This unit was sold as it stood for $16,500, the purchaser being responsible for dismantling and removing it. The two diesel driven pumps supplying the 750 ft. tank and the Peak tank were then set up over the foundation of the steam pump and put into service. The unit serving the 750 ft. tank proved quite satisfactory but after 40 hours in service the casing for the Peak Pump fractured. Investigation showed that the fracture was probably due to the earlier damage. A new casing was ordered and in the meantime the Peak tank is being supplied by the remaining two steam units in the station which, until a fourth unit which is to be electrically driven can be delivered, are to be maintained as standby plant.
205. Peak Pumping Mains. Work on these mains, referred to in paragraph 219 of last year's report, was satisfactorily concluded. The pipes were all steel tubes of 8 ins. internal diameter protected internally and externally with bitumen and connected with victaulic joints. The main to the 750 ft. tank comprised 2,600 ft. of Class C pipes. The main to the Peak tank was divided into three pressure sections, each 1,750 ft. long, pipes for the top section being of 6 w.g. metal and tested to 1,500 ft. head, the next lower section 1" thick for 2,000 ft. head, and the lowest section 1" thick to withstand a test pressure of 2,400 ft. head, i.e. 1,038 lbs. per sq. inch.
206. Standby Pumps. The diesel engined unit for Albany Pumping Station, referred to in para. 220 of last year's report, has still not arrived,
207. Mainlaying. An extensive programme of mainlaying was carried out during the year to improve the supply in congested areas, and to extend the supply to new building developments. The more important mains are referred to in other paragraphs.
208. During the year it was found possible to complete the programme of replacing the unsatisfactory black iron mains which were laid in the Peak district of the Island immediately
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This unit was sold as it stood for $16,500, the purchaser being responsible for dismantling and removing it. The two diesel driven pumps supplying the 750 ft. tank and the Peak tank were then set up over the foundation of the steam pump and put into service. The unit serving the 750 ft. tank proved quite satis- factory but after 40 hours in service the casing for the Peak Pump fractured. Investigation showed that the fracture was probably due to the earlier damage. A new casing was ordered and in the meantime the Peak tank is being supplied by the remaining two steam units in the station which, until a fourth unit which is to be electrically driven can be delivered, are to be maintained as standby plant.
205. Peak Pumping Mains. Work on these mains, referred to in paragraph 219 of last year's report, was satisfactorily concluded. The pipes were all steel tubes of 8 ins. internal diameter protected internally and externally with bitumen and connected with victaulic joints. The main to the 750 ft. tank comprised 2,600 ft. of Class C pipes. The main to the Peak tank was divided into three pressure sections, each 1,750 ft. long, pipes for the top section being of 6 w.g. metal and tested to 1,500 ft. head, the next lower section 1" thick for 2,000 ft. head, and the lowest section" thick to withstand a test pressure of 2,400 ft. head, i.e. 1,038 lbs. per sq. inch.
206. Standby Pumps. The diesel engined unit for Albany Pumping Station, referred to in para. 220 of last year's report, has still not arrived,
207. Mainlaying. An extensive programme of mainlaying was carried out during the year to improve the supply in con- gested areas, and to extend the supply to new building develop- ments. The more important mains are referred to in other paragraphs.
208. During the year it was found possible to complete the programme of replacing the unsatisfactory black iron mains which were laid in the Peak district of the Island immediately
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