In-line Thermal Disinfection Unit (ILTDU)

 

Disinfection: the reduction of the number of pathogenic micro-organisms to safe levels.

Problem
Via the incoming water supply and by retrograde contamination, Psuedomonas, Legionellae and other pathogens can colonise the last two metres of domestic water supply DWS pipework, including the outlet fitting (any TMV, tap or shower). This problem is specifically described in the Addendum to Health Technical Memorandum 04-01.

Solution
Our In-Line Thermal Disinfection Unit (ILTDU) facilitates periodic high temperature thermal disinfection using the readily available hot water supply. Now the thermal regime can be extended to the point of water discharge: therefore, the wetted surfaces of all downstream components, including the mixing valve and the outlet fitting, can be raised to system temperature.

The narrated animation above provides further information about the ILDTU: explaining how it works, outlines safety considerations and also includes thermal imaging camera footage of the Optitherm tap fed via an ILTDU in disinfection mode.

Combine the disinfection process with pipework flushing at an elevated velocity using a Flushing Kit.  This serves to shear excess biofilm from the internal pipe surfaces and remove it to drain, thus improving water quality and reducing the contamination risk.

Results of initial hospital trials have proven the ILTDU to be highly effective in reducing Pseudomonas cfu counts to zero following a single treatment and replacing the need for POU filters. Read our case study from St Richard's Hospital in Chichester here.

Horne TSV1 shower panels are now available with an integral ILTDU and adapted Pipe Cover (with access slot for key operation) available in 465mm (T4 variant) or 940mm lengths (T9 variant).  For more information, look for the T4 and T9 Quick Code options via the shower selection pages.

Part Numbers
In-line Thermal Disinfection Unit:  ILTDU
Operating Key:  6236

Patents
The In-Line Thermal Disinfection Unit is a patented Horne design.

WRAS Approval
The ILTDU has been granted WRAS Approval: Approval Number 1511330 (certificate below)

How to Specify
Please copy and paste the statement below into your specification document:

HORNE IN-LINE THERMAL DISINFECTION UNIT, ILTDU
For routine thermal disinfection of showers, taps, TMVs, their associated pipe-work feeds, ancillary fittings, mixed water deadleg and terminal outlet fitting using the readily available system temperature hot water supply. Fits to hot and cold supply pipework drops and includes 2 No. 3-way ball valves connected by four-way link mechanism for switch between passive and disinfecting mode. Connections by compression fitting by 15mm copper pipe. Manual operation using bespoke key with safety warning (supplied separately).

Manufactured and supplied by Horne Engineering Ltd, PO Box 7, Rankine Street, Johnstone, PA5 8BD. Tel: +44 (0)1505 321455, Fax: +44 (0)1505 336287, email: sales@horne.co.uk 

 Recent Installations

  • Barnsley Hospital
  • Basildon Hospital
  • Calderdale Royal Infirmary
  • Cambridge University
  • Chelsea Football Club
  • Ealing Hospital
  • Frinton & Walton Swimming Pool
  • Garret Anderson Centre, Ipswich Hospital
  • Kings College Hospital
  • Leicester General Hospital
  • New Cross Hospital
  • Northwick Park Hospital
  • Monklands Hospital, NHS Lanarkshire
  • Peppermill Court CUE
  • Royal Bournemouth Hospital
  • Royal Marsden Hospital
  • St George's Hospital, Tooting
  • St Helier Hospital
  • St Marks Hospital
  • St Richard's Hospital, Chichester
  • The London Clinic
  • Watford General Hospital
  • Wexham Park Hospital

Useful Documents

In-line Thermal Disinfection Unit
PDF911 KB
ILTDU at St Richard's Hospital
PDF1741 KB
ILTDU Dimensions - DWG Document
Drawing File435 KB
ILTDU Dimensions - PDF Document
PDF51 KB
ILTDU Instructions
PDF716 KB
ILTDU with Pipe Cover Instructions
PDF860 KB
ILTDU In-service Record Sheet
PDF454 KB
WRAS Certificate - ILTDU
PDF325 KB