WTM operates according to ISO9001 quality system and ISO14000 evironment system, meanwhile, it manufacturers and exports directly wide range of ball valves approved by CE, WRAS and ACS, press fittings approved by DVGW and AENOR for 8,000 hours hot/cold water test, pex fittings in European standard and American standard approved by AB1953, NSF and cUPC, multi-layer pipe fittings, manifolds, radiator valves, bibcocks and many other valves. Besides, WTM is covered by Product Liability Insurance for its products warranty to ensure customers safty and reliability.