I installed the new primer pump without loctite and there are no leaks.

There was one advantage with the old style pump. I could tell by pumping it which filter was plugged:

1. Handle pulls up hard and goes down easily, primary filter (in-line) filter plugged.

2. Handle pulls up easily and goes down hard, secondary filter plugged.

However, I do like the convenience of the new primer pump, no need to unscrew the handle.

P E H