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

Amounts and figures

Description

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)

Official publications

• WP3340- Road Marking
  Published: 10 December 2025
• WP4730 - Security Fencing CTA Tunnel
  Published: 31 October 2025
• WP3380- Hard Landscaping (lot 1), Soft Landscaping (lot 2), & Kerb modifications (lot 3) and edge protection - CTA Main Works
  Published: 31 October 2025
• WP4730 - Security Fencing CTA Tunnel
  Published: 31 October 2025
• WP3380- Hard Landscaping (lot 1), Soft Landscaping (lot 2), & Kerb modifications (lot 3) and edge protection - CTA Main Works
  Published: 31 October 2025
• WP3380- Hard Landscaping (lot 1), Soft Landscaping (lot 2), & Kerb modifications (lot 3) and edge protection - CTA Main Works
  Published: 31 October 2025
• WP3350-Sacrificial Anode Concrete Repairs
  Published: 21 October 2025
• WP3370-Drainage Works - CTA Main Works
  Published: 21 October 2025
• WP3360-Bollards Installation Works - CTA Main Works
  Published: 21 October 2025
• WP6102 - Water Treatment for Cooling Towers - intrusive survey & design (All Terminals)
  Published: 16 October 2025

Previous and next from Costain Limited (H7-Heathrow)

• WP2910 - At Height Safety Survey & Design — 16 October 2025
• WP6102 - Water Treatment for Cooling Towers - intrusive survey & design (All Terminals) — 16 October 2025
• WP6101 - Water Treatment for LTHW and CHW Closed Loop Systems - Intrusive surveys (Terminal 2) — 16 October 2025
• WP6931 - MEP - T2 Space Optimization - Landside — 15 October 2025
• WP4981 - Architectural & Fitout - T2 Space Optimisation - Landside — 15 October 2025
• WP4990 CTA Rail Fire Compartmentation - STAGE 1 — 25 March 2024

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Frequently asked questions

What is the deadline to bid for this tender?

The submission deadline is 22 October 2025, 21:34. Check the official source, as dates can be modified.

What is the estimated value of this tender?

The estimated value published by the buyer is £250,000.

Who is the buyer of this tender?

The contracting authority is Costain Limited (H7-Heathrow) (United Kingdom).

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