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Costs Involved in Replumbing and Maintenance of Fresh Water Plumbing System
(For Information Only)


Table 1:

Sample Cases on Replumbing Cost of Communal Fresh Water Supply System

Total No. of Units Total Replumbing Cost (Note 1) Average Replumbing Cost Per Unit (Note 2)
48 $338,050 $7,042
20 $35,000 $1,750
40 $66,000 $1,650
245 $487,000 $1,988
132 $366,000 $2,773
47 $70,000 $1,489
109 $275,200 $2,525
46 $297,100 $6,459
7 $32,000 $4,571
(Source: Building Department's Building Safety Loan Scheme in 2004)

Notes :

  1. As replumbing works are usually carried out as part of the comprehensive repair works of a building, the total replumbing costs shown above do not include the costs of mobilisation, scaffolding and contingency, etc.
  2. The average replumbing cost per unit is derived from dividing the total replumbing cost by the total number of units. (Some cases include replacement of pumps and/or water tanks.) This is the average cost to be borne by each unit for replumbing works of the communal fresh water supply system, i.e. from water supply connection point at the building boundary up to the water meter positions of each unit. The replumbing cost for the fresh water inside service of each individual unit is not included.


Table 2:

Sample Cases on Annual Cost of Quarterly Cleaning and Sterilization of Water Tanks, Annual Checking of the Plumbing System and Annual Submission of Inspection and Testing Reports

Total No. of Units in the Building No. of Water Tank Average Annual Cost per Flat
160 2 $75
304 3 $65
(Source: a Plumbing Trade Representative)


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