Swing Joints (specify type - Unitized, Factory-Assembled, Assembly Kit; diameter - 1", 1?quot;, 1?quot;, inlet and outlet styles, lay length - as applicable) shall be rated at 315 psi. maximum working pressure @ 73 F when tested in accordance with ASTM D3139, including internal hydrostatic pressure @ 787 psi. for 60 minutes and short-term pressure of 1008 psi. without leakage or failure. Their performance shall be warranted for three years to installers and owners of irrigation systems.