Thanks Everyone for all the response. This what i assumed all along I just wanted to be sure . Now I am sure. Great analogy with the tires Gibson I will have them measure the contact patch on the ground. Hurmanetar yes they are Zip Flanges
Steve
I am having an dispute with a plumber. They are installing water meters in buildings and the other day one of the fittings on an 8" line separated ( it was found the set screws on the flange were not tightened). The plumbers insisted there is only 50 pounds of force needed acing on the flange...