SitaRetention Twist with dome grate, made of polyamide (base plate) and PE (ventilation pipe and rain cover), with scaled adjusting slide made of stainless steel for the controlled discharge of rainwater, for installation in roof outlets of the SitaStandard, SitaIndra or SitaTrendy series. The ventilation pipe can be individually shortened on site, including sealing rings made of EPDM, supply and install to professional standards.
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