I installed the American Standard dual flush 6/3 liter 4035 toilet
just over a year ago. Ever since day one it hammers when the bowl is
filled and it also sounds like another hammer when just after the
small flush button is released not the large flush? Is this a case of
design as no other toilets in the house makes such noise.
Ps American Standard won't return my email.
Different fill valves operate differently. You may have one that uses
the water pressure to help close the valve quickly. The ones that
slowly come to a stop won't cause the water hammer, but they too can
have their own problems.
Or that toilet is on a different branch of the water supply line.
Water hammer happens when the pipes bang against something, usually
the wall studs. If the other branches are tight there may be no
One thing that might help is to drain the system, hoping that any
hammer suppressors will also drain.
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