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-25- <br />for its seal shall be used. No trap which depends upon <br />concealed interior partition that, in case of defect, would <br />allow the passage of sewer air, shall be used. Each urinal <br />must be separately trapped immediately under the fixture <br />except when batteries of urinals of a type having continuous <br />flow of water are used, when a single trap will suffice. <br />Section LXXXVII. Each trap except floor drains shall <br />have a water seal of not less than two inches. <br />Traps placed between the floor shall have a brass trap <br />screw for cleaning in plain view or flush with the floor, or <br />readily accessible from or under the floor. <br />All traps shall be rigidly supported and set true with <br />respect to their water level, and shall be so located as to <br />Protect their seals. <br />Section LXXXVIII. Cleanouts shall be the same size as <br />the pipe up to four (4) inches in diameter and not less than <br />four (4) inches for larger pipe or traps. <br />Cleanouts shall be provided as follows; At the foot of <br />all vertical lines of soil pipe, and at the end of each <br />horizontal line. The distance between the cleanouts shall <br />not exceed fifty (50) feet. <br />All traps and cleanouts shall be located so as to be <br />easily accessible for cleaning. <br />Section LXXXIX. Each single fixture shall be separately <br />trapped by a 4" water seal trap, placed as close to the <br />fixtures as possible. <br />No cellar or area drain shall be placed within 5 feet <br />Of a house drain or soil stack to which a rainwater drain <br />connects unless said floor drain is properly revented. <br />All floor drains in toilet rooms and beneath urinals <br />shall be revented as herein provided for other fixtures. <br />A set of not more than three wash trays or wash stands <br />or a set of one or two wash trays with sink combined, may <br />connect with a single trap, provided the trap is placed <br />