yeh see what I mean we need a sticky on this, I knew the old wdp bottles were 3 years and they are as you say dual hse tanks.
and yes, should have said in my 1st post really Jon is a cool bloke, there is no need for this, it could have been sorted out via pm's as you can see theres alot of confusion with test dates and jon would have settled this amacably (sp?) when he discoverd his error