[Kevin Sevcik]

I'm interested in the fact that one of the fittings on the end has been split in two and the other is completely intact. The fitting is a pretty beefed up area that shouldn't be under a lot of stress from the pressure. I'm leaning towards someone overtightening the fitting on that end and starting a crack or creating a highly stressed area where a crack is likely to form. NPT threads are tapered, so it's pretty easy to crack a fitting by overtightening. I've seen guys at work crack brass fittings sometimes, after all.