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    Set of Four Undercover Gravity Tubes with Quick Straps

    80.95
    In Stock.
    * Usually Ships Same Business Day.
     List Price: $99.99
    Sale Price: $80.95
    You Save: $19.04 (19%)
    In Stock.
    * Usually Ships Same Business Day.
    • Revolutionary gravity-reliant design
    • Allows you to add up to 175 lbs. of leveraged weight
    • Tubes can be filled with sand, dirt, rocks, or water
    • Suitable for use in hardpan, cement, soft dirt, sand, and asphalt applications
    • Set includes four tubes and tensioning straps
    • Please note: Always securely anchor all four legs; dismantle canopy in winds of 15 mph or greater
    • Two-year Manufacuterer's Warranty
    (See Complete Product Details)
    Product Details
    Ask a Canopy Specialist:
    Manufacturer: Undercover
    Undercover Part Number: UC-AGT
    eCanopy Item Number: UCC-UC-AGT
    UPC: 852232005021

    Features

    • Revolutionary gravity-reliant design
    • Allows you to add up to 175 lbs. of leveraged weight
    • Tubes can be filled with sand, dirt, rocks, or water
    • Suitable for use in hardpan, cement, soft dirt, sand, and asphalt applications
    • Set includes four tubes and tensioning straps
    • Please note: Always securely anchor all four legs; dismantle canopy in winds of 15 mph or greater
    • Two-year Manufacuterer's Warranty
    Put gravity to work for you with Undercover Canopy's innovative Gravity Tube weight set. The four tubes fill with sand, rocks, gravel, or other ballast and secure to each tent leg with tensioning straps. Whether you're displaying on hardpan, cement, asphalt, or even soft dirt or sand, the Gravity Tubes add a hefty 175 pounds of leveraged weight to keep your canopy in place. Setup takes just minutes.

    Customer Questions & Answers
    10 Questions & 35 Answers
    Ask a Question
    Rachel
    from AZ asked:
    August 10, 2018
    Can you suspend these when filled from the top of the tent frame versus them touching the ground?
    1 Answer
    These are actually meant to hang from the top and rest on the ground, so essentially they can be hung, but they do need to rest on the ground for stability.
    Sarah B.
    on August 10, 2018

    Answer
    Lester
    from FL asked:
    November 2, 2015
    I am considering purchasing the Caravan 10 x 10 Displayshade Canopy Value Package + 4 Sidewalls. Will these Undercover Gravity tubes with quick straps work with that product? Also, will it allow the walls to be used? If not, what is the best weight option available? I would prefer to use a refillable water weight.
    1 Answer
    Thank you for your inquiry. Undercover gravity weights will work with the Caravan frame, you would just need to make sure that you do not add weight for the frame to support, so make sure the weighted bags are resting on the surface. You can use any type of weight of your choice to fill the bags.
    Emily - eCanopy Product Specialist
    on November 3, 2015

    Answer
    Steve
    from White Lake, MI asked:
    July 7, 2015
    Are the tie down straps of these Undercover Gravity Tubes black or blue in color?
    12 Answers
    Per the manufacturer, the Gravity Weight Tubes straps are black.
    Emily - eCanopy Product Specialist
    on July 8, 2015
    Both tie down straps are and bags are black.
    Jim
    on July 8, 2015
    from New Orleans, LA
    The tie down straps are black and about 1 inch wide. I will be using my Gravity Tubes this weekend for the first time, so after that I can report how they work. I filled them with rocks inside of plastic Zipper Bags. With about 30 pounds of rock in each and the Tubes are only about 1/2 full.
    Mac
    on July 8, 2015
    from TX
    The straps are black.
    Tim
    on July 8, 2015
    from PA
    The straps are black.
    Andy
    on July 8, 2015
    from Redford, MI
    The straps are black.
    Mark
    on July 8, 2015
    from Northampton, MA
    I have these and they are great. The straps are black in color.
    Klaus
    on July 8, 2015
    from Kansas City, MO
    The straps are black.
    Paul
    on July 8, 2015
    from Cadillac, MI
    The bags and straps are black.
    Gary
    on July 8, 2015
    from Ironwood, MI
    The straps are black.
    Jerri
    on July 8, 2015
    from Ironwood, MI
    The tie down straps are black.
    Donna
    on July 9, 2015
    from FL
    The straps are black.
    Daniel
    on July 9, 2015
    from Albermale, NC

