Technology House, Stratfield Park, Waterlooville, PO7 7XN 023 9223 3611
Speak to an expert
Legionella Flushing Monitoring

Little-used taps.
Easily forgotten.
Never missed.

Infrequently used outlets must be flushed on schedule or they stagnate. AQUAIOT detects a missed flush and evidences the ones that happen, so the flushing regime is proven rather than assumed.

Speak to an Expert See how it works
Live monitoring. Continuous compliance.
AQUAIOT L8 Dashboard
42Outlets OK
3Caution
1Alert
Sentinel Outlets – Live
Tank A – Cold Feed18.4°COK
Outlet 7 – HWS Return49.1°CCaution
Outlet 12 – Sentinel56.8°CAlert
CW Tank B17.2°COK
Man-in-a-van visits leave gapsInspection sheets capture one moment. Between rounds, temperatures drift unseen, and your compliance record has no answer for it.
Legionella thrives between 20C and 45CRisk conditions develop and resolve between visits. Manual schedules cannot catch what happens overnight.
Audit prep should not take daysWhen an inspector asks for records, paper logbooks take days to compile. A digital audit trail is instant.
Every missed flush is a duty-of-care gapOne undocumented flushing event is a defensible record waiting to fail under legal scrutiny.
The AQUAIOT Solution

Flush done?
Flush missed?
Both on record.

Flushing little-used outlets is the routine most likely to slip in a busy building. AQUAIOT monitors the temperature signature of use, so a missed flush flags itself and a completed one is logged.

Missed flushes flagged, an immediate alert when an outlet that should have been flushed shows no sign of use, so the action is prompted before water stagnates.
Completed flushes evidenced, the temperature change when an outlet runs is recorded with a timestamp, so the regime is proven, not just claimed.
Focus on the risky outlets, continuous watch on infrequently used and dead-leg outlets where stagnation, and Legionella, take hold first.
Request a Consultation
Live Outlet Status
CW Tank – Return Temp16.8°C
HWS Flow – Calorifier60.4°C
HWS Return – Loop 349.3°C
Sentinel Outlet 1256.8°C
Alert triggered – Outlet 12
Temperature above L8 calorifier threshold. Notification sent 14:32.
How It Works

Three steps to continuous L8 compliance

Step 01

Monitor

AQUAIOT sensors are deployed at tanks, loops, calorifiers, and sentinel outlets. Temperature is profiled continuously, every reading timestamped and logged to the cloud over secure cellular or LoRaWAN telemetry.

Step 02

Alert

When temperatures drift outside HSE L8 thresholds, or when a scheduled flush is missed, AQUAIOT triggers an immediate alert via SMS, email, or app, with role-based escalation rules for your estates team.

Step 03

Record

Every reading, alert, and action is captured in tamper-evident audit logs. Records are exportable on demand and integrate with CAFM, BMS, and AIMS systems, so audit preparation is minutes, not days.

Capabilities

Everything your L8 programme needs

Purpose-built for estates, facilities, and compliance teams managing water systems across single or multiple sites.

Real-time temperature profiling

Continuous monitoring at tanks, calorifiers, loops, and sentinel outlets. Every reading timestamped and stored, never a gap in your record.

HSE L8 threshold alerting

Thresholds checked against HSE L8 and ACoP guidance. Alerts fired immediately when cold water exceeds 20C or hot water falls below 50C at point of use.

Missed-flush detection

AQUAIOT detects when scheduled flushing routines are not completed and generates an automatic alert, so no event is undocumented.

Tamper-evident audit trails

Every reading and action is logged with a secure, unalterable timestamp. Exportable records ready for audit, inspection, or HSE enquiry at any time.

API / BMS / CAFM integration

Open and interoperable. AQUAIOT connects to your existing SCADA, AIMS, CAFM, and BMS platforms via RS485/Modbus or REST API, no lock-in.

Retrofit-friendly deployment

Non-invasive sensors designed for live environments. No pipe cutting, no shutdown. AQUAIOT engineers handle site survey, installation, and commissioning.

Compliance & Standards

Aligned to the standards your auditors check.

HSE L8 & HSG274 Part 2 Missed-Flush Alerts Flush Evidence Dead-Leg Watch
Book a Demo

No commitment. Talk to our engineering team.

Who It’s For

Built for the teams responsible

Housing Providers

Protect tenants. Prove compliance.

Housing associations and registered providers carry a statutory duty of care over water systems in their properties. Manual L8 management across multiple sites is operationally fragile, and increasingly under scrutiny.

