Sam Johnson
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My 6-year-old American Standard toilet with Flushmate appears to be the source of an increasingly-severe water hammer in the pipes behind the toilet. The water hammer has been present since the toiled was installed in our addition 6-1/2 years ago, but it was only occasional and mild until recently. Now it happens whenever the water is turned off at any of the other fixtures in the bathroom and will often occur when the water is turned on, as well. The reason I believe it is the Flushmate is that I can make the symptom disappear completely by shutting off the water supply to the toilet and then flushing it. The water hammer goes away immediately and does not re-occur. Do you know if this can be fixed by repairing/replacing the Flushmate? I would rather replace the toiled with a gravity-feed than tear into the walls to add an air chamber to the pipes. (Oddly enough, the twin sinks in the same bathroom already have air chambers installed, but the air hammer happens anyway.) Thanks for helping.