By Michele from Augusta, GA on August 4, 2012
Can these be filled with water? What is the size when flattened for packing?
By Dawn H. on August 6, 2012
Answer:Yes, they can be filled with water. I do not have the information on the size. All four tubes and attaching straps fit into a mesh tote bag 14"x20"x4" when storing.
By Suzanne from Orlando, FL on June 7, 2014
Answer:Use rocks, pepples or sand instead if you don't have access to a hose. The water can be messy if it spills; the top didn't seal it completely closed for me. Great quality, though... I highly recommend these.
By Russ from Howey in the Hills FL on August 30, 2012
Are the gravity tubes covered in black nylon? The manual makes them look like clear plastic.
By Tyler M. on August 31, 2012
Answer:Per the manufacturer, these gravity tubes are indeed black and they are are made of PVC plastic.
By GABatGH from Mohnton, PA on May 17, 2014
How many gallons of water to fill each Tube?
How much does each Tube weigh when filled with water?
By Collin C. on May 20, 2014
Answer:Per the manufacturer, it is recommended to add a maximum of 7 gallons of water per gravity tube. This puts the total weight of each tube at approximately 58 pounds.
By Tim from Pennsylvania on June 3, 2014
Answer:I did not use water I used 1/4" crushed stone.
I does not move in a 50MPH wind gust.
By Tom from Michigan on August 8, 2014
What is length dimensions (height) of the bag and what is the length of the tension strap?
By Dawn H. - eCanopy Product Specialist on August 8, 2014
Answer:The height of the bag is 3.5 feet. The tension strap is 10 feet long.
By Richard from Mountains on July 30, 2014
Please describe the tie-downs: What are the strap widths? Are these a "ratchet type" tie-down or a "quick release cam-buckle"? See images if needed. What is the color of the strapping? Are the hooks plastic covered?
By Dawn H. - eCanopy Product Specialist on July 30, 2014
Answer:The Gravity-Tubes use a quick release buckle that is black. The hook is a coated steel, not plastic. They are approximately 1" wide.
By Mab from OK on July 30, 2014
Answer:am at work so will guess at strap width of one inch. quick release. color is black. hooks are plastic covered. personal thoughts, if I knew these were available I would have bought them a long time ago. I filled mine with pool water and they work great.
By Susan from New Mexico on July 30, 2014
Answer:The straps are about an inch wide. They use a ratchet system. The hooks are metal. I have found them very easy to use.
By Vishal from Florida on July 30, 2014
Answer:This are quick release buckle and good quality.
By Susan from Oakland, CA on August 19, 2014
Are these tubes waterproof?
By Dawn H. - eCanopy Product Specialist on August 19, 2014
Answer:Yes, they are waterproof. They are designed to be able to hold water as one of the options for weighing them down.
By Suzanne from Orlando, FL on August 19, 2014
Answer:The directions say you can fill them with water. In a test trial I did so and they did not leak, but the top just scrunches closed so if you were to tip over a bag, the water could leak from the top.
By Mab from US on August 19, 2014
Answer:Yes, they are waterproof.
By CJ from Surprise, AZ on August 19, 2014
Answer:Yes. I filled them with water at each event and used them on the tent corners to anchor the tent. At the end of the event I dumped them on a thirsty tree or bush. I think they are great.
By Kym from CA on May 2, 2015
Are these UnderCover Gravity Tubes hard or flexible? I am using plastic buckets now and would rather have something that folds up after use to save space.
By Dawn H. - eCanopy Product Specialist on May 4, 2015
Answer:Yes, The Gravity-Tubs are made to fold and stow when not in use! They are flexible.
By Kathleen from Austin, TX on May 6, 2015
Answer:The material is flexible. It's a heavy plastic that can roll up the contents and clip together at the top. I am very pleased with this product and use them to weight down my tent.
By James from New Orleans, LA on May 6, 2015
Answer:The tubes are very flexible and can easily be folded up after use.
By Deanna from Banning, CA on May 6, 2015
Answer:The tube is flexible. The box they arrived in was nice and small, about the size of a shoe box. Hope this helps.
By Dale from TX on May 6, 2015
Answer:The tubes are flexible and if folded over three times from the top, as directed, water tight. I'd totally recommend them.
By Nancy from Highland, CA on May 7, 2015
Answer:The tubes are flexible and can be folded.
By Klaus from Kansas City on May 13, 2015
Answer:These are flexible, but very robust. Absolute winners, no matter what.... as it says, they are tubes, made of some really heavy duty nylon or other plastic material, sturdy and can be filled with a lot of different materials, including water.
I am not so sure about emptying them every time and folding them up, but when they arrived they where folded into a neat little 12in stack and even come with a little storage bag.
I managed to get just regular 50 pound play sand bags at the hardware store and maneuver them into the gravity tubes. I can see filling these with dry or wet material. If you have work out weights like dumbbells or flat disks, you can stack those into the tubes and wouldn't have to worry about lugging them around in these bags.
I can assure you that these gravity tubes will beat your buckets hands down.
hope this helped a bit