Reef Octopus Auto Waste Collector 4 Inch w/Shut Off With the OCTO WC100 4" Waste Collector you can put an end to smelly collections of skimmate while providing a safety net in the chance that your skimmer overflows Just plug your skimmer pump into the included Reef Octopus Protein Skimmer Delay Timer The Delay Timer will turn off the skimmer pump if the Collector is overflowing (the rising level will trip the float sensor). After power outages it will also delay turning on the pump for five minutes to allow the water levels to settlepreventing skimmer overflows. Requires 15/32" tubing. Drain tubing sold separately. Height: 18"; footprint: 6.5" x 6.5"; input height: 12.25"