The DUCO safety fittings are manufactured by PenTec Snelrewaard BV. PenTec Snelrewaard BV is an ISO9001 certified company. DUCO's safety devices are manufactured and assembled in accordance with CE (no. 476) / Pressure Equipment Directive 97/23/EC modules B and D/ EN4126-1 / EN1491 / EN1488. In addition to a Declaration of Conformity each product group also has a Declaration of Performance certificate.