4 in. diameter tubes recommended for use with larger pools and/or heavy gauge solar blankets. Using a larger diameter will reduce sag.
Inground Solar Blanket Storage Systems- For off-season storage of Solar Blanket - Install wood screw hooks into fence, wall or even hang from garage or shed ceiling. Be sure to install hooks into solid wood posts or studs. Roll solar blanket onto the storage system and suspend from hooks using the enclosed storage straps.