Review on Cobra Products 333 Drain Cobra Large Bladder: Unleash Powerful Clearing in your Pipes! by Steve Beaumont

a little later Might appear to be defective? After a 30-minute attempt to clear the gutter of leaves and pollen, it got stuck in the drainpipe. I used a 3 foot piece of 4 inch PVC test pipe to see what was really going on. Only a tiny jet was emitted! I should have bought Drain King but I saw high reviews for less money. Bought a Drain King and BAM! (made in the USA) It blew out the blockage in just minutes with its pulsing/vibrating power. Return of the Cobra. Note: I have previously used the (neighbor recommended) smaller Drain King (which I still have) to clean my kitchen drain pipe and was impressed by how quick and easy it was.