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| 01 August 2010 | |
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®
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 A commitment to quality is at the heart of the John Guest philosophy. The whole production process from initial tool design and tool making to final product assembly and testing is carefully controlled to ensure only products of the highest quality leave our site. The company quality system has been registered as meeting the requirements of ISO9001 since 1989 and we are preferred suppliers to many leading international companies. Products are approved depending on the intended use. John Guest Many parts have WRAS (Water Regulations Advisory Scheme) approval in the United Kingdom and NSF (National Sanitation Federation) approval in the United States for potable water and beverage use. Other approvals include SK Zert for beer and beverage use in Germany.
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fittings and pipe have been awarded the BSI (British Standards Institute)
Kitemark and BBA (British Board of Agrément) approval for domestic
plumbing use in the United Kingdom and by KIWA for central heating use
in The Netherlands.
