I was having the same problem getting the larger OD flex pipe to bend properly. What I did was fill the bathtub with as hot of water as I could and let the pipe sit in it for 1/2 and hour. After that it was a great deal easier to bend.
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- Greg
90G : Light - Tek 6xT5 | Skim - EuroReef RS135 | Flow - 2xVortech MP40W | Control - Reef Keeper 2
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