In case the "Non-Poms" er, sorry, I mean "Non-Brits", don't know, "VAT" is "Value Added Tax", not the first part of a famous whisky label. For international buyers, "VAT" doesn't apply, but as has been mentioned above, some import duty may be applied when the pipes hit your shores.
The biggest problem I have is that DSS use those thieving dogs at UPS to ship large consignments like pipes, and those ass-wipes are are shipping terrorists once outside the US, one of the Aussie forum members recently contacted me to say he'd ordered a set of new pipes from DSS, but the shipping and import duty was total bull-#$%*, and I don't know if he actually went thru with it. So near, and yet, so far...............