I am an engineer starting a film developing and processing lab in my house for personal use. I am currently using a bathroom, and am concerned about contaminating my chemical process and the bathroom using what seem to be accepted practices in developing labs.
Many developing chemicals (e.g. Kodak D-76) come in exact quantities to mix 1 gallon of stock solution. I will mostly be using quantities 500 mL or less, though certain chemicals will be larger arbitrary volumes.
What methods/equipment are used for transferring large volumes?