My inground gunnite pool is about 45 years old. One of my black poly return lines just sprung a leak. Luckily, the patio around the pool consists of street pavers set in sand so getting to the point of the leak was relatively easy. The leak is a small slit just before a stainless clamp that connects to the return wall fitting. The fitting is probably bronze and was made by Landon. I just got done replacing all the tile, patching many plaster and gunnite flaws, and painting the pool with epoxy paint so I am really not looking for another major repair. I am looking for suggestions for the easiest way to repair this. Right now all I can think is to cut the poly pipe far enough back to fit a barbed fitting to a new piece of poly pipe clamped to the pool wall fitting at one end and the new barbed coupling at the other. I am not sure how flexible the pipe will be to work a patched section in. I have a heat gun but melting plastic concerns me. Thanks for any suggestions.