Description: DIY Pro Sump Pump Kit includes a 18" x 22" Structural Foam Basin with Gas Tight Cover, 1 1/2" Check Valve and Zoellar M-53 1/3HP Submersible Pump. Sump pumps are the heartbeat of any basement waterproofing project, therefore, a quality pump is your best choice. Cast iron housing is the industry standard -- they are heavy, durable and dissipate heat well.