"Alec" wrote in message
...

What I have seen being done is to add a vertical stub in the pipework that
traps air in it to provide a "shock-absorbing" function !!
Might be worth a shot for a half hours work.

Dedicated shock arrestors are available. Http://www.BES.ltd.uk Not
expensive. Just fit it on the offending pipework as close to the Torbeck as
possible.



---
--

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.520 / Virus Database: 318 - Release Date: 18/09/2003