Mike, the 6-shooter A&A valves are effectively a cookie cutter of the Paramount ones. They have choice of 1.5” And 2” PVC female connectors so that would be the measurement you’d need to make. I replaced my A&A valve, and I’d be willing to bet the original valve was a Paramount one as that’s what I’m told was around when pool was built-making this the pool’s third valve assembly. I did use female-to-female couplings to build up and even out the pvc to keep the new valve level after cutting off the old valve. I understand the argument to abandon, but a cleaning option with literally no cords or tubes, IFCS is the only option. Beyond that, it’s such a fantastic way to heat up your pool most effectively. I love mine, and little need to manually vacuum, though the energy use and noise when VS is on high speed is a bugger.