GLI 21' Round Boulder/RiverRock Overlap AG Liner 48"-52" Wall | 05-0021RD-BLD-OL-4852 Inflatable Pool Mattresses It enables the cleaner's characteristic

It enables the cleaner's characteristic oscillating suction action across the pool floor

Always confirm your existing grid dimensions before ordering to ensure compatibility

The label plate displays the valve's selector positions — such as Filter

Never use petroleum-based lubricants — they degrade rubber O-rings rapidly and will shorten the life of this seal

T-gasket seal on union valves

GLI 21' Round Boulder/RiverRock Overlap AG Liner 48"-52" Wall | 05-0021RD-BLD-OL-4852 Inflatable Pool Mattresses It enables the cleaner's characteristicSize: 21' Shape: Round Liner Type: Unibead Glis splash series boasts our versatile, patented unibead structure allows for the replacement of overlap or beaded liners with one of our beautiful tile patterns. To replace an overlap liner, simply attach the unibead j hook to the top of the pool wall. If replacing a beaded liner, just remove the j hook portion of the liner and install a standard beaded liner. Both options give offer a sleek, seamless