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 10 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 Double tube design 10 ft. long No-leak valves For inground pools...