I've got a Hayward EC-65 DE filter that has a broken pressure gauge. I bought a new gauge from the pool store but its got a 1/4" threaded copper connector and it looks like the old owner somehow rigged the current pressure gauge so its not standard.

The front of the filter has a pvc elbow attached to it so that the current gauge is somehow screwed into the top of a piece of pvc attached to the elbow. I tried unscrewing the gauge but I think it might be glued and I will have to cut the pvc and attach the new gauge.

Do they make a 1.5" pvc "nipple" that will allow a pressure gauge to be screwed in? I'm not really sure what im supposed to do here.