Racor Drain Plug Kit RK 50199 | eBay Find best value and selection for your Racor Drain Plug Kit RK 50199 search on eBay. World's leading marketplace. Racor Self Venting Drain Plug RK30488 - Star Marine Depot This item is a replacement drain valve for the Racor turbine series fuel filter. This covers all the 500 series, 900 series and 1000 series filters that use a replaceable drain valve. This kit includes all the gaskets and seals to quickly and easily change over and replace your valve.