The Hayward Strainer Cover O-Ring (SPX3000S) is the OEM replacement sealing O-ring for Hayward pool pump strainer covers, maintaining a watertight seal between the strainer cover and pump body. IMPORTANT: LUBRICATION REQUIRED — SOLD SEPARATELYAlways lubricate this O-ring with a silicone-based lubricant before installation. Browse our Pool Plumbing Lubricants for a compatible silicone lubricant. This O-ring seats at the interface between the pump strainer cover and the pump body, creating the pressure-tight seal that keeps the pump primed and prevents air from entering the suction side of the system. Replacing a worn, cracked, or flattened O-ring restores the seal and eliminates air leaks at the strainer cover joint. Specifications Hayward Part Number SPX3000S Part Type Strainer Cover O-Ring UPC 610377041232 Poolaroo Pro Tip Before installing this O-ring, clean the O-ring groove on the pump body thoroughly — debris or residue from the old O-ring can prevent a proper seat and cause air leaks even with a new part. Always apply a silicone-based lubricant (never petroleum jelly) to the O-ring prior to installation to ease seating and extend the seal's service life. Browse Pool Plumbing Lubricants for a compatible option. Inspect and replace this O-ring at the start of each pool season or any time the strainer cover is removed for service.