DEAR SAM: I live in an apartment complex with each building containing 20 units. When anyone turns on the water, the noise is deafening. The apartment management states that nothing can be done to eliminate the noise. It is true? Are there any corrective measures available? I sure hope so, since I'm tired of being wakened at 5 a.m. when some of the early risers take shower.

ANSWER: YOU SHOULD ADVISE THE MANAGEMENT THAT THE CAUSE OF THE NOISE IS "WATER-HAMMER," RESULTING FROM THE LACK OF EFFECTIVE AIR-CHAMBERS IN THE PLUMBING SYSTEM OR THEIR COMPLETE OMISSION.

YOU SHOULD FIRST CHECK WITH SOME OF YOUR LATE-SLEEPING NEIGHBORS WHETHER THEY, TOO, HAVE HEARD THE PLUMBING NOISES. A TELEPHONE CALL TO A FEW WILL GIVE YOU THE INFORMATION AND THEIR UNREPRESSED FEELINGS ABOUT TAKING SOME ACTION TO IMPROVE THE SITUATION.

SUBSEQUENTLY, THE NEIGHBORS COULD SIGN A PETITION AND SEND IT TO THE MANAGEMENT. YOU MIGHT ADD A P.S. that if no answer is received within one week, you will consult with the municipal building deapartment, plumbing division, whether the building code was correctly observed. It might be a matter of safety hazard to persons and property because possible flooding. Incidentally, insurance companies might be hesitant about covering such properties for water damage!