A HydroTap that delivers good-tasting filtered water every day still needs the internal water path maintained correctly. Knowing how to sanitise HydroTap lines helps reduce the risk of biofilm and stale water in the plumbing, particularly after a shutdown, low use period, filter change or repair.

Sanitising is not the same as replacing a filter. A genuine filter protects water quality during normal operation, while sanitisation treats the wetted lines and components that sit between the incoming water supply, filtration system and dispensing tap. The right process depends on the HydroTap model, its age and the work being carried out, so it should always follow the relevant Zip service procedure.

When HydroTap lines should be sanitised

A routine filter change does not automatically mean every internal line requires a full sanitisation cycle. However, sanitising is commonly appropriate when a unit has been switched off for an extended period, recommissioned after a tenancy change, installed in a new location, or opened for certain repairs.

It is also worth considering where a system has had very low daily use. This can occur in meeting rooms, holiday homes, schools during breaks, vacant commercial suites and hospitality areas that close seasonally. Water sitting in pipework for long periods is more likely to develop taste or odour issues than water that is drawn regularly.

If the unit is dispensing discoloured water, has an unusual smell, shows a fault code, leaks, or has inconsistent flow, do not assume sanitisation is the answer. These symptoms can point to a filter issue, inlet valve problem, blocked restrictor, failed component or an installation fault. A technician should diagnose the cause before any treatment is introduced into the system.

Before you sanitise HydroTap lines

The key rule is simple: use only the sanitising product, concentration and method approved for the specific HydroTap. Household bleach, vinegar, dishwashing liquid and general kitchen cleaners are not suitable substitutes. They can leave residues, damage seals or components, affect water taste, and create a safety risk if they enter a boiling or chilled water system incorrectly.

Before starting, identify the exact model and confirm the service instructions that apply to it. HydroTap systems vary across boiling, chilled, sparkling and filtered ambient configurations. Their internal layouts, menus and flushing requirements are not identical.

Have the correct genuine replacement filter ready if the service interval has been reached. For example, a compatible Zip GlobalPlus 3 Micron or MicroPurity 0.2 micron filter must match the unit and its intended water treatment requirements. A filter should not be reused if the manufacturer procedure calls for replacement during sanitisation.

You should also make sure there is clear access to the under-bench unit, isolation valve, power point and drainage point. In a workplace, let users know the tap will be unavailable. Place a notice on the dispenser if necessary, especially where the unit provides boiling water.

A safe HydroTap sanitisation process

The precise sequence should come from the model-specific service documentation or a qualified technician. In practical terms, a professional sanitisation service generally follows the stages below.

1. Isolate the unit and make it safe

The water supply is isolated as required, and the system is powered down or placed into the appropriate service mode. Boiling-water HydroTaps need extra care because stored water can be hot. Never remove covers, disconnect hoses or open a filter head while the unit is pressurised or hot.

For sparkling models, the CO₂ cylinder and associated water paths may also need to be managed in accordance with the service process. This is one reason generic online advice can be risky: the correct method for a chilled-only system may not apply to a boiling and sparkling unit.

2. Inspect the filter head, tubing and connections

Before introducing an approved sanitising solution, inspect accessible components for wear, leaks, damaged O-rings, loose fittings and signs of scale. Sanitising will not repair a deteriorated filter head or split tube. Replacing a failed OEM Replacement Spare Part at this point can prevent a return visit and protect the cabinet from water damage.

A technician will also check whether the inlet hose, outlet tubing and connectors are correctly seated. Small drips around a connection are not normal and should be rectified before the unit returns to service.

3. Treat the relevant water lines with an approved solution

The approved sanitising solution is introduced into the specified section of the water path using the correct service equipment. It needs sufficient contact time to work, but more is not better. Leaving a chemical solution in the system longer than instructed, or using an overly strong mix, can cause avoidable damage and make flushing more difficult.

This stage is where professional servicing delivers the most value. The technician can ensure the solution reaches the intended lines without contaminating parts of the system that require a different procedure. They can also identify situations where the unit should be repaired, descaled or recommissioned rather than simply sanitised.

4. Flush thoroughly and refit the correct filter

After the required contact period, the lines are flushed with clean water in the prescribed volume and sequence. Flushing is essential. It removes the sanitising solution and any loosened residue before the system is used for drinking water again.

The correct filter is then fitted or replaced, connections are checked, and the unit is recommissioned. Depending on the HydroTap configuration, this may include allowing chilled water to recover, checking boiling-water operation and testing sparkling-water delivery. Do not serve water until the required flushing and operational checks are complete.

5. Test performance before handing the unit back

A completed service should finish with a practical check of water flow, temperature functions, taste and visible leaks. The filter replacement date and any service work should be recorded so the next maintenance visit is easier to plan.

For commercial sites, this record is especially useful. Facilities teams can track recurring faults, coordinate filter changes across multiple kitchens and demonstrate a consistent maintenance approach for staff and visitors.

Common mistakes to avoid

The most common mistake is treating sanitisation as a quick pour-and-flush job. HydroTaps are premium appliances with electrical, plumbing and, in some cases, gas-related components. An incorrect process can affect performance or void support options.

Avoid using non-approved chemicals or improvised fittings. Do not bypass the filter without confirming the manufacturer-approved procedure. Do not flush boiling water into containers that are unsuitable for heat, and do not leave a unit switched off with stagnant water inside for months without arranging recommissioning.

It is also unwise to fit a cheap, incompatible cartridge simply because it appears to connect. Filter media, micron rating, flow characteristics and head compatibility matter. Genuine, correctly matched filters support both water quality and reliable operation.

DIY or professional service: which is right?

Some experienced owners can manage straightforward filter replacement where their model instructions allow it. Sanitising internal lines is different. It involves chemical handling, controlled flushing and model-specific knowledge, so professional service is usually the safer choice, particularly for boiling, chilled and sparkling systems.

A qualified technician is strongly recommended after a long shutdown, flood or plumbing work, when a leak is present, when the unit is displaying a fault, or when the system serves an office, café, medical setting or other high-use environment. For Sydney customers, KDAC Water Filtration can assess the HydroTap, supply genuine compatible consumables and complete the required maintenance work.

Keep the system fresh between services

Regular use helps keep water moving through the system. Replace filters on schedule, wipe the dispensing nozzle with a clean cloth as part of normal kitchen cleaning, and act promptly if taste, flow or temperature changes. Where a building will be vacant, arrange a planned shutdown and recommissioning process instead of simply turning the unit off and hoping for the best.

A properly sanitised HydroTap should return to service with clean water paths, the right filter in place and confidence that every pour is as dependable as the system was designed to be.