On Mon, 22 Sep 2003 13:23:50 +0000 (UTC), wrote:

My water feed is from a tank, and no pressure reducer is fitted.

Try the lower of the two supplied restrictors marked "LP" IIRC. The
bang is symptom of the valve shutting off too fast which it will do
with a high flow rate. You have to strike a balance between a reduced
flow rate and the bang.

--
Cheers
Dave. pam is missing e-mail