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Set of Four Undercover Gravity Tubes with Quick Straps
- 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
Product Details
Undercover Part Number: UC-AGT eCanopy Item Number: UCC-UC-AGT UPC: 852232005021 Features
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Customer Questions & Answers
9 Questions &
34 Answers
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
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
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
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
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
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
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
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
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
Customer Reviews
4.9
22 Reviews
5
91% (20)
4
9% (2)
3
0% (0)
2
0% (0)
1
0% (0)
95% Recommend this product (21 of 22 responses)
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.
