Short answer: the details that actually determine the recommendation

When a customer is referred for a polyphosphate or siliphos crystal product, the referral usually arrives with a product name and almost nothing else. That is not enough to specify anything. To move from a name to a workable recommendation, the person passing on the referral should share six categories of information:

1. Source water quality — at minimum, hardness, pH, and temperature, plus anything unusual such as high iron, manganese, chlorine, or suspended solids.
2. Flow conditions — average and peak flow rate, daily volume, and whether flow is continuous or intermittent.
3. Application and outlet type — what the treated water is used for, and whether it is intended for human consumption.
4. Installation point and equipment — where the device sits, what it feeds, pipe size and material, pressure range, and available space.
5. Objective — the specific problem to solve: scale inhibition, corrosion control, or something else entirely.
6. Maintenance reality — who will service it, how often it can be accessed, and what replacement or refill method is practical.

The rest of this article explains why each item matters, what a complete answer looks like, and which details are commonly missing when a referral goes wrong.

What the referred product name tells you — and what it does not

“Siliphos”, “siliphos crystal”, “polyphosphate media”, and “phosphate crystal” are used loosely in the trade, and they are not automatically interchangeable. Some are silicate-phosphate glass products that dissolve slowly in a cartridge or tumbler-style housing; others are different polyphosphate forms with different dissolution behaviour, dosing characteristics, and permitted applications.

This matters for a referred customer because a recommendation built around one material form may not transfer to another. Two products with similar names can differ in dissolution rate, how they respond to water temperature, and how much material is needed for the same flow. So when someone refers a customer, they should also state:

• The exact product description, brand name, or part number they have been using or were told about.
• The form: crystal, bead, granular, or pre-filled cartridge.
• Whether it was supplied as loose media, a sealed cartridge, or part of a larger dosing device.

If the answer is “I’m not sure, it’s just the crystal we always use”, that is worth saying openly. It tells the supplier that the material needs to be identified rather than assumed.

Source water details worth sharing

Water chemistry is where most vague referrals fall apart. The supplier cannot judge whether a dissolving phosphate material will work, how long it may last, or whether it is appropriate at all without knowing what is in the water.

The minimum useful data set

• Total hardness (as CaCO₃ or in the local convention — state which).
• pH, ideally the range observed, not a single reading.
• Water temperature at the point of installation, including seasonal variation if it is significant.
• Iron and manganese levels if any test results exist.
• Chlorine or chloramine residual, if the supply is municipally treated.
• Suspended solids or turbidity, if the source is surface water or a well with known sediment.

Where the water comes from

A municipal supply, a private well, a borehole, and a tanker delivery are four different situations. Municipal water is generally more stable but may carry a disinfectant residual; well water can shift with rainfall, drawdown, or seasonal recharge. Stating the source helps the supplier interpret the numbers and ask better follow-up questions.

If a laboratory report exists, share it — but also note which sample point it came from. A test taken at the wellhead and a test taken downstream of existing treatment are not the same water.

Flow rate, sizing and how the system actually runs

Flow is the detail most often given as a single number when two numbers are needed. Share both:

• Average or normal flow — what the system sees most of the day.
• Peak flow — what it sees when demand spikes, such as multiple outlets running at once.

Also describe the pattern. A continuously recirculating system, a household with morning and evening peaks, and an intermittent process line all behave differently. Daily or weekly volume, if known, is helpful. If the flow rate is unknown, say so — and describe the equipment and the number of outlets instead. That is far more useful than a guessed figure.

Pressure range matters too, because it affects housing selection and mechanical integrity, even though it does not change the water chemistry.

Installation point, equipment type and configuration

This is where referrals most often omit practical detail. Useful information includes:

• Where the device will be installed: mains entry, after a storage tank, before a specific appliance, or on a dedicated process line.
• What is upstream and downstream — filters, softeners, pumps, boilers, heat exchangers, coffee machines, or nothing.
• Pipe size and material at the connection point.
• Available space and orientation, including whether the housing can be mounted vertically or must be horizontal.
• Whether the installation is new or replacing an existing product, and if replacing, what the old one was and how it performed.

Existing treatment deserves special attention because it changes the water that reaches the phosphate device. If a softener is installed upstream, for example, the hardness the phosphate product would have acted on is largely gone. That is not necessarily a problem, but it changes what the device is doing and whether it is needed at all.

