pumphouse

noun3

1. •
   A building containing pumping equipment.

   • On many farms the early milkhouse and pumphouse were one. Most farmers during the latter part of the nineteenth and beginning of the twentieth centuries with a herd of milk cows had a milkhouse. — 1972
2. •
   A building containing pumping equipment to fill a canal.
3. •
   A building containing pumping equipment to provide the water supply on a farm (from a well, spring, creek, or pond).