Nash knows that our customers require a sturdy and reliable sump basin cover, and that is exactly what you have with the Superior Pump Basin Lids. These crock covers are made of injection molded polyethylene structural foam and match the strength and quality found in the Superior Sump Pump Basins. These lids are available in two sizes to fit either the 15 or 20 gallon openings. Each basin cover comes with several fittings that increase the versatility of plumbing and cords in the basin while sealing everything off to prevent odors, gas and radon from leaking. We are confident that Superior Sump Basin Lids are the perfect choice for basement and crawl space waterproofing contractors.