Gas-fired appliances
12. All parts of a gas-fired appliance shall be—
(a)so designed and constructed that leakage of gas is unlikely to occur, and
(b)constructed of materials which are compatible both with each other and with the gas used.
12. All parts of a gas-fired appliance shall be—
(a)so designed and constructed that leakage of gas is unlikely to occur, and
(b)constructed of materials which are compatible both with each other and with the gas used.