---
title: "WP6101 - Water Treatment for LTHW and CHW Closed Loop Systems - Intrusive surveys (Terminal 2)"
ocid: "ocds-b5fd17-4291aed8-fbf3-4f42-92bc-ffd0cc9e2495"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-4291aed8-fbf3-4f42-92bc-ffd0cc9e2495"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-4291aed8-fbf3-4f42-92bc-ffd0cc9e2495.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-4291aed8-fbf3-4f42-92bc-ffd0cc9e2495.json"
source: "Contracts Finder"
current_stage: "Tender"
buyer: "COSTAIN LIMITED (H7-HEATHROW)"
published: "2025-10-16"
---

# WP6101 - Water Treatment for LTHW and CHW Closed Loop Systems - Intrusive surveys (Terminal 2)

Buyer: COSTAIN LIMITED (H7-HEATHROW)  
Current stage: Tender  
OCID: ocds-b5fd17-4291aed8-fbf3-4f42-92bc-ffd0cc9e2495

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## Summary

The public procurement process for "WP6101 - Water Treatment for LTHW and CHW Closed Loop Systems - Intrusive surveys (Terminal 2)" is initiated by Costain Limited (H7-Heathrow). This tender involves conducting intrusive surveys to assess the condition of assets related to Secondary Chilled Water and Low Temperature Hot Water systems, specifically targeting Pressurisation Units and Automatic Air Vents. The procurement relates to the industry category of water treatment plant construction within the services domain and is part of active tendering. Located in London, United Kingdom, the process's tender stage began with a publication date of 16th October 2025, and proposals are expected by the tender period end date of 22nd October 2025.

This tender offers significant opportunities for business growth, particularly for small and medium enterprises (SMEs) and voluntary community social enterprises (VCSEs) specialising in engineering design, project cost estimation, and construction work related to water treatment facilities. Given the contract's estimated value of £250,000 and its relevance to both drinking water and wastewater treatment plant construction, businesses operating in the environmental and construction sectors are well-suited to compete. The procurement method encourages innovative solutions and expertise in surface water treatment, aligning with the strategic needs of Costain Limited and potentially opening pathways for further collaborations.

## Notice

This scope covers intrusive surveys to determine the condition of assets on the Secondary Chilled Water (CHW) and Low temperature hot water (LTHW) systems, specifically the Pressurisation Units (PUs) and Automatic Air Vents (AAVs). Whilst surveying advise on recommended repairs or replacement of other faulty assets via non-intrusive survey (e.g. Dosing Pots, Side Stream Filters, Buffer Vessels and Pumpsets)

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/cc56f8f0-4526-4251-b9cb-c70c96521c65 |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | SME, VCSE |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 16 Oct 2025 |
| Submission deadline | 22 Oct 2025 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 31 Mar 2026 - 31 Oct 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £250,000 |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Active |
| Lots status | Not specified |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | COSTAIN LIMITED (H7-HEATHROW) |
| Locality | MAIDENHEAD |
| Post town | Slough |
| Postcode | SL6 4UB |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 | TLJ15 Berkshire East |
| Local authority | Windsor and Maidenhead |
| Electoral ward | Oldfield |
| Westminster constituency | Maidenhead |
| Delivery location | TLI London |

## CPV Codes

### Divisions

- 22 - Printed matter and related products
- 34 - Transport equipment and auxiliary products to transportation
- 45 - Construction work
- 71 - Architectural, construction, engineering and inspection services
- 90 - Sewage, refuse, cleaning and environmental services

### Codes

- 22314000 - Designs
- 34632100 - Mechanical signalling
- 45252126 - Drinking-water treatment plant construction work
- 45252127 - Wastewater treatment plant construction work
- 71242000 - Project and design preparation, estimation of costs
- 71320000 - Engineering design services
- 90733400 - Surface water treatment services

## Release History

- 16 Oct 2025 at 08:10 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/cc56f8f0-4526-4251-b9cb-c70c96521c65

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/cc56f8f0-4526-4251-b9cb-c70c96521c65
  16th October 2025 - Opportunity notice on Contracts Finder
- https://www.competefor.com/business/viewOpportunityDetailsSupplier.html?id=101241064
  Please follow this link to view the notice.

## Provenance

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