Swimline Standard Water tubes are filled with water and will prevent the pool cover from sinking into the swimming pool. Only fill water tubes halfway to prevent splitting when water freezes. Standard thickness Double tube design 8 ft. long No-leak valves For inground pools...

Swimline Standard Water tubes are filled with water and will prevent the pool cover from sinking into the swimming pool. Only fill water tubes halfway to prevent splitting when water freezes. Standard thickness Single tube design 8 ft. long No-leak valves For inground pools...