  • Continuous monitoring across all properties, single dashboard view
  • Automatic alerts when vacant properties develop risk conditions
  • Audit-ready records for insurance, regulatory, and legal purposes
  • CAFM and property management system integration
NHS & Public Sector

Clinical-grade water safety. Without the admin burden.

NHS Estates and public sector facilities operate under HTM 04-01 and HSE L8 obligations. The complexity of large estates, multiple buildings, and dense pipework makes manual monitoring inadequate at scale.

  • Dense outlet coverage across clinical environments
  • Real-time temperature monitoring at thermostatic mixing valves and outlets
  • Integration with existing BMS and CAFM infrastructure
  • Automated compliance records compatible with HTM 04-01 requirements
Facilities & Estates

Less time on rounds. More time on management.

Commercial estates, universities, leisure facilities, and large offices face the same challenge: manual L8 inspection rounds are resource-intensive and provide only a snapshot. Automation changes that calculus entirely.

  • Replace labour-intensive manual rounds with automated monitoring
  • Role-based dashboard access for estates managers, deputies, and contractors
  • Reduce reactive call-outs, detect issues before they escalate
  • On-demand compliance reports for building managers and insurers
Defence & Secure Sites

Secure by design. Compliant by default.

Defence estates, MoD sites, and government facilities carry the same L8 duty of care as any other property, often across aging, complex pipework that is hard to reach and harder to document. Manual rounds leave gaps AQUAIOT closes permanently.

  • Encrypted telemetry, cellular and LoRaWAN with secure payload transmission
  • Tamper-evident immutable logs with timestamps and user actions
  • Role-based dashboard access, right records to the right people
  • Auditable compliance records meeting MoD and government estate requirements
Open, interoperable systems. No lock-in. Engineered for operational environments.
Cellular + LoRaWAN telemetry Encrypted payloads & OTA updates RS485/Modbus + REST API Role-based cloud dashboards CAFM / BMS compatible
Questions & Answers

Legionella flushing monitoring, answered

Why does flushing of little-used outlets matter?
Outlets that are rarely used let water stagnate, and stagnant water in the warm range is where Legionella proliferates. HSE guidance is to flush infrequently used outlets regularly to keep water moving. Monitoring confirms whether that flushing actually happens, because a flushing schedule on paper is only useful if it is followed.
How does AQUAIOT detect a missed flush?
AQUAIOT generates alerts when temperatures drift into risk zones or a flush is missed. When an outlet that should have been flushed shows no temperature signature of use within the expected window, the system raises an immediate alert, so the action is prompted before the water stagnates rather than discovered weeks later.
Can it evidence the flushes that do happen?
Yes. When an outlet is run, the temperature change is captured and logged with a secure timestamp, building a record of completed flushes. This turns the flushing regime into defensible evidence, showing not just that a schedule exists but that it is being carried out on the relevant outlets.
Which outlets benefit most from flushing monitoring?
Infrequently used outlets, dead legs, and seasonally idle areas, the points most prone to stagnation. These are where manual flushing regimes are hardest to keep up and easiest to let slip, so continuous monitoring of their use adds the most value and closes a common gap in water safety regimes.
How does flushing monitoring support compliance?
A missed-flush alert prompts and logs the corrective action, and completed flushes are timestamped, giving a tamper-evident record of the flushing regime exportable on demand. This supports your duty holder responsibilities under HSE ACoP L8 and HSG274 Part 2 by evidencing a control measure that is otherwise difficult to prove. The duty holder retains responsibility for the regime.
Explore the AQUAIOT range

Related AQUAIOT monitoring solutions

Automated Legionella Monitoring Legionella Monitoring Service ACOP L8 Legionella Monitoring HSG274 Part 2 Monitoring HTM 04-01 Water Monitoring Legionella Monitoring for Airports and Transport Hubs
Ready when you are

Prove your flushing regime is actually happening.

Talk to our engineering team about missed-flush detection and flushing evidence across your little-used outlets.

Speak to an Expert Book a Demo 02392 233 611
Legionella Flushing Monitoring – Speak to an AQUAIOT engineer about your estate.
Speak to an Expert
Shopping Cart (0 items)

© 2026 AQUAIOT LTD. Registered in England and Wales, company number 16585190. Registered office: Technology House, Units 10-11 Stratfield Park, Elettra Avenue, Waterlooville, Hampshire, PO7 7XN. Privacy policy