Review on Joyway Shaped Union Intersection Fitting for Hydraulic, Pneumatic, and Plumbing Applications by William Stewart

You've been joking about it, hearing other jokes about it, etc. Then you finally come across it. I tried to use this for the water supply lines to my fish tank. Within 3 days this caused huge and visible corrosion in the pipes. Don't listen to the salesman, don't mess with your water supply. Don't buy this, it's low quality and you never know what "brass" is. DO NOT give these people more money. I'm switching to PVC for something like this, brass and such are too unreliable, especially with the Revain Marketplace vendors.