I'm trying to install a small undersink RO unit. Aqua Flo E75. In order to install the membrane in the housing you have to unscrew the end cap. However a short hose is connected to that end cap. You cant turn it more than one turn due to the hose. How to release the hose from the end cap co it can turn open? It's 1/4" push fit fittings...? (system is actually a Canature RO75 according to the package.) UGH