(iv) protected from kinking or dama

(iv) protected from kinking or damage.5.2.6 Prohibition on earthing of pipingPiping shall not be used as an earth electrode or earth continuity conductor.5.2.7 Isolation valves5.2.7.1 Manual isolation valvesManual isolation valves shall be in a readily accessible position. These valves shall be of a quarter turn type and constructed so as to indicate clearly whether the valve is in the open or closed position. If the purpose of the valve is not obvious from its location, the valve shall be labelled.Manual shut-off valves shall conform to Type 1 requirements of AS 4617 or equivalent and be certified.5.2.7.2 Automatic shut-off valvesAutomatic shut-off valves shall conform to Class 1 requirements of AS 4629 or equivalent, and shall be certified.5.2.7.3 Gas appliance connection and isolationIn Australia only, a shut-off valve shall be provided prior to the inlet connection of each appliance.5.2.8 Quick-connect devicesA quick-connect device shall not be(a) installed inside a caravan or boat; and(b) connected between a cylinder and a regulatorNOTE A quick-connect device is an acceptable means of isolation for appliances operated outside a caravan or boat however a separate means of isolation is also recommended.5.2.9 Jointing compounds and materialsJointing compounds shall not be used to compensate for ill-fitting joints and shall not be applied to compression joints, union joints, or POL fittings.Jointing compounds and materials shall —(a) conform to AS 4623 or equivalent and, in Australia, be certified;(b) be fit for purpose; and(c) be used only with chemically compatible materials and where the surfaces have been prepared and cleaned strictly in accordance with the relevant manufacturer’s instructions for the jointing compound or material.5.2.10 Miscellaneous componentsComponents shown in Table 5.2.10 shall conform with the applicable Standard and in Australia be certified.