Our catalogue Zbigniew Szydlik’s Sanitary Installations and General Construction Company (pl. Zakład Instalacji Sanitarnych i Robót Ogólnobudowlanych Sp. z o.o. – ZISiRO) was founded in September 1995 in Dąbrowa Górnicza. Since then, we have been constructing and providing: water and sewage systems installation, low-, medium-, and higher-medium pressure gas networks, second degree gas pressure stations, gas pressure reduction/metering points, boiler houses, heating installations and heat distribution systems.

In July 2010, we obtained a Quality Management Certificate PN-EN ISO 9001:2009, issued by the Office of Technical Inspection CERT (pl. UDT CERT).

In August 2011, we obtained a Quality Management Welding Certificate PN-EN ISO 3834-2:2007.