Commercial Drain Installation