S-2.1, r. 9 - Regulation respecting concrete pumps and distribution masts

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8. The following information shall be permanently displayed on each rigid pipe and shall be clearly legible at all times:
(1)  the manufacturer’s name;
(2)  the nominal diameter;
(3)  the permissible maximum pressure; and
(4)  the thickness.
O.C. 1520-92, s. 8.