1. It's from the bottom compression fitting. Forgot to try ptfe so will do that.
2. It's a Honeywell 3 port. Flow from boiler goes to right (marked A), top inlet for hwc coil goes to left (marked B) and bottom cones from pump with a tee in it for bypass valve.
2. It's a Honeywell 3 port. Flow from boiler goes to right (marked A), top inlet for hwc coil goes to left (marked B) and bottom cones from pump with a tee in it for bypass valve.