Hayward H400 - sounds like it’s full of rocks!

[JamesW]

Those specific unions are a really fine thread and they are horrible to try to reconnect.

 

[1poolman1]

Repaired and back in service. I found out why local pool service didn’t want this job. It was a PITA, right to the end. Even what I thought wouldn’t be a problem (reconnecting the supply and discharge unions) seemed to take forever. Just couldn’t get them to line up without cross threading. Thanks again for all your support.

While very strong, for some reason Hayward headers seem to change dimension in use and new union nuts just don't want to fit.