Waterless inline floor drain trap seal, SureSeal waterless in-line floor drain trap easily press fits into any standard drain to seal it and allow proper drain flow while blocking out odor and bugs. Simple to install, and can be easily retrofitted to older floor drains, as its variety of designs ensure compatibility with all other drain types. Great for industrial and home improvement. Stops floor drains from ordors and bugs. Included patented air relief valve and fits both cast iron and plastic floor drains. SureSeal waterless inline drain trap seal. 3.5" press in floor drain trap seal. economical and saves water, stops odor and bugs, and no trap primer needed. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.