I was looking over my new Pentair Dynamo pump last night in preparation for the install today. I noticed something disturbing. Unlike my previous pump the part that holds the strainer (circled in blue below) screws onto the pump housing like two peices of NPT pipe going together. I've marked where it screws in with the red arrow. There's a rubber o-ring there to seal the junction.
On my previous pump the strainer part was affixed to the pump body with bolts.
What's troubling to me is that if I screw the strainer assembly on so that it ends up perfectly vertical the rubber o-ring inside is barely compressed and the joint doesn't feel snug enough. In my estimation the strainer body just isn't screwed on tight enough.
If I do screw the strainer body on tight enough (my opinion of tight enough) the strainer body ends up about 10 degrees off vertical.
I'm doing a rigid pvc install so I have to get this right from the start. Do I screw the strainer body on until it's perfectly vertical or do I screw it on until it feels snug enough?