Direct Answer
An integrated water supply system combines pretreatment, membrane filtration, disinfection, treated-water storage and constant-pressure supply. Define these functions as scope items within the complete system and ask which equipment, controls and connecting works are included, optional or supplied by others.
The complete system architecture includes storage and pressure supply, but a quotation for a treatment module alone may cover only part of that architecture. In the documented modular treatment configuration used here as a PVDF UF example, the process uses hydrophilically modified PVDF hollow-fiber ultrafiltration, with pretreatment selected for the raw water and a disinfection stage before product-water delivery.
Application Scenarios
For remote work sites, temporary camps and rural communities, the RFQ should describe both the water source and the users receiving the treated water. Equipment selection also needs to account for available utilities, installation access and local operating support.
For industrial facilities, identify the intended water use and its quality requirements. A proposal should state the agreed product-water criteria rather than relying on general descriptions such as “clean water.”
These are project-planning scenarios, not claims of completed installations or guaranteed suitability.
Selection Factors: Start with Two Sets of Requirements
1. Water treatment requirements
Provide the raw-water source, available analysis, seasonal changes, required treatment capacity and intended product-water use.
Ask the supplier to explain the pretreatment selection and specify the proposed membrane material and module arrangement. UF or ceramic membrane filtration may be selected for the confirmed project configuration; this does not imply direct interchangeability of modules. In the PVDF UF example discussed here, the membrane is PVDF hollow-fiber ultrafiltration; ceramic membrane should not be substituted in that example description.
The proposed disinfection stage and any water-quality commitments must be identified in the project offer.
2. Water delivery requirements
Provide the delivery locations, expected demand pattern, required pressure at the agreed delivery point and available information about the downstream pipework.
Request a separate statement covering treated-water storage and pressure boosting. Where either is supplied by another contractor, define the connection point and responsibility for installation and controls.
Customized based on raw water conditions, required capacity and project requirements.
Configuration and Scope Table
| Scope item | What the buyer should provide | What the supplier should confirm |
|---|---|---|
| Raw-water connection | Source, analysis and available inlet conditions | Package inlet requirements and connection boundary |
| Pretreatment | Water-quality variation and existing upstream equipment | Selected process and equipment included |
| Membrane Filtration | Treatment duty and required product-water criteria | UF or ceramic membrane filtration depending on the confirmed project configuration; membrane material, module arrangement and operating requirements |
| Disinfection | Intended water use and project requirements | Proposed method and scope included |
| Treated-water storage | Storage needs and any existing tank | Whether a tank is included, with defined interfaces |
| Constant-pressure supply | Delivery-point pressure and demand information | Whether pumps and controls are included |
| Site integration | Utilities, access and installation responsibilities | External pipework, cabling and commissioning boundaries |
The table is an RFQ framework, not a standard equipment specification.
Compare Offers on the Same Basis
Before comparing quotations, check whether each supplier has included the same treatment stages and downstream equipment.
Ask for a scope schedule marked included, optional, by others or excluded. Request a process diagram showing the package inlet, product-water outlet and connections to storage or pressure supply.
A quotation for a treatment module and a quotation for treatment plus storage and boosting describe different supply scopes. Resolve those differences before comparing the offers.
RFQ Checklist
Send the following information with your enquiry:
- Project location and intended water use.
- Raw-water source, available test report and known seasonal changes.
- Required treatment capacity and anticipated operating schedule.
- Product-water quality requirements.
- Water-demand pattern and required delivery pressure.
- Existing or proposed treated-water storage.
- Electrical supply and available installation space.
- Site access and preferred modular, skid-mounted or containerized arrangement.
- Local operating support and maintenance access requirements.
- Requested boundaries for equipment, pipework, controls and commissioning.
If information is unavailable, mark it as pending. Ask the supplier to identify the assumptions that must be resolved before final selection.
FAQ
Does every quotation include the complete storage and pressure-supply scope?
Storage and constant-pressure supply belong to the complete system architecture. Confirm whether the quotation covers the complete system or selected equipment, and identify tanks, booster pumps and controls as included, optional or supplied by others.
Is the membrane in the PVDF UF configuration example ceramic?
No. The documented PVDF UF example discussed here uses hydrophilically modified PVDF hollow-fiber ultrafiltration. A different membrane option requires its own confirmed technical specification.
Can a standard capacity alone define the complete system?
No. The RFQ also needs raw-water information, product-water requirements, operating conditions and the downstream delivery scope. Capacity is one selection input.
What if the raw-water analysis is not available?
State that it is pending and request the supplier’s sampling and analysis requirements. Any preliminary configuration should clearly identify its assumptions and items awaiting confirmation.
Discuss Your Project
Send Grace Wang Environmental your raw-water information, required capacity, intended water use and delivery requirements. Request a proposal that clearly distinguishes treatment equipment from storage and pressure-supply scope.
Related product information: Intelligent Integrated Water Supply System