Drain Tracing & Connectivity Surveys

If you don't know exactly where your drains run, what connects into what, or which line is causing the problem, you end up paying for reactive call-outs without ever fixing the root cause.

ICE Drainage provides drain tracing and connectivity surveys across London and the Home Counties, helping hospitality groups, facilities management teams, property managers, schools, retail sites, and commercial landlords understand their drainage network.

Whether you're dealing with repeat blockages, planning refurbishment work, or managing a multi-tenant site, we'll help you confirm drain routes, connection points, flow direction, and asset locations so you can make confident decisions.

What is drain tracing, and why does it matter?

Drain tracing identifies where drains run underground, which appliances or areas connect into which lines, where inspection chambers and access points are located, and how the network flows, including where it's most vulnerable.

On commercial sites, drainage layouts are often unclear because of historic alterations and extensions, multiple fit-outs, especially in hospitality, poor or missing as-built drawings, shared drainage between units, and changes of use over time.

A connectivity survey gives you the evidence you need to stop guessing.

When you need a drain tracing and connectivity survey

Drain tracing is particularly useful if you're experiencing recurring blockages with no obvious source, odours that return quickly after cleaning, foul flooding or backing up at peak times, confusion about which tenant or unit is connected to a line, a suspected misconnection between foul and surface water systems, a need to locate assets before planned works, or a requirement to build a maintenance plan for high-risk lines.

It's also a smart step before major refurbishments, kitchen upgrades, or drainage remedial work.

What's included in a connectivity survey?

Every site is different, but our surveys typically focus on confirming drain routes between key access points, identifying connection points from kitchens, WCs, plant rooms, and external gullies, establishing flow direction and potential bottlenecks, highlighting areas prone to grease build-up, silt accumulation, or restrictions, and producing clear findings with next-step recommendations.

If it would help, we can also advise on access improvements, such as additional chambers or rodding points, to make future maintenance easier and cheaper.

Our drain tracing process

We keep the process practical, safe, and low on disruption.

1) Site review and objective setting

We confirm what you need from the survey, whether that's finding the cause of a recurring issue, mapping a drainage network for FM purposes, confirming connectivity for a specific area such as a kitchen line, or supporting planned works or remedials.

2) Access point inspection

We inspect manholes and inspection chambers to understand flow behaviour and signs of surcharge, grease or sludge patterns that point to an upstream source, and where the evidence suggests the issue is entering the network.

3) Dye testing and tracing

Where appropriate, dye tracing confirms where a specific drain run discharges. It's especially useful on multi-tenant sites, older buildings with unclear layouts, and hospitality sites with multiple waste streams.

4) CCTV drainage survey

Where access allows, CCTV helps confirm junctions and tie-ins, connection points and layout, structural defects such as cracks, deformation, or displacement, and restrictions from grease, scale, debris, or silt.

5) Findings and recommendations

You'll receive clear outcomes, typically including confirmed connectivity and likely drain routes, identified problem areas and root causes, recommended remedial work if needed, and maintenance recommendations to reduce repeat incidents.

Common problems drain tracing helps resolve

Drain tracing is often the missing piece when you're dealing with commercial kitchen blockages caused by grease entering the wrong line, repeat jetting with no lasting improvement, odours around specific chambers with no clear source, shared drainage disputes between tenants, unknown connections after refurbishments, or surface water and foul cross-connections causing unexpected loading.

Drain tracing for facilities management teams

For FM teams, connectivity surveys support better planned maintenance and budgeting, faster diagnosis during reactive incidents, reduced downtime and fewer emergency call-outs, clearer responsibility mapping on multi-tenant sites, and better contractor management, since everyone works from the same evidence.

If you manage multiple sites, we can help you standardise how drainage assets are understood and maintained.