Bottle washing water should be specified by its function: incoming wash water, intermediate rinse, final product-contact rinse, recovered water or cleaning stream. Each stream needs a defined quality and discharge route.
Pressure and flow determine whether the equipment can operate as designed. Water quality determines whether a stream is suitable for its intended bottle contact and whether deposits, spotting or contamination could be introduced. The site should define both.
The Drinking Water Inspectorate publishes guidance on the use of water in food production and the responsibilities around water quality. Use the current DWI information and site-specific food-safety assessment to establish the appropriate requirement; do not assume every recirculated stream is suitable for final contact.
| Water stream | Specification question | Monitoring/segregation question |
|---|---|---|
| Incoming mains or treated water | Source, hardness, suspended solids, treatment and seasonal variation | Where is it sampled and who owns the result? |
| Main wash liquor | Temperature, chemistry, soil loading and renewal/control method | How is condition monitored and when is the bath dumped? |
| Intermediate rinse | Purpose and permissible carry-over to the next stage | Can counter-current or recovered water be used within the validated boundary? |
| Final rinse | Required quality at the last bottle-contact point | How is backflow, cross-connection and contamination from reuse circuits prevented? |
| Recovered water | What treatment is required for its defined reuse? | How are filtration, storage time, temperature and purge controlled? |
| Cleaning/flush water | What contaminants and chemicals can it contain? | Is it segregated from normal rinse discharge? |
UK Government guidance explains that liquid waste discharged to a public sewer may be trade effluent and can require consent from the sewerage undertaker; discharges to surface water or ground can involve different environmental-permit requirements. Check the current GOV.UK discharge guidance and obtain site-specific advice before finalising the drain connection.
Lancing can then review the equipment interface without assuming that site water or discharge capacity is available.
Request a utilities reviewBottle washing can create process wastewater containing soils, labels, adhesive, detergent or other residues. The site should check whether the discharge is trade effluent and what sampling, volume, pH, temperature or constituent limits may apply before installation.
The site should identify where washer drain water will go, whether solids and labels are intercepted, the proposed discharge point, expected operating pattern and the local water retailer or wholesaler route for consent questions. Limits and permissions are site-specific and should not be assumed from another installation.
Water quality can affect visible spotting, residue carryover, odour, scale and consistency. If the final bottle condition is critical, the brief should state the water source, treatment route and acceptance test rather than relying on the phrase “mains water”.
A bottle washer may be technically suitable but still impractical if the site has no agreed route for wash water, rinse water, label debris or cleaning discharge. Record whether the discharge enters a foul sewer, a treatment system or another route, and confirm any consent or agreement requirements with the relevant authority.