Request for Quotation
RFQ Specifications
- Project Title: Supply, Delivery, Base Construction, and Installation of a 5,000L Back-up Water Tank System
- Project Site: Medical Practice, Pretoria East, Gauteng
- RFQ Reference: RFQ-2026-MED-WT01
- Issue Date: 12 October 2026
1. Project Overview & Scope of Work
The objective of this RFQ is to appoint a qualified, registered, and insured plumbing contractor to supply, construct, and fully install a 5,000-litre backup municipal water storage tank system for a medical practice located in Pretoria East.
Because this installation serves a medical facility, strict adherence to hygiene, continuous supply reliability, water quality, and local municipal bylaws (City of Tshwane) is required.
Key Deliverables:
- ✓Civil / Substructure: Full civil foundation/base construction (no existing concrete slab or suitable flooring exists at the designated location).
- ✓Supply & Delivery: Supply and delivery of a high-density polyethylene (HDPE) 5,000L food-grade water tank and a high-efficiency automatic booster pump system.
- ✓Plumbing & Tie-In: Full plumbing integration connected directly from the main building's existing municipal supply, incorporating proper backflow prevention, filtration, and bypass mechanisms.
- ✓Electrical: Electrical hookup for the automatic booster pump system from the main distribution board.
- ✓Testing & Commissioning: Pressure testing, disinfection/sanitisation, and client handover.
2. Technical Specifications
2.1 Civil & Base Preparation
- Site Preparation: Excavation, leveling, and compaction of ground at the designated installation area to support a dynamic weight load of at least 5,500 kg.
- Concrete Base:
- Minimum 150 mm thick reinforced concrete slab (25 MPa).
- High-tensile steel mesh reinforcement (e.g., Ref 193 mesh).
- Base dimensions must exceed the tank diameter by at least 100 mm on all sides.
- Must be perfectly level, smooth, free of sharp protrusions, and raised above surrounding ground level to prevent water pooling.
2.2 Water Storage Tank
- Capacity: 5,000 Litres vertical water storage tank.
- Material: 100% Virgin Food-Grade Polyethylene (UV-stabilised, dark inner lining to prevent algae growth).
- Compliance: SANS 1731 compliant (or equivalent ISO standard).
- Color: Standard green/beige or client-approved color matching the property exterior.
- Inclusions: Secure screw-top lid, leaf strainer screen, 50 mm bottom outlet, and top overflow outlet routed away from the foundation base.
2.3 Pump & Pressure Control System
- Booster Pump: High-efficiency self-priming booster pump (minimum 0.75 kW to 1.1 kW) rated to ensure consistent water pressure to medical fixtures.
- Controller: Electronic automatic pressure flow switch (digital pressure controller) with dry-run protection to turn off automatically if the tank runs dry.
- Acoustics/Protection: Weatherproof pump cover box to protect the unit from elements and attenuate noise for medical patients.
2.4 Plumbing, Filtration & Connections
- Piping: Heavy-duty Class 16 HDPE or Class 12 PVC/Copper piping from the main building supply to the tank base.
- Tie-In & Bypass Loop: 3-way manual bypass valve arrangement allowing seamless switching between direct municipal water feed and tank-boosted feed during maintenance.
- Backflow Prevention: Double check valve or vacuum breaker installed at the main connection to prevent cross-contamination into the municipal grid.
- Filtration System: Minimum 2-stage filtration system:
- Sediment filter (20 micron) to capture particulates.
- Carbon block/sediment filter (5 micron) to ensure clean, odor-free water suitable for medical facility standards.
- Isolation Valves: Full-bore brass ball valves on tank inlet, outlet, and bypass lines for easy maintenance.
3. Mandatory Compliance & Submission Requirements
To ensure safety and quality standards, bidding contractors must meet the following criteria and attach documentation to their submission:
- Professional Registration: Active registration with at least one recognised industry body (PIRB, IOPSA, CIDB, or Master Builders Association).
- Insurance: Valid Public Liability Insurance (minimum R2,000,000 cover recommended).
- Workmanship Guarantee: Minimum 12-month guarantee on installation workmanship.