PEX Installation Manual

IM-PF 724596 0416
16
6.5 Making a Viega PEX Crimp connection
RING SIZE MINIMUM MAXIMUM
⅜" 0.580" 0.595"
½" 0.700" 0.715"
¾" 0.945" 0.960"
1" 1.175" 1.190"
Table 6.1 Crimp Diameter Dimensions. Crimp outside diameters
should fall within these dimensions when measured with a
micrometer or caliper.
1. The tubing should be cut squarely and evenly without burrs. Uneven, jagged or irregular cuts will
produce unsatisfactory connections.
2. The diagram shows a correctly cut tube compared with an incorrectly cut tube.
3. Slide the crimp ring onto the tubing and insert the tting into the pipe to the shoulder or tube stop.
4. Position the ring ⅛" to ¼" from the end of the tubing.
5. The ring must be attached straight. Center the crimping tool jaws exactly over the ring. Keep the tool
at 90° and close the handles completely. DO NOT CRIMP TWICE.
6. When checking crimp connections with a caliper (GO/NO GO gauge), push the gauge
STRAIGHT DOWN over the crimped ring. NEVER slide the gauge in from the side. Do not attempt
to gauge the crimp at the jaw overlap area. The overlap area is indicated by a slight removal of the
blackening treatment. A crimp is acceptable if the GO gauge ts the ring and the NO GO does not.
A crimp is unacceptable if the GO gauge does not t the ring or the NO GO gauge does t. An
incorrect crimp must be cut out of the tubing and replaced. If you check the crimp connections with a
micrometer or caliper, use the dimensions shown in the chart above.
1
/
8
” to ¼”
90°
1 2 3
4
5
6