ISO and Marks

WISA is certified based on NEN and ISO-9001:2000. This international quality mark underlines the complete control over the continuing improvement process of our entire organisation. And the periodical check-up by the renowned institute KIWA guarantees this quality level in the future.

ISO
10 jaar
25 jaar
400 KG
KIWA
KOMO
CE
DIN
DVGW
GS
NF
UPC
Belgaqua
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