New Foul Drainage Systems

Foul drainage is the system that carries wastewater from toilets, washrooms, kitchens, and plant areas safely away from your building. When a foul drainage system is poorly designed, undersized, damaged, or simply outdated, the result is usually the same: repeat blockages, unpleasant odours, flooding, and disruption to your operation.

ICE Drainage installs new foul drainage systems across London and the Home Counties, supporting hospitality venues, commercial buildings, and facilities management teams. We deliver installations and upgrades built for reliability, easy maintenance, and minimal disruption.

What is a foul drainage system?

A foul drainage system carries wastewater that contains contaminants, unlike surface water or rainwater. On commercial sites, this typically includes discharge from toilets and urinals, basins and washrooms, showers and staff facilities, commercial kitchens and back-of-house areas, and plant rooms and equipment, depending on the site.

A foul system normally includes internal soil and waste pipework, underground foul drainage pipe runs, manholes and inspection chambers for access, and connections to the public sewer or on-site treatment where applicable. The key is making sure the system is designed for real-world usage and stays serviceable for future maintenance.

When do you need a new foul drainage system?

You may need a new system if you're:

Building a new commercial unit or extension
Refurbishing washrooms or adding new facilities
Upgrading a commercial kitchen
Changing the use of a property, with increased occupancy or higher demand
Dealing with repeated blockages caused by poor layout or pipe condition
Experiencing foul flooding or persistent odours
Facing structural defects such as cracked, displaced, or collapsed pipes

For hospitality and FM-managed sites, a new system is often the most cost-effective way to reduce ongoing reactive call-outs.

Why quick fixes often fail

We're often called in after repeated unblocking work that hasn't solved the underlying problem. Common causes include:

Poor gradients causing standing water and debris build-up
Undersized pipework for the level of usage
Not enough manholes or inspection chambers for proper access
Defective benching in chambers that snags solids
Root ingress at joints and connections
Damaged or displaced pipework
Fat, oil, and grease impacting kitchen waste lines

If the system is fundamentally flawed, installing a new foul drainage run, or redesigning key sections, is usually more reliable than ongoing patch repairs.

Our new foul drainage installation services

We support commercial clients with new installations, alterations, and replacements.

New underground foul drainage pipework

We install new foul drainage pipe runs to the correct line and level, including new connections from buildings to chambers or outfalls, replacement of failed or unsuitable sections, and diversions or re-routing for refurbishments.

Manholes and inspection chambers

A foul drainage system is only as maintainable as its access points. We can install or upgrade new manholes and inspection chambers, improve chamber benching, and upgrade covers and frames where required.

Alterations for refurbishments and change of use

If you're adding toilets, increasing capacity, or changing layouts, we can alter the foul drainage to suit the new demand and reduce future issues.

Investigation and design support

If the route, condition, or cause of a failure isn't clear, we can investigate first, checking existing access points, identifying restrictions and defects, and carrying out a CCTV survey where needed to confirm pipe condition and layout. This helps make sure the new system is targeted and avoids unnecessary excavation.

Foul drainage for hospitality and commercial kitchens

Hospitality sites often place extra demand on foul and waste systems, due to high occupancy and peak usage periods, commercial kitchen discharge, and tight operational windows for disruptive work. We plan installations to minimise downtime, and we'll advise on practical measures that reduce the risk of blockages, including access planning and maintenance considerations.

Minimising disruption on live commercial sites

Foul drainage installation can involve excavation and coordination both inside and outside the building. We're used to working around guest experience and customer footfall, delivery schedules and loading bay access, permit-to-work processes on managed sites, and out-of-hours windows where required. Our focus is safe working, clear communication, and getting you back to normal operations quickly.

Reporting, evidence, and handover

For FM teams and commercial stakeholders, we can provide clear scope and completion notes, photographic evidence where required, and practical recommendations for ongoing maintenance. This supports approvals, compliance records, and long-term asset management.

Why choose ICE Drainage?

A commercial-first drainage contractor for hospitality and FM
Coverage across London and the Home Counties
Reactive and planned capability, from investigation through to installation
A focus on maintainability, including access, flow, and reducing repeat incidents
Credentials including Safe Contractor, SSSTS, and Constructionline Gold

ICE Drainage is a specialist service expansion of ICE Cleaning, a leading sewage cleaning company in the UK.