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Set of Four Undercover Gravity Tubes with Quick Straps

72.95
 List Price: $89.99
Sale Price: $72.95
You Save: $17.04 (19%)
In Stock.
* Usually Ships within 1-2 Business Days.
  • 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 inwinds of 15 mph or greater
(See Complete Product Description)
Product Details
Manufacturer: Undercover
Undercover Part Number: UC-AGT
eCanopy Item Number: UCC-UC-AGT

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 inwinds of 15 mph or greater
Product Description
Ask a Canopy Specialist:
Put gravity to work for you with Undercover Canopy's innovative Gravity Tube weightset. 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.

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 inwinds of 15 mph or greater
Manufacturer: Undercover
Undercover Part Number: UC-AGT
eCanopy Item Number: UCC-UC-AGT
Customer Questions & Answers
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

Customer Reviews
Set of Four Undercover Gravity Tubes with Quick Straps
$72.95
(12)
5 out of 5 Stars

Most Helpful Customer Reviews

Fast and effective to install , I never leave without them
By
Roger
from Castro Valley, California on
June 19, 2015
I would recommend this item to a friend.
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.
Pros:
I've tried barbell weights, cement, and other products and nothing compares to the simple foldaway bags !

Fantastic Canopy
By
Daniel Duval
from Houston, TXon
March 23, 2015
I would recommend this item to a friend.
Easy to fill and set up and works great in wind and rain to keep canopy stable.
Pros:
Easy set up
Cons:
none

Check sewing on straps
By
Jim
from New Orleans, LAon
March 9, 2015
I would recommend this item to a friend.
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..

Very useful!
By
Steven
from ORon
September 10, 2014
I would recommend this item to a friend.
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.

Multiple Uses
By
Steph
from Colorado Springs, COon
October 24, 2013
I would recommend this item to a friend.
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!

Quality Product
By
Suzanne
from Orlando, Flon
October 16, 2013
I would recommend this item to a friend.
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.
Pros:
Easy to use and attach.
Cons:
The top doesn't seal closed, so filling with water instead of rocks, could've spilled during transport.

The Bags are Very Durable
By
Shanda F. Nicely
from Knoxville, TNon
August 16, 2013
I would recommend this item to a friend.
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.
Pros:
It was as easy as fill and attach. You also can use water or sand as the filler.....whatever is available!
Cons:
Nothing

Tent Weights
By
David B
from Redmond, WAon
August 2, 2013
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.
Pros:
Great design. Easy to use. Easy to store and reuse.
Cons:
Nothing

Great Product
By
Devin
from Bedford, Pennsylvaniaon
April 7, 2013
I would recommend this item to a friend.
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.
Pros:
easy to fill, carry and setup
Cons:
nothing

Excellent Product
By
Bart X
from SF on
July 2, 2012
I would recommend this item to a friend.
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.
Pros:
Look Great Work ever Better Like the Tote Bag
Cons:
Instructions need improvement

So Far So Good
By
Tina
from Chicago ILon
June 24, 2012
I would recommend this item to a friend.
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.

Gravity Tubes Rock!
By
Richard
from Boulder, COon
June 1, 2012
I would recommend this item to a friend.
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.
Pros:
easy to fill, easy to carry.
Cons:
Well, 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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