Drainage Services

Drain Unblocking and High-Pressure Jetting

We clear blocked drains, toilets, sinks and basins to restore water flow and minimise disruption to your property. Our team selects an appropriate clearance method, including high-pressure jetting where suitable, to remove deposits and obstructions. Where blockages return, we can investigate further to identify the underlying cause.

CCTV Surveys and Drainage Investigations

Our drainage investigations help identify the causes of recurring blockages, unpleasant odours, root intrusion and surface water problems. CCTV surveys allow us to inspect internal pipework and locate defects that may not be visible from the surface. The findings guide recommendations for cleaning, repairs or further assessment.

Drain Repairs, Relining and Installation

We repair and replace damaged drainage pipework and offer relining where the existing pipe’s condition makes it suitable. Our services also include new drainage installations and upgrades to existing systems. Work is planned around your property’s layout, access requirements and any other contractors involved.

Drainage Pumps and Tanks

We support drainage pumping systems and tanks serving commercial properties and larger developments. Our team assesses the equipment, reported faults and operating requirements to establish the appropriate maintenance or remedial work. Sharing system details and previous service records helps us understand your installation and plan the next steps.

Planned Drainage Maintenance

Our planned maintenance programmes combine scheduled inspections, cleaning and jetting to help address developing restrictions before they cause disruption. The scope and frequency are tailored to your building’s usage, system condition and previous drainage problems. This gives property and facilities managers a more organised approach to ongoing drainage care.

Drainage requirements vary with building use, occupancy and operating hours. Our services can address the following types of requirements, with the exact scope agreed for each site:

• Commercial offices: Drainage serving staff toilets, kitchens and shared facilities.
• Hospitality and restaurants: Kitchen and guest-facility drainage, with work planned around service periods.
• Healthcare premises: Drainage work requiring careful consideration of hygiene, controlled access and essential facilities.
• Retail premises: Customer toilets, staff amenities and communal systems within stores and shopping developments.
• Industrial buildings and warehouses: Extensive pipework and external drainage; specialist process effluent requirements should be discussed separately.
• Residential blocks and mixed-use developments: Shared drainage requiring coordination with residents, occupiers and managing agents.
• Construction and refurbishment sites: Investigations, installations and remedial work coordinated with the project programme.

PHD Mechanical provides professional drainage services across London and the South East, supporting the needs of commercial premises, healthcare facilities, hospitality venues and industrial buildings. With 125 years of combined building services experience, our in-house specialists handle everything from blocked drains and toilets to complex pipework, drainage tanks and pumping systems, with solutions tailored to each property’s requirements.

We combine reactive assistance with planned preventative maintenance to resolve urgent faults and help reduce recurring problems. Available 24 hours a day, seven days a week, 365 days a year, our team works to keep essential facilities operational while minimising disruption to staff, customers and building occupants.

Can you coordinate drainage work with our construction programme?

Yes. PHD Mechanical’s commercial drainage approach includes coordination with contractors, property managers and building owners. Provide your scope, available drawings, programme and access restrictions so the team can assess delivery requirements and agree suitable dates.

What should contractors include when requesting a quotation?

Include the site address, proposed work, drainage drawings or surveys, and required completion dates. Specify any procurement requirements, including accreditation evidence, insurance, RAMS and handover documentation, so these can be confirmed before appointment.

Should facilities managers choose reactive support or planned maintenance?

Reactive support addresses existing faults, while planned maintenance schedules inspections and cleaning to help prevent disruption. Many buildings benefit from both, with routine maintenance supported by access to assistance when unexpected problems occur.

Can facilities teams receive documentation for completed work?

PHD Mechanical states that it provides documentation for commercial plumbing work, including drainage services, to support records and audits. Confirm the required deliverables when booking, especially CCTV footage, survey findings, photographs or repair recommendations.

Which areas do you cover, and are you available outside normal hours?

We serve London and the South East and offer 24/7 support. Contact us with your postcode and fault details to confirm attendance arrangements. An estimated arrival time should be requested when booking.

How much do commercial drainage services cost?

Costs depend on the problem, access, equipment and work required. Request a quotation or confirmation of the charging basis before booking, including out-of-hours charges and VAT. Ask whether the initial attendance covers investigation, clearance or both.