount of water delivered by the outlet end to the grounds retained within the container.