STSR is the Italian cartridge par excellence.
In fact all STSR cartridges, thermostatic cartridges, diverters and
head valves, are entirely manufactured, assembled and tested within
our plants and there are no other STSR factories outside Italy and,
specifically, outside the province of Milan.
By purchasing a STSR product you will then have the certainty of its
Italian origin, and to confirm it also the achieved important OQC
certification, Origin and Quality Controlled, sponsored by NSF, in order
to validate and confirm the only companies really producing in Italy,
through annual audits.
STSR has one quality, always and forever.
STSR do not have A or B products lines, but only items created to reflect
the product characteristics.
Each product is standard marked MADE IN ITALY or marked following
customer's requests.
Choosing STSR means quality, origin certainty, reliability, continuity and
a customer-supplier relationship that is not necessarily a simple sale
but a genuine cooperation in case of specific requirements.