Vaillant hi output boiler training PH Plumbing 01/08/2017 Uncategorized big thanks to the vaillant training center in Leeds for looking after us so well during the high output boiler training You Might Also Like Up to 8 years free warranty on new vaillant boilers 12/05/2016 bathroom renovation by chris 13/06/2018 PH Plumbing Complaints Policy 22/07/2016