Water Leak Detection System – WLDS-20 mk3

Water Leak Detection System – WLDS-20 mk3

£815.50  + VAT

WLDS-20 mk3 (Water Lead Detection System) For installations with 2x pulsed water meters, measuring from the main (M1) and a sub pulse meter (M2).

Designed to monitor and detect major water leaks, to demonstrate compliance with BREEAM WAT 02 (Water monitoring) and WAT03 (Water leak detection and prevention) assessment criteria. Minor and major leak detection is possible at the site boundary and internally when used in conjunction with a main (M1) and a sub (M2) pulse meter.

Flow rate signals are monitored and data logged against your custom water usage consumption criteria. If the water leak detection system identifies that this flow rate has been exceeded it is potentially an indicator that the leak detector has recognised a water leak. An audible alarm will sound as per BREEAM WAT03 requirements, along with the optional ability to shut off the water supply via our solenoid shut-off valves.

  • Earn BREEAM Credits when used in conjunction with Pulsed Water Meters and SVM Solenoid Shut-off Valves
  • Avoid costly remedial works from major water leak damage, by ensuring potential leaks are detected and monitored
  • Ideal for water leak detection in commercial buildings
  • British designed and manufactured at our plant in Suffolk.

Download Product Specifications

SKU: WLDS-20 mk3

Water Leak Detection System – WLDS-20 mk3 Major Leak Detector

If the flow rate exceeds preset parameters an alarm sounds and optionally the water supply can be shut off.

WLDS water leak detection systems activate when the flow of water exceeds the preset maximum for the preset period. It identifies different flows and therefore leakage rates, in accordance with BREEAM WAT03. This gives you flexibility to adjust the parameters to suit your specific conditions.


  • Easy to navigate user interface
  • Accepts inputs from 1, 5, 10 or 100 LPP reed switch type pulse meters
  • Main (M1) & Sub (M2) pulse meters can have different K factors (number of pulses produced per gallon of water)
  • Seven-day clock enables different periods of high flow (HF) to be programmed
  • Peak flow capture enables easy setting of accurate parameters
  • Displays total throughput in litres – useful for parameter setting and water audits
  • Output contact for BMS or optional SB-100 sounder/beacon alarm
  • Output for 24v DC Normally Closed or Normally Open solenoid valve with timed service function
  • Solenoid valve set up enables a Normally Closed or a Normally Open solenoid valve to be selected in software
  • Timed valve service function can be set to reduce the likelihood of valve sticking due to calcification etc.
  • Manual override (protection off) function with adjustable timeout period
  • External alarm input for the connection of ancillary equipment such as tape leak sensing to be interfaced to the water leak detection system
  • Enclosure 300 x 300 x 150mm with a RH hinged door. Facilitates easier wall mounting and access to the internal terminals
  • Alarm test function
  • Tough steel wall mounting enclosure to IP65 protection, optional wall mounting brackets WMB-100
  • Universal 100-240v 50/60Hz input for worldwide use
  • Designed and manufactured in the UK

Optional Extras


24v DC sounder beacon.


Steel wall mounting bracket kit for WLDS leak detection panels.

Power requirementsUniversal input 100-260v AC 50/60Hz 1.5A max
Pulse meter input24v DC 5mA maximum for reed switch type pulse meter, programmable for 1, 5, 10 or 100 litres per pulse
PSU output24v DC @ 1.1A for powering alarm or solenoid valves
Alarm outputNormally open free relay contact rated at 5A resistive load 250v AC / 30v DC
Valve outputFree relay contact rated at 5A resistive load 250v AC / 30v DC, programmable as Normally Open or Normally Closed with timed service function
Additional outputsTwo alarm contacts are available
External HF/LF inputOverrides internal clock
External alarm inputEnable ancillary equipment such as tape sensing to be interfaced to the WLDS-10/20 mk3 panels
LCD display2x 16 ASCII character with LED backlight
KeypadWith tactile feedback 0-9 numeric keys plus navigation keys for parameter setting and monitoring
ParametersLitres input range 1-32,767, time input range 1 minute – 45 hours, number of High Alerts to alarm: 1-99
Real-time clockDisplaying day and time (24hr format) with automatic GMT/BST changeover. Incudes battery.
ConnectionsDIN rail terminals, maximum conductor size 4mm², cable entry via IP65 cable gland in gland plate
EnclosureIP65, steel wall mounting overall dimensions 300x300x150mm (WxHxD) RAL7035 powder coated
WeightApproximately 6kg

To get in touch please call 01603 720999 or email sales@watersavers.co.uk

This product will typically be dispatched within 2-3 working days.

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