I have a rigid/in-ground backwash discharge piping attached directly to the valve on an older Pentair triton sand filter that previous owner installed (see pic). It’s convenient for backwash since there’s no hose to connect. Unfortunately the piping runs to yard in an area I need to re-grade & I’ll have to remove the pipe. How do I “restore” the backwash feature back to a “screw on hose” type? Thanks!