Progress Report on Leak repair at Saron in the Drakenstein Municipal Area

Transcription

1 Progress Report on Leak repair at Saron in the Drakenstein Municipal Area André Kowalewski 15 February 2012 Detecting & Fixing Water Leaks- Saron Project

2 Presentation Outline Background on Saron Water Demand Management (WDM) strategy Implementation Plan Results Conclusion

3 Saron Saron is situated 80 km to the North of Paarl Population: Total 6002 (2001 Census) There are 1877 erven Annual water demand: Total kl Demand per capita: 354 liters/person/day (Average for Drakenstein 240liters/person/day) Main water sources: from the Leeu River, North- East of the town

4 Water Demand Management Strategy Purpose of the Project: To raise the awareness of poor and indigent residents who have high water consumptions Unacceptably high levels of Minimum night flow (12-14 l/s) (UAW 34 %) To audit the plumbing of properties and identify leaks To identify other reasons for high water consumption And to provide a bill of quantities as an input into leak a repair project

5 Flow (l/s) Minimum Night Flow SARON: Flows: MNF 2008:10.52l/s /04/ /04/ /04/ /04/ /04/ /04/ /04/ /05/2008 Date (in 2009) 2008 MNF 2008

6 Implementation Plan

7 DWAF awarded R 2,000,000 for leak repairs poor areas We also won R 500,000 for a award from DWAF Saron has a very high minimum night flow and we decided to take it as a pilot project We started the process in August 2008

8 1. Appoint a service provider Duties include: - Interact directly with the owner/tenant of properties - Complete an audit form which will identify where there are water leaks and identify other causes for high water consumption - Provide owner with the following information verbally and in pamphlet form - Water saving tips - How to identify water leaks - How to repair basic water leaks

9 Brochure (front page)

10 Brochure (back page)

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12 2. Process The report was accepted by Council in September 2008 The tender process were started in October 2008 After a delay as a result of the waiting period, it was awarded to Shamrock Plumbers, in mid December Shamrock Plumbers started in mid January with the audit and visit each property and gave notice to the owner of what they intend doing The contractor started with the repairs in February Some of the leaks they found are illustrated in the following slide

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24 de? d in BOQ Code Faulty? 15 mm 20 mm 22 mm other Irrigation pipe fitting Galvanised Elbow M/F Elbow F/F Nipple Socket Back nut Straight F / I Straight M / I Elbow F / I Elbow M / I Straight M / I Straight F/ I Copper to copper Elbow F / I Copper tee Wall elbow BOQ Code Faulty? Missing? 15 mm 22 mm Hot Cold Replace Complete Headgear Top Jumper Gland nut Washer Washer Other (specify) Basin Good Faulty? Missing? yes no plastic or brass Kent Castle other yes no None On Mainsside On Propertyside Meter Consumer side Municipal side Yes No Yes No Version 3 Date 2009/01/21 PRIVATE PROPERTY LEAK REPAIR PROJECT AUDIT / CHECK-LIST SHOWING BOQ REFERENCES - SHEET 2 OF 2 PLUMBER CONSULTANT STREET NO. STAND NO. STREET NAME AREA A: Meter no Condition Meter in single box Conventional - Manafacturer Type meter in double box Leak Present? Meter Reading Stop cock Meter turning Is there a vis the Pro P or B Condition Size Water Type Material Required Bathro B: Taps Enter type below Tap x x x Brass bibtap x Tap x x x Brass bibtap x Tap x x x Brass Pillar tap x Tap x x x Brass Pillar tap x Tap x x x Brass stopcock x Tap x x x Brass stopcock x Tap 7 540% x x x Cobra Stela x Tap 8 Refer to Sheet 1 for brass taps 5.1 and 5.2 C: Fittings Size Material Required HDPE Copper Fitting-pipe 550% x x #### Fitting-pipe Fitting-cistern Var x x Fitting-cistern Diameter Existing material Pipe required/installed

25 Registered as Indigent? Yes No Waste leak? Yes No If no, qualify as Indigent? Yes No Owner Applied for Indigent Status? Yes No Occupier Date applied for Indigent Tentant.. Additional comments Acceptance of Audit I,. hereby agree to Owner/Occupier (Name of Owner / Occupier) property by the authori Surname Municipality, in terms o First Names Municipality, and sign ID Number and purposes, cognisan Address (if differ from above) Contact Details Length of stay on the Property yrs mths Signature of Owner / Occupier Signature of Plumbing auditor Signature of Consultant Repairs completed on 20. / / Signature of owner/occupier Signature of Contractor Signature of Consultant

26 Results

27 Flow (l/s) Minimum Night Flow SARON: Comparison of Flows: 2009 and MNF 2009: 5.75 l/s MNF 2008:10.52l/s 0 25/04/ /04/ /04/ /04/ /04/ /04/ /04/ /05/2009 Date (in 2009) MNF 2009 MNF 2008

28 Minimum Night Flow: July 2011

29 MNF (L/s) Flow Comparison Minimum Night Flow Comparison (2 to 11 May) l/s increase 4.3 l/s decrease after repairs Day of month 2008 MNF 2005 MNF 2008 Average MNF 2005 Average MNF 2009 MNF 2009 Average MNF

30 Statistics

31 Statistics Number of properties visited 1,413 Number of properties repaired 1,178 Percentage properties with leaks 83.4% Percentage properties repaired with cistern leaks 30.9% Percentage properties repaired with leaks on pipes 64.2%

32 Statistics Total cistern leaks 364 Multiflush cisterns installed 292 Total other leaks on cisterns 72 Total Tap Leaks 1,475 Taps replaced 1,352 Other tap leaks 123 Stopcocks replaced 254 Properties with pipe leaks 756 Metres of pipe replaced 8,335 Average pipe length replaced per property 11.0

33 Conclusion Project is a success The project has resulted in a savings of 4.77l/s or 17.2m³ per hour (and for 2010/2011 a saving of 6.7l/s or 120Ml/annum was achieved) Postponed the need for an additional reservoir 83.4% of properties needed repairs 1,352 taps were replaced. 64.2% of the properties repaired had pipe leaks Shamrock is back on site due to expenditure under estimations by themselves Sustainability measures still to be put in place and is an ongoing process.

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