We fill them at the training hall and bring them to the site. We dump them at the site when the trial is over. No one complains about us watering the lawn. The positive in using them for us is that sandbags take up a lot of floor space and the empty tunnel bags are stored in a container on a shelf.
Water bladder bag that fits inside Tunnel Bags has a screw cap - the perfect solution for saving weight, restoring leaky bags or easy winterizing.
• Simplify your spring/fall chores: just fill with water in the spring and empty in the fall for winter storage.
• Extend the life of your existing tunnel bags — use as a replacement leak-proof liner for older tunnel bags that are ripped and leaking sand.
• Save fuel and weight and transport empty bags to a trial and fill bags onsite.
5.28 gallon (20 litre) food-grade bladders fit our Thunder Competition and McWedge tunnel bags and most all tunnel bags. Just unscrew the top and fill with water to the desired weight and place in tunnel bag lengthwise. The bladder expands to fill the tunnel bag. Thunder Competition tunnel bags weight 28 lb (12.7kg) when filled with water; McWedge tunnel bags weigh 32lb (14.5 kg) or as heavy as one can carry when filled with sand or pea gravel. Completely collapsible, dump the water when storing or for transport. Measures 25” x 18.5” (645mm x 470mm) empty. For McWedge tunnel bags we recommend filling with a 1-1/4” (32mm) layer of pea gravel then lay a filled bladder on top. This spreads the weight over the entire bottom footprint of the bag and ensures the feet make contact with the turf. Tip: for winter use in northern regions, add 1 cup of rock salt. Note: Bladders are ultra tough, heavy duty, durable food storage bags and are warrantied against leaking upon receipt only. If a heavy weight is applied when filled (i.e. human foot) the seams could potentially split and the bladders leak.
We use them at our trials and they are wonderful. I like how the water gives if a dog should happen to hit a bag.