Ken Lim
Ken…Sounds like you have a loose washer in the supply stop to the offending basin tap.some times this can be dealt with by simply opening the stop all the way (the stop is located under the vanity or cabinet, and has a tube running up to the tap.) If opening it all the way up doesnt silence the machine gun noises, replace the washer and bibb screw. Lots of luck..Bud… Suncoast Plumbing Inc. Sunny Florida.: What could be causing a very loud thumping noise when : turning on the taps on a hand basin? This problem does : not happen with any other taps in the house.