    Answer
    Kym
    from CA asked:
    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.
    7 Answers
    Yes, The Gravity-Tubs are made to fold and stow when not in use! They are flexible.
    Dawn H. - eCanopy Product Specialist
    on May 4, 2015
    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.
    Kathleen
    on May 6, 2015
    from Austin, TX
    The tubes are very flexible and can easily be folded up after use.
    James
    on May 6, 2015
    from New Orleans, LA
    The tube is flexible. The box they arrived in was nice and small, about the size of a shoe box. Hope this helps.
    Deanna
    on May 6, 2015
    from Banning, CA
    The tubes are flexible and if folded over three times from the top, as directed, water tight. I'd totally recommend them.
    Dale
    on May 6, 2015
    from TX
    The tubes are flexible and can be folded.
    Nancy
    on May 7, 2015
    from Highland, CA
    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
    Klaus
    on May 13, 2015
    from Kansas City

    Answer
    Susan
    from Oakland, CA asked:
    August 19, 2014
    Are these tubes waterproof?
    4 Answers
    Yes, they are waterproof. They are designed to be able to hold water as one of the options for weighing them down.
    Dawn H. - eCanopy Product Specialist
    on August 19, 2014
    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.
    Suzanne
    on August 19, 2014
    from Orlando, FL
    Yes, they are waterproof.
    Mab
    on August 19, 2014
    from US
    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.
    CJ
    on August 19, 2014
    from Surprise, AZ

    Answer
    Tom
    from Michigan asked:
    August 8, 2014
    What is length dimensions (height) of the bag and what is the length of the tension strap?
    1 Answer
    The height of the bag is 3.5 feet. The tension strap is 10 feet long.
    Dawn H. - eCanopy Product Specialist
    on August 8, 2014

    Answer
    Richard
    from Mountains asked:
    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?
    4 Answers
    The Gravity-Tubes use a quick release buckle that is black. The hook is a coated steel, not plastic. They are approximately 1" wide.
    Dawn H. - eCanopy Product Specialist
    on July 30, 2014
    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.
    Mab
    on July 30, 2014
    from OK
    The straps are about an inch wide. They use a ratchet system. The hooks are metal. I have found them very easy to use.
    Susan
    on July 30, 2014
    from New Mexico
    This are quick release buckle and good quality.
    Vishal
    on July 30, 2014
    from Florida

    Answer
    GABatGH
    from Mohnton, PA asked:
    May 17, 2014
    How many gallons of water to fill each Tube? How much does each Tube weigh when filled with water?
    2 Answers
    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.
    Collin C.
    on May 20, 2014
    I did not use water I used 1/4" crushed stone. I does not move in a 50MPH wind gust.
    Tim
    on June 3, 2014
    from Pennsylvania

    Answer
    Russ
    from Howey in the Hills FL asked:
    August 30, 2012
    Are the gravity tubes covered in black nylon? The manual makes them look like clear plastic.
    1 Answer
    Per the manufacturer, these gravity tubes are indeed black and they are are made of PVC plastic.
    Tyler M.
    on August 31, 2012

    Answer
    Michele
    from Augusta, GA asked:
    August 4, 2012
    Can these be filled with water? What is the size when flattened for packing?
    2 Answers
    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.
    Dawn H.
    on August 6, 2012
    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.
    Suzanne
    on June 7, 2014
    from Orlando, FL

    Answer
    Customer Reviews
    Write a Review
    Review Summary
    4.9
    26 Reviews
    5
    92% (24)
    4
    8% (2)
    3
    0% (0)
    2
    0% (0)
    1
    0% (0)
    96% Recommend this product (25 of 26 responses)
    By Eileen from Philadelphia on August 12, 2018
    I would recommend this item to a friend.
    Great product
    This is the second set we have for our canopy at the beach. They are so easy to use.
    By Alison A from Berkeley, CA. on July 15, 2018
    I would recommend this item to a friend.
    Weight without the weight
    Our new car is at capacity with all of my display items and we couldn't bring our usual weights, a friend recommended gravity tubes and they worked very well. Luckily the art fair I participated in, had access to a fire hydrant so filling up the gravity tubes with water was very easy. Of course, disposal at the end of the show was even easier. During breakdown of the event, there was a series of microbursts and some artists who had broken down had problems, we left our Gravity tubes up until the very last item was packed. They did their job, allowing us to travel lightweight and having sufficient weight for events along the way.
    ProsLightweight for travel- we don't want to overload our car, the Gravity tubes allow for sufficient weight at our destination while not adding in weight or bulk for the drive. These were very useful including the tie downs that come with it.
    By Angela from Hamburg, NY on June 28, 2018
    I would recommend this item to a friend.
    Love
    Love these, they worked out wonderfully. Very sturdy and easy to attach straps to hold in place.
    By NCLWMC from North East, PA on June 22, 2018
    I would recommend this item to a friend.
    Easy & a lot of vendors want them!
    I reviewed before I bought and I am extremely happy with my set!
    I had to give others the info so they too could buy a set.

