The water is coming out from where the basket housing and pump meet. There are no bubbles in the line either in the suction or pressure end of the system.
I thought it might be the seal assembly behind the impeller but I replaced the seal assembly and it's still leaking.
I have no idea why it's still leaking. It could be that I didn't put the pump back together properly or it could be something else.
Any help/input would be much appreciated.
What I did (Hayward Super Pump):
1. Took the impeller off.
2. Removed the old seal.
3. Installed the new seal.
4. Screwed the impeller back on.
5. Reattached the diffuser.
6. Reconnected the pump to the basket housing.