---
title: "WP6101 - Water Treatment for LTHW and CHW Closed Loop Systems - Intrusive surveys (Terminal 2)"
ocid: "ocds-b5fd17-42cdd568-d850-4e6e-a899-db30f7232116"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-42cdd568-d850-4e6e-a899-db30f7232116"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-42cdd568-d850-4e6e-a899-db30f7232116.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-42cdd568-d850-4e6e-a899-db30f7232116.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-b5fd17-42cdd568-d850-4e6e-a899-db30f7232116

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## Summary

The procurement process, managed by Costain Limited (H7-Heathrow), focuses on intrusive surveys for water treatment systems at Terminal 2, Heathrow. This tender, titled "WP6101 - Water Treatment for LTHW and CHW Closed Loop Systems - Intrusive surveys", falls under the "Drinking-water treatment plant construction work" category, with an emphasis on engineering design services and project preparation. The procurement stage is currently the Tender stage, with critical deadlines around the tender period ending on 22nd October 2025. Situated in London, UK, the contract period is scheduled from 8th January 2026 to 31st October 2026, with a contract value estimated between £150,000 and £250,000.

This tender offers significant business growth opportunities for firms specializing in water treatment and engineering design services. Small and medium enterprises (SMEs) and voluntary, community, and social enterprises (VCSEs) are particularly suited to this contract, as the suitability criteria are inclusive of such organisations. The focus on asset condition surveys and potential design preparation allows businesses to showcase their expertise in non-intrusive assessments and innovative solutions within the water treatment sector. Additionally, companies skilled in handling pressurisation units, air vents, and associated systems could effectively leverage this opportunity to strengthen and expand their service portfolios.

## 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/c58c4273-a615-4076-9118-e3a73fefda01 |
| 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 | 8 Jan 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 08:00 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/c58c4273-a615-4076-9118-e3a73fefda01

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/c58c4273-a615-4076-9118-e3a73fefda01
  16th October 2025 - Opportunity notice on Contracts Finder
- https://www.competefor.com/business/viewOpportunityDetailsSupplier.html?id=101241215
  Please follow this link to view the notice.

## Provenance

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