    I only had put in 1 bag of sand in each and they were perfect. But I know I can put more in if I am expecting any weather.

    I would recommend over and over!
    ProsEasy to carry. Easy to attach (They come with straps) Look nice. Easy to put around my sides with NO issues. NO Complaints
    ConsNONE I had
    By Leslie from Las Cruces, NM on February 5, 2018
    I would recommend this item to a friend.
    They work
    I am happy with the way these work, unfortunately one of the bags has an opening in one of the seams.
    By Suzanne from Seymour, MO on October 17, 2017
    I would recommend this item to a friend.
    Easy to Attach and Secure Your Canopy
    I wasn't sure whether to order these (if it was really necessary), but I am so happy that I did.
    I filled them with sand and attached them to the canopy with ease. These are a great tool if you have to set up on concrete/black top! These kept the canopy in place during high wind gusts. Other vendors brought cinder blocks and asked how to get these.. I was happy to refer them to eCanopy!
    By Lisa from MS on August 31, 2017
    I would recommend this item to a friend.
    So Easy to Use
    We used water for the filler vice, having to haul sand/dirt; this was so easy to set up, use, and disassemble with the undercover canopy!
    By Bevel from CA on August 24, 2017
    I would recommend this item to a friend.
    Great Product
    I purchased the Gravity Tubes for our own canopy a couple of years ago and liked them so much that I purchased a set for my sister. They are very versatile and easy to transport. I just dump the water and refill when needed.
    By John from WI on August 24, 2017
    I would recommend this item to a friend.
    Fantastic Product
    It's compact, easy to use, and easy to store. We used water to fill our tubes and they worked great! It's a fantastic product. Love them! I liked them so much I ordered a second set as I have a substantial tent with more than four vertical uprights.
    By Renee from Ocean Park, WA on August 11, 2017
    I would recommend this item to a friend.
    Worth Every Penny
    I bought these weights after seeing them on a few other vendor's canopy. I have used the cumbersome concrete filled PVC tubes ( which crack and look ugly); I also bought another fill-with-sand weight from Amazon which, ripped again and again. I finally got these and they are the BEST. I see using these for several seasons as they are extremely well-constructed and heavy duty material. The straps securing them to the canopy are easily adjustable and the whole thing is easy to attach and load. I am using sand, but love the option of water as I've seen other vendors use in them.
    By John from NV on June 16, 2017
    I would recommend this item to a friend.
    Sand Bags
    Work well. Easy to use.
    By Donna from Knoxville on December 15, 2015
    I would recommend this item to a friend.
    Awesome!
    Used them first time, loved them! No sand to deal with, filled with water out of the tap, dumped the water when done and easy to handle. Lovin' em!
    By Donna from Knoxville, TN on December 2, 2015
    I would recommend this item to a friend.
    best weight bags out there!
    We have friends with little weights and we've had sand bags but these are the BEST! Compact and light for storage and when we want to use these we just pull them out and fill them with water (which we get from the campsite hookup) then when it's time to leave we just dump the water on the ground and put them back into their storage bag. So much nicer not to have heavy sand bags to haul around and sand leaking out all over.
    By David from Virginia on August 21, 2015
    I would recommend this item to a friend.
    Highly effective and simple to use
    I used it at the beach with lots of wind and the canopy held up great. This product has s very clever design, as it pulls down from the top of the canopy. Very solid product and very easy and light to transport.
    ProsDurable, light, effective, accommodates different materials as fillers
    ConsNone
    By Roger from Castro Valley, California on June 19, 2015
    I would recommend this item to a friend.
    Fast and effective to install , I never leave without them
    I do many antique shows in windy areas around California , these gravity tubes are a must have in my business ! You can put sand, water, or rocks inside them it just doesn't get easier than that! I love these gravity bags.
    ProsI've tried barbell weights, cement, and other products and nothing compares to the simple foldaway bags !
    By Daniel Duval from Houston, TX on March 23, 2015
    I would recommend this item to a friend.
    Fantastic Canopy
    Easy to fill and set up and works great in wind and rain to keep canopy stable.
    ProsEasy set up
    Consnone