Clarify the objective — these functions are not the same

Referrals frequently describe the goal imprecisely, which leads to the wrong product being quoted. It helps to state plainly which of the following the customer is trying to achieve:

Function	What it means	Typical treatment approach
Scale inhibition	Slowing or preventing new calcium carbonate deposit from forming	Threshold treatment with polyphosphate or similar materials
Water softening	Removing calcium and magnesium from the water	Ion exchange resin, not phosphate media
Scale removal	Dissolving or breaking down existing deposit	Chemical cleaning or mechanical descaling
Filtration	Removing particles, sediment or turbidity	Mechanical or cartridge filtration
Corrosion inhibition	Reducing metal loss in pipework or equipment	Depends on system and metallurgy; phosphate chemistry may play a role
Disinfection	Inactivating microorganisms	Chlorination, UV, ozone or other dedicated processes

A phosphate crystal product is generally discussed in the context of scale inhibition and, in some systems, corrosion control. It does not soften water, remove existing scale, filter sediment, or disinfect. If a referred customer is expecting any of those outcomes, that expectation should be surfaced before a product is quoted.

Application and regulatory context

State what the treated water is used for: domestic hot and cold supply, commercial kitchen equipment, laundry, cooling or heating circuits, a process line, or irrigation. This affects both product selection and the level of documentation the customer will need.

If the water is intended for drinking or food preparation, do not treat “food grade” as sufficient on its own. Suitability for potable water depends on the exact product, the dosage conditions in that system, and the regulations of the destination market. Those points need to be confirmed for the specific product and country rather than assumed from a general description. If the referral involves potable water, flag it early so the supplier can advise on what verification is required.

Maintenance, access and replacement practicalities

Even a technically suitable product fails in practice if nobody can service it. Share:

• Who will carry out maintenance and whether they have any water-treatment experience.
• How accessible the installation point is.
• Whether the customer prefers refilling loose media or swapping a sealed cartridge.
• Any downtime constraints or site rules that limit service windows.

Do not estimate a replacement interval on the customer’s behalf. Service life depends on the product form, the throughput it sees, the water chemistry, and the temperature — factors that must be assessed together by the supplier using the data you provide.

A referral checklist you can send with the enquiry

Anyone passing a customer to a supplier can use this list. It takes a few minutes and prevents most back-and-forth.

• Product name, form, or part number previously used, if any.
• Water source and any available test results, with the sample point noted.
• Hardness, pH, temperature, and any notable water-quality issues.
• Average flow, peak flow, and daily or weekly volume.
• Installation point, upstream and downstream equipment, pipe size and material.
• Operating pressure range and available space.
• The specific problem to be solved, stated in the customer’s own words.
• Final use of the water, and whether potable-water approval is required.
• Maintenance preferences and site access constraints.
• Destination country, since documentation requirements vary.

Frequently asked questions

Can the end user simply send a water test report instead of answering everything?

A test report is valuable and should be shared, but it does not replace the installation and flow information. The report describes the water; the installation details describe how that water is used and how much of it passes through the device.

The customer does not know the flow rate. What then?

Describe the equipment instead: the number and type of outlets, pump rating if known, tank size, and whether demand is steady or intermittent. An honest description is more useful than an invented figure, and a supplier can often narrow the options from it.

Is a photograph of the installation helpful?

Yes, for layout, mounting and pipework questions. A photo does not substitute for measured water data or flow figures, and it should not contain personal or identifying information about the end customer.

Do I need to share the end customer’s name and address?

No. Application type, water conditions, flow data, and destination market are sufficient for most technical discussions. Personal data should be shared only with the customer’s consent and only when it is genuinely required.

Turning a referral into a workable specification

A referral becomes useful when it carries enough context for a supplier to reason about the system rather than guess at it. The six categories above — water quality, flow, application, installation, objective, and maintenance — cover almost everything a technical review needs, and each one is something the referring party can usually obtain with a short conversation and, where available, an existing water test.

If you are referring a customer for a siliphos crystal or polyphosphate product and want an initial assessment, send us the application type, source-water details, flow conditions, equipment and installation description, required specification, quantity, and destination country. With that information, ENVO CHEMICAL can respond to the technical question directly rather than asking for the same details one at a time.