SitaRetention Twist without dome grate, made of polyamide (base plate) and PE (ventilation pipe), with scaled adjusting slide made of stainless steel for the controlled discharge of rainwater on green roofs, 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, for installation with the SitaRetention green roof shaft, supply and install to professional standards.
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