    By Jim from New Orleans, LA on March 9, 2015
    I would recommend this item to a friend.
    Check sewing on straps
    Received one strap where hook was not sewn in place at factory. Called Undercover for replacement and still awaiting replacemnt strap delivery. Have cobblled it together in meantime. Other three straps work great and hold perfectly a 50 lb. bag of sand. By accident 10'x20' tent was caught in some 30 mph winds and did not even budge with straps in place..
    By Steven from OR on September 10, 2014
    I would recommend this item to a friend.
    Very useful!
    The Gravity Bags that I ordered work perfect for the Mayor's event. The Gravity Bags held down our 20 X 20 tent without giving into the wind. I have been using 50 gallon barrels with water in them for the past 6 years. I would suggest to anyone that wants to hold down their tent to invest in Gravity Bags.
    By Steph from Colorado Springs, CO on October 24, 2013
    I would recommend this item to a friend.
    Multiple Uses
    These are great for what they are created for, but secondly are great for adding extra weight in my car when the roads are bad!
    By Suzanne from Orlando, Fl on October 16, 2013
    I would recommend this item to a friend.
    Quality Product
    We filled these with a small amount of rocks the size of ping pong balls... approx enough to fill a milk gallon container each. It worked just fine when gusts of wind came. If it there was more wind, we would've needed more rocks, but for a mild day, this amount was fine.
    ProsEasy to use and attach.
    ConsThe top doesn't seal closed, so filling with water instead of rocks, could've spilled during transport.
    By Shanda F. Nicely from Knoxville, TN on August 16, 2013
    I would recommend this item to a friend.
    The Bags are Very Durable
    I used this product to hold down my tent at a recent outside retail event. The bags are very durable, nice looking and easy to install. I would recommend them to a potential buyer.
    ProsIt was as easy as fill and attach. You also can use water or sand as the filler.....whatever is available!
    ConsNothing
    By David B from Redmond, WA on August 2, 2013
    Tent Weights
    With an event pending and many tents up wind starting to show signs of getting stronger for the upcoming weekend we purchased some sets of these tubs so we did not need to use old school sand tubs to help our existing weights hold our tents down. They were great, we filled them with water so we could store them easily after our event. We did try to dry the insides out so that we do not have mildew issues next time but it looks to be a great freight with a waterproof interior and clean fabric exterior. Not cheap but great product and if this I what you are looking fir you will be happy with choosing this.
    ProsGreat design. Easy to use. Easy to store and reuse.
    ConsNothing
    By Devin from Bedford, Pennsylvania on April 7, 2013
    I would recommend this item to a friend.
    Great Product
    Nothing even comes close to these things. They keep the tent stable and secure even in gusts over 30 miles an hour. I've tried buckets of sand, cement blocks and concrete weights and none of these worked near as well as the gravity tubes.
    Proseasy to fill, carry and setup
    Consnothing
    By Bart X from SF on July 2, 2012
    I would recommend this item to a friend.
    Excellent Product
    These weights were commercial grade. They worked even in 30 miles an hour wind which was surprising. Definitely recommend." So much more efficient than standard sand bags, straps secure frame amazingly well.
    ProsLook Great Work ever Better Like the Tote Bag
    ConsInstructions need improvement
    By Tina from Chicago IL on June 24, 2012
    I would recommend this item to a friend.
    So Far So Good
    I have only set these up 2 times. So far I am very happy with the ease to fill them and transport them by myself. Quality seems good.
    By Richard from Boulder, CO on June 1, 2012
    I would recommend this item to a friend.
    Gravity Tubes Rock!
    Vendor fairs are usually on asphalt so it is not possible to stake down the Canopy. Most fairs require weighted corners to keep the tent from lift off in gusty, windy days. The gravity tubes are ideal for anchoring the legs of the canopy. I've used 5 gal. buckets of sand, cement tubes and barbells - all not easy to manage. the gravity tubes can work with sand, rock, even water to add weight to the tent.
    Proseasy to fill, easy to carry.
    ConsWell, i first filled them with mountain granite - which is not a smooth rock. it started to cut the bags. I'd recommend round rock or gravel to protect the tube. Also it did not come with directions on how the straps work. None of the ladies could figure them out.
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