4 - STEP INSTALLATION GUIDE ® Whether for potable water , radiant heating systems , or industrial use , installing GTPEX is always fast and easy . ® Here is our unique GTPEX 4 - Step Installation Guide : 1 . CUT ® pipe at a 90º angle using the Cut the GTPEX appropriate PEX cutter , such as our GTCut tool . 2 . INSERT Insert the ring onto the pipe at about 1 / 8 ” from the end . ® pipe until the pipe end Insert the fitting into the GTPEX tightly reaches the shoulder of the fitting . 8.5 3 . CRIMP Make sure the ring is still 1 / 8 ” from the end of the PEX pipe . Use the appropriate tool ( such as GTCrimp ) to crimp the ring over the pipe until the tool is completely closed . 4 . TEST Test the crimp ring with the “ Go - No - Go ” tool to make sure the crimp pressure is satisfactory . To do this , use the appropriate tool size and slide it directly onto the crimp ring according to the crimp tool instructions . Do not slide the “ Go - No - Go ” tool on the PEX up to the ring . If the crimp ring fits inside the end of the “ GO ” side , then your crimp passes the test and you may move to the next fitting . If the crimp fits inside the end of the “ NO GO ” side of the tool , the crimp ring is over - crimped ; remove the fitting and start over with step 1 . Before restarting , the crimp tool must be recalibrated according to the manufacturer’s instructions . The 4 - step installation is now complete . If you need more information on the installation ® , please contact us at 1 - 877 - GTGLOBE . of GTPEX E251007 - US