Parker 700 install issue
When we first purchased our coach, I was told by Bernd it should be updated with a Parker 700 system. I did not question it at the time and didn't know enough to check the installation.
As the last part of my fuel system upgrade, I wanted to install a vacuum gauge to monitor my primary visually. When the fuel hose was pulled we found they had used the wrong fittings. They had used NPT on both sides of the filter.
The brass fittings in the picture are NPT and had been slathered in goop to prevent leaking. Once they had been opened those seals were broken. When they were opened was probably in a servicing. What we encountered was evidently a slow leak. The coach would stall in warm up and I would bleed it and we would be good. Started bleeding it every morning. Could not find the leak.
The fittings at the top of the picture are UNF 14 were used to replace the NPT that came out of the filter head. Then to adapters that were NPT to the hose. Note the UNFs have small gaskets. Fortunately the filter head was not ruined.
I don't know if this was a one off error or not but if you had one installed at Worldline and have those symptoms it might bear checking. Yet another part of the learning curve.