SitaCompact retaining element, made of polyamide, for emergency drainage in accordance with DIN EN 1253-2, for SitaCompact balcony outlets, retaining heights from 22 mm to 115 mm, and SitaCompact screw-on flange balcony outlets, retaining heights from 37 mm to 115 mm, infinitely adjustable, can be shortened on site, with multi-lip angle sealing ring to seal the retaining element to the roof outlet, supply and install to professional standards.