Pentair 1 1/2" NPT Plug with O-Ring

The Pentair 1 1/2" NPT Plug with O-Ring (part number 154697Z or 154712Z depending on the filter line variation) is a heavy-duty, threaded drain plug assembly designed to seal the main winterizing or auxiliary drain ports on various Pentair sand, cartridge, and D.E. pool and spa filtration systems. Injection-molded from a dense, high-impact, and chemical-resistant black polymer composite, this plug features standard 1.5-inch National Pipe Thread (NPT) male threading that spins securely into the lower tank body. It comes pre-equipped with a matching high-durability rubber O-ring to form an absolute airtight and watertight compression seal, preventing slow containment leaks and holding back intense hydraulic pressures during normal pump operation. Built to handle freezing winter climates, intense outdoor UV rays, and continuous exposure to corrosive pool chemicals without cracking or degradation, the plug is engineered with raised external ridges to provide service technicians with adequate manual leverage during seasonal maintenance. Due to its compact, all-plastic construction, this individual plug and O-ring assembly is exceptionally lightweight, carrying an actual product and shipping weight of approximately 0.10 pounds (about 1.6 ounces).