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Trade Specifications

tagged "Plumbing and Heating"

The following Trade Specifications must be read in conjunction with all other Contract documentation including; Tender Letter, General Terms, Conditions of Contract for Works, Labour Only and Purchase Orders, General Construction Notes (England & Wales), Suppliers and Sub Contract Works - Customer Charter and the Company's Occupational Safety, Health & Environmental Management System.

Our aim is to enable our sub-contractors and suppliers to access key Commercial information such as Terms & Conditions, Trade Specification, etc. online as soon as they are updated and revised. We hope that this will ensure that our supply chain is always fully informed as quickly as possible.

Whilst available online, this information is also available from the Commercial Departments at our Divisional offices and will form part of any contract we place (as set out in the Order).

Please be aware that bogus web sites seeking fees for the chance of working with major contractors exist.

Jon Hayward
Senior Group Commercial Manager

Plumbing and Heating

Revision AP 01.07.2021

Following the recent change in Shower and Gas Boiler Specifications/Heating and Plumbing Designs;

General Item g) Group Suppliers – Note added against Electric Showers "ONLY where required by a Registered Social Landlord (RSL)"

Twyford replaced with Geberit.

General Item h) Health & Safety. The Contractor's attention is drawn to the Health and Safety section of this Plumbing & Heating Trade Specification which has been re-written in accordance with Group Health & Safety requirements.

Section 1.12 – Reference to Statesman specification deleted.

Section 4.6 – where pipe work runs are located within timber stud partitions and / or bulkheads, the pipe work is to be protected within the wall construction with a metal plate to prevent plasterboard fixing screws penetrating the pipe work.

Section 15.1 – reference to silicone polymer mastic added. There is no requirement to install a horizontal marine plywood base between the shower tray and the chipboard floor.

Section 18.4 – specification added with reference to the commissioning of a Barratt / DWH plot central heating system, an ADEY ProCheck® (ADEY CODE CP1-03-05132) test should be used to test and record the concentration of inhibitor and cleanliness of system water.

Section 22 – the Contractor's attention is drawn to the Waste Removal & Cleaning Out section of this Plumbing and Heating Trade Specification which has been re-written in accordance with Group Health & Safety requirements.

Revision AO 01.08.2020

h) Health & Safety

All Electrical equipment, which is being used on site, is required to be PAT tested in accordance with current legislation.

Leadwork section deleted and added to Roof Tiler trade specification.

22. Schedule of Materials

Cleaning and Commissioning Products updated with the current Adey specification.

Supplier details have been updated for Electric showers.

Revision AN 20.09.2019

Section 2.9 has been update to include the requirement that Boiler and Flue Chimneys must be sealed into walls using the manufacturers internal seal provided.

Section 20.5 Unvented Hot Water Cylinder – has been updated in line with Kingspan specification which now includes the fitting
of non-dynamic pressure reducing valves should the cold water mains kinetic pressure exceed 3.0bar.

Updated Section 23. Schedule of Materials – Heating Controls updated with latest product references and descriptions. Adey
Innovation Limited has been added to the list of Group Suppliers for cleaning and commissioning products.

Revision AM 01.01.2019

Minor changes to formatting, bullet numbering and supplier information.

Revision AL 01.01.2018

10.3 New – All gutter brackets to be installed at 600mm centres maximum.

18.5 New - The locations of rodding access points are to be provided at 3 storey intervals or less and above the spillover levels of appliances as per approved document H.

Revision AK 01.07.2017

Added to section f) All works to be carried out in accordance with water supply (water fittings) regulations 1999 section 73 (1) outlines the requirement of any property to prevent any system which causes or is likely to cause contamination from being connected to a water supply.

Item 2.9 amended. Boiler flues must not be sealed into walls, ceilings or floors with mastic, plaster or cement or any compound that hinders movement of the flue. The only instance that a flue is sealed is where a conventional boiler is connected to a concentric flue exiting a masonry wall to be sealed with a non-setting mastic.

Item 15.2 amended all ground floor radiators are to be fitted with a lock shield drain off radiator valve and/or Thermostatic/Wheel head valve as shown on the heating consultant design drawingsTRV's can be fitted vertically or horizontally depending on space issues encountered. All other radiators are to be fitted with a lock shield valve and/or Thermostatic/Wheel head valve, again as shown on the heating consultant design drawings.

Item 20.8 amended First fix soil stack test certificate, due to NHBC request.