Tyler specifies the torque that should be placed on the screws. Torque refers to how tight the screws should be. If too little torque is placed on the screws, the fitting will leak. If the screws are torqued too tight, the fitting will bend and start to leak. For fittings made for pipes from 1-1/2 to 10 inches in diameter, the torque should be 60 inch-pounds on the screws. For pipes 12 to 15 inches in diameter, the torque should be 80 inch-pounds.
The fittings are not designed to withstand loading. In other words, the fittings should not be used to support the pipe on a horizontal run. Tyler recommends that the pipe itself has to be supported by bracing or supports, so no weight is placed on the fitting.
The tensile strength of the fittings is 1,500 psi. This means the fitting will not tear if it is it is subjected to this force. For many applications, the forces encountered are much less than this. The tear resistance of the rubber is 150 psi. Again, this is far beyond the forces encountered during use. Tyler states the fittings will not leak after being deflected 5 degrees.