I have one of those auxilary spray hose thingies on my sink. It began
to leak. When the leak started, so did the water hammer phenomena.
Hot, cold, lo/hi flow, whenever I turned on the main faucet, I'd get
water hammering. Finally replaced the leaky spray nozzle so the
sprayer no longer leaked. The water hammering ceased, also. Can
anyone explain what was happening? TIA