Objectives

The primary objective of this tender is to obtain quotations from qualified contractors for the repair and replacement of Bermad valves on the Nseleni supply reservoirs. The work aims to restore operational functionality of the valves, improve water control, and ensure water balancing across different zones. The scope includes replacing non-functioning bulk meters and bermad valves, constructing valve chambers, and conducting testing and commissioning to ensure proper operation.

Scope

The scope of work encompasses:

• Providing labor, materials, and equipment for repairs and installations.
• Pumping out water from flooded chambers.
• Removing faulty level control valves and installing new ones.
• Excavating pipelines to expose installation points.
• Supplying and installing Table 16 flanged level control valves (sizes 50-80mm) with fittings.
• Constructing valve chambers according to engineer specifications.
• Providing circular manhole rings with heavy-duty covers and concrete lids.
• Testing and commissioning all new installations and fittings.
• Ensuring compliance with the Occupational Health and Safety Act (OHS).
• Adhering to CIDB grade rating of 1CE or higher.

Technical Requirements

The technical requirements include:

• Assessment of existing non-operational bermad valves and bulk meters.
• Replacement of faulty valves with new Table 16 flanged level control valves (50-80mm).
• Construction of valve chambers to specifications.
• Supply of heavy-duty circular manhole rings and covers.
• Compliance with relevant standards such as SABS 1200 AA, C, DA, DB, GA, LB, L, PSGA, PSDB, PSGA2, PSGL, and PSGL1.
• Use of steel and welding conforming to SABS standards.
• Proper identification and protection of existing site services during excavation.
• Adherence to construction regulations and safety standards.
• Testing and commissioning of all installations upon completion.

Skills Requirements

The contractor must possess:

• A CIDB grade rating of 1CE or higher.
• Competence in earthworks, pipe trenching, concrete works, and pipe bedding as per specified standards.
• Experience in installing and commissioning water control valves and constructing valve chambers.
• Ability to identify and manage existing site services to prevent damage during excavation.
• Compliance with Occupational Health and Safety (OHS) regulations.
• Registration with the Central Suppliers Database (CSD) and provision of a valid CSD number.
• Provision of a Letter of Good Standing from the Compensation Fund.
• Capability to undertake testing, commissioning, and quality assurance of water control systems.