PoolStyle Silver/Black 30 x 50 Foot Winter Pool Cover pool-dimensions_10x10 The ball check valve spring

The ball check valve spring is stainless steel with an EPDM seat and Santoprene o-ring making it ANSI/NSF STD 61 and 372 compliant

For concrete-walled vinyl liner pools

This o-ring is designed to replace the Swimquip Vacuum Lid O-Ring

This pool depth marker states BENCH BELOW and has an overall size of 9 x 6 inches

PoolStyle Silver/Black 30 x 50 Foot Winter Pool Cover pool-dimensions_10x10 The ball check valve springBuilt for durability, the PoolStyle 50 x 50 foot silver black aboveground pool winter cover combines triple laminated polyethylene construction with heat sealed seams for superior strength. The cover is reinforced with commercial grade stitching, sewn in polypropylene cord, and strengthened edges that stand up to the harshest winter weather. The cover material is enhanced with heavy duty UV inhibitors for long lasting protection. The silver and black