Schluter® KERDI-DRAIN 6" SQUARE CLEANOUT COVERThe 6" Square Cleanout Cover is a larger format grate option for KERDI DRAIN that works with 6" (150mm) square drain frames rather than the standard 4" round assembly. It's the right choice when your design calls for a more substantial drain presence or when water volume demands a larger surface opening for faster drainage. The square format creates a different aesthetic from the round 4" drain particularly effective in large format tile showers where