Section 36, The Machinery (Safe Working Citation

(I) Every boiler shall be provided with at least one ·reliable pressure gauge. The dial shall be graduated to show pressures in English pounds per square inch, and on it the authorised working gauge pressure shall be distinctly marked with a red line. When the authorised working gauge pressure is less than two hundred pounds per square inch the dial shall be graduated to show pressures on not less than fifty per cent. nor more . than one hundred per cent. above the authorised working gauge pressure. Where the authorised working gauge is two hundred pounds per square inch or more, the dial shall be graduated to show pressures not less than one hundred pounds per square inch above the authorised working gauge pressure. (2) The pressure gauge shall have separate direct communication with the steam space within the boiler and be capable of being shut off therefrolll· The cock or valve for this purpose shall.be in sight.