EDS 07-0018 Welfare Facilities at Grid and

Document Number: EDS 07-0018
Date: 03/02/2016
ENGINEERING DESIGN STANDARD
EDS 07-0018
WELFARE FACILITIES AT GRID AND PRIMARY SITES
Network(s):
EPN, LPN, SPN
Summary:
This Engineering Design Standard provides guidance on the installation, removal
and repair of welfare facilities at Grid and Primary substations.
Owner:
Mark Dunk
Date:
03/02/2016
Approved By:
Sotiris Georgiopoulos
Approved Date:
16/03/2016
This document forms part of the Company’s Integrated Business System and its requirements are mandatory throughout UK
Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset
Management. If you have any queries about this document please contact the author or owner of the current issue.
Applicable To
UK Power Networks
External
All UK Power Networks
G81 Website
Asset Management
Contractors
Capital Programme
ICPs/IDNOs
Connections
Meter Operators
HSS&TT
Network Operations
UK Power Networks Services
Other
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Version: 2.0
Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
Revision Record
Version
2.0
Review Date
16/03/2019
Date
03/02/2016
Author
Mark Dunk
Why has the document been updated – Periodic review
What has changed – Reference to EDS 07-0105 added. Section 5 (Removal of Welfare Facilities):
Drivers for facility removal expanded, scope of works clarified. Section 7 (Dependent Documents)
added.
Document transferred onto a new template and rules applied
Version
1.0
Review Date
04/03/2016
Date
08/01/2013
Author
Helen Amare
Original
© UK Power Networks 2016 All rights reserved
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Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
Contents
1
Introduction ............................................................................................................. 4
2
Scope ....................................................................................................................... 4
3
Installation of New Welfare Facilities ..................................................................... 4
3.1
WC Pan and Cistern .................................................................................................. 4
3.2
Wash Basin ............................................................................................................... 5
3.3
Workmanship ............................................................................................................ 5
3.3.1
Noggings/Bearers ...................................................................................................... 5
3.3.2
Cisterns ..................................................................................................................... 5
3.3.3
Taps .......................................................................................................................... 5
3.3.4
Wastes/Overflows ..................................................................................................... 6
3.3.5
Sealant Pointing ........................................................................................................ 6
4
Maintenance............................................................................................................. 6
4.1
General Maintenance ................................................................................................ 6
4.1.1
Repairs to flushing arrangements .............................................................................. 6
4.1.2
Repairs to appliances ................................................................................................ 6
4.1.3
Leaks and pipe repairs .............................................................................................. 6
4.2
Legionella Control ..................................................................................................... 6
4.3
Periodic Water Risk Assessment ............................................................................... 7
5
Removal of Welfare Facilities ................................................................................. 7
6
References ............................................................................................................... 8
7
Dependent Documents............................................................................................ 8
© UK Power Networks 2016 All rights reserved
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Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
1
Introduction
This document provides guidance on the installation, removal and refurbishment of welfare
facilities at Grid and Primary sites.
2
Scope
Using a range of criteria based around the maximum travelling time from any geographical
location to a substation site, a list of sites was produced to indicate where facilities should be
removed and where new facilities should be installed.
This document includes the installation, removal and refurbishment/repair of:



Toilets;
Washing facilities;
All pipework and fittings associated with sanitary systems.
EDS 07-0105 ‘Grid and Primary Civil Design Standards’ shall be referred to regarding the
installation of welfare facilities on new Grid and Primary substation sites.
3
Installation of New Welfare Facilities
Installation of new welfare facilities will require a water supply and either drainage
connection or a septic tank and may require the provision of a new building to house the
facilities.
Washrooms shall be designed, installed and maintained to reduce or eliminate risks to
health and minimise maintenance.
A single washroom is to be provided with either an external steel security door or, if the
washroom is to be accessed from the Auxiliary Room, an internal minimum half-hour firerated timber or steel door.
The washroom to comprise of a low level glazed pedestal WC, a stainless steel hand wash
basin with ‘cold’ pillar, and water heater.
3.1
WC Pan and Cistern
Arrangement: Close coupled suite.
Pan: Armitage Shanks urinal or similar approved.
Seat and cover: Armitage Shanks Orion or similar approved.
Pan connector: To BS 5627 colour to match pan.
Cistern/Flush pipe: Plastic cistern with siphon fittings.
Flush volume: 7.5 litres.
Valve/Float/Operating mechanism: Armitage Shanks recommendations.
Other accessories: Chrome plated lever handle, flush pipe complete with connectors to be
white PVC with all relevant fixtures and fittings.
Sealing: Jointing between wall and pan as detailed in section 3.3
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Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
3.2
Wash Basin
Where a WC is connected, the room containing the WC shall also be fitted with a wash
basin, connected to the drainage system, with a hot and cold water supply.
Type: Saville Stainless SS/UW/L 600x450mm stainless steel or similar approved with one
tap hole for cold, no overflow and no drain plug or pipe shroud.
1 No. Nimbus inclined high neck pillar tap.
Waste: Plastic 32dia.
Trap: 75mm plastic bottle trap.
Other accessories:
Sealing: Jointing between wall and wash basin as detailed in section 3.3 with earthing
connection.
3.3
Workmanship
Installation Generally
Assemble and fix appliances and accessories so that surfaces designed to fall to drain as
intended.
Use nonferrous or stainless steel fastenings unless specified otherwise.
Wherever possible, fix supply and discharge pipework before appliances. Ensure that
appliances are fixed securely to structure and are not supported by pipework.
When not specified otherwise, use jointing and bedding compounds recommended by the
manufacturers of the appliances, accessories and pipes being jointed or bedded.
Prevent use of appliances for any purpose until Practical Completion. Do not stand on
appliances.
On completion, check for damage and defects and test for satisfactory operation.
Replace damaged or defective components and accessories. Check for, and rectify leaks.
Remove labels/stickers and clean appliances thoroughly.
3.3.1
Noggings/Bearers
Ensure that noggings, bearers, etc. required to support sanitary appliances and fittings are
accurately positioned and securely fixed.
3.3.2
Cisterns
Unless specified otherwise obtain cistern operating components from cistern manufacturer.
Ensure that ball valve matches pressure of water supply.
Fix at the height recommended by manufacturer unless otherwise specified or shown on
drawings.
Ensure that overflow pipe is fixed to falls, and located to give visible warning of discharge.
3.3.3
Taps
Fix securely, making a watertight seal with the appliance.
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Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
3.3.4
Wastes/Overflows
Bed in waterproof jointing compound and fix with resilient washer between appliance and
back nut.
3.3.5
Sealant Pointing
Sealant: Silicone based to BS 5889, Type B with fungicide.
Manufacturer and Reference: Adshead Radcliffe or similar approved.
Colour: White
4
Maintenance
It is a requirement to carry out maintenance and water testing which includes periodic risk
assessment, legionella testing and general maintenance which includes allowance for
replacement of items at welfare facilities.
4.1
General Maintenance
4.1.1
Repairs to flushing arrangements
Persistent overflow of cisterns shall be rectified by the adjustment of the float level and
replacement of the pressure washer in the cistern assembly.
Where systems contain obsolete parts that are no longer available, replacement of the entire
cistern may be necessary.
Where flushing arrangements are defective, or adjustment of float and washer replacement
is not effective, replacement of the entire flushing mechanism is recommended.
4.1.2
Repairs to appliances
Seats to WC pans shall be replaced where broken or insecure.
4.1.3
Leaks and pipe repairs
Leaking or defective pipes shall be repaired by cutting out the defective section and
installation of new section of pipe.
Leakages caused by dripping taps shall be repaired by replacement of the tap washer, or of
the entire tap where this is not practicable.
4.2
Legionella Control
Legionella control shall include temperature monitoring and low use outlet monitoring as per
EMP 07-0017 - ‘Water Temperature Testing at Operational Sites’ (internal document).
All Legionella testing and monitoring is to be undertaken by personnel with approved
evidence of training and competence at all locations where a water supply is to be
maintained.
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Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
4.3
Periodic Water Risk Assessment
A water risk assessment is required to be carried out and reviewed every two years by a
competent contractor with access to UKAS approved lab.
5
Removal of Welfare Facilities
On occasion it may be necessary to remove welfare facilities from operational Grid and
Primary substation sites where the water risk assessment identifies a persistent Legionella
bacteria presence in the system or where the system has been identified as low use and as
such could pose an increased Legionella development risk.
Where removal has been specified the following appliance and accessories shall be
removed. Should the items to be removed be in good condition, they should be retained for
refurbishment of facilities at other sites.
Removal works shall include:
Site


Locate, excavate and cap off water supply to site.
Locate, excavate and cap off foul water drains after checking the foul drains do not
service any other site use. eg. transformer bund discharge.
General









Isolate electrical supply.
Remove water heater.
Remove all water supply pipework.
Remove all soil pipework.
Make good wall area.
Make good floor area.
Remove external tap.
Remove cold water tank (if present).
Remove battery room sink.
Toilet




Remove toilet and cistern and cap foul discharge.
Remove urinal.
Remove wash hand basin.
Cap water feed pipes
Mess Room




Isolate electrical supply.
Remove kitchen sink.
Remove water heater.
Cap water feed pipes
Shower
 Isolate electrical supply (where electric shower installed
 Remove shower, cubicle and tray.
 Cap water feed pipes
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Welfare Facilities at Grid and Primary Sites
Document Number: EDS 07-0018
Version: 2.0
Date: 03/02/2016
6
References
BS 5627:1984
Specification for plastics connectors for use with horizontal outlet
vitreous china WC pans
BS 1254:1981
Specification for WC Seats
BS 1125:1987
Specification for WC Flushing Cisterns
BS 5506:1977
Specification for Wash Basins
BS 4213:1991
Specification for Cold Water Storage Cisterns
BS 5889:
Specification for silicone based building sealants
BS EN 13280
Specification for glass fibre reinforced cisterns…
BS EN 12004:2001
Adhesives for Tiles. Definitions and Specifications
BS EN 13888:2002
Grouts for Tiles. Definitions and Specifications
UK Power Networks Documents
EDS 07-0105
Grid and Primary Civil Designs Standards
EMP 07-0017
Water Temperature Testing at Operational Sites (internal document)
7
Dependent Documents
This document is referenced in the following documents, any of which may be affected by
updates.
EMP 07-0017
Water Temperature Testing at Operational Sites (internal document)
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