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TracTuff D15/D16 Fill Pot


It's not a swirl tank, it may look like one but its not, this is the little brother to the swirl fill, the fill pot. 

Water does not spin and the inlet/ out configuration does not do the same thing to separate air as the swirl pot, but the fill pot is more effective at trapping air then a simple filler neck. The fill pot is a bit easier to make and as a result, less expensive, so if you need a point to fill the cooling system and you want a little more flexibility with where the outlet points, as well as up and down... this is for you! 

You have the choice to move the outlet, change the connection type to suit your specific needs. All billet parts are CNC machined from US milled 6061 aluminum. 

NOTE: Made to Order - Contact for ETA - If you are interested in a specific design that varies from this, please email us at The cap bung has a 1/16" NPT port for connection to an overflow and uses early model Honda radiator caps; such as an 88'-91' Civic/ CRX or 90'-93' Integra. If you are using AN lines, I recommend designing the upper radiator hose so that there is droop/ give... so the engines movement and does not push/ pull on the radiator and fatigue any parts. The tank is welded so that it sits level when bolted to an engine with a 7° lean forward (exhaust side).