Most delays in industrial water projects start with the request for quote. A buyer sends a short description of what they want, four suppliers each make different assumptions, and the quotes that come back cannot be compared to one another. Weeks disappear into clarification emails that a better RFQ would have avoided.
Quick answer
A useful RFQ states feed water quality, required flow rate, target output quality, the application, available space and utilities, and the commercial terms you expect. Anything missing becomes an assumption, and every supplier will assume something different.
Feed water: where the quotes diverge
The single biggest source of pricing variation is what goes into the system. Two facilities asking for the same output can need completely different equipment depending on their source water.
- Water source: municipal, borewell, surface water, recycled process water
- A recent analysis, with hardness, TDS, pH, iron, silica, chlorides and organics where known
- Whether the source varies seasonally, and by how much
- Any existing pretreatment already installed
If you do not have a current analysis, say so rather than omitting it. Suppliers can quote against a stated assumption. They cannot quote against silence.
Output requirements, stated as a specification
"Clean water" is not a specification. State the standard the output has to meet, whether that is a conductivity target, a hardness limit, a pharmacopoeial standard, or a discharge consent limit you have been given. If the requirement comes from a regulator or a customer audit, name the standard.
Capacity and duty
Flow rate alone is not enough. Suppliers also need to know:
- Peak versus average demand, and how many hours a day the plant runs
- Whether continuous operation is required, or batch is acceptable
- Whether redundancy or standby capacity is expected
- Expected recovery rate, and what you plan to do with the reject stream
Site constraints suppliers cannot guess
Equipment that suits the process on paper may not fit the building. Include the footprint available, ceiling height, whether the location is indoors or outdoors, ambient conditions, available power supply, drainage, and access for installation and future maintenance. A skid that cannot get through the door is a solved problem only if someone raises it before fabrication.
The commercial half
Technical clarity does not help if the commercial terms are ambiguous. State your expected delivery window, whether installation and commissioning are in scope, what documentation you require, warranty expectations, and whether you want operator training or a service agreement quoted alongside. If you intend to compare on lifetime cost rather than purchase price, ask for consumable and energy figures explicitly, because they will not appear otherwise.
Make it easy to answer
Send the same structured document to every supplier rather than a free-text email to each. Identical inputs produce quotes you can actually lay side by side. A short form covering the fields above, with room for the supplier to note assumptions, will save more time than any amount of chasing later.
What this means for a manufacturer's website
If you sell this equipment, the same list is a specification for your quote request form. A generic contact box asks the buyer to work out what you need to know. A structured form that asks for flow rate, feed water quality and application collects a usable enquiry the first time, and signals that you understand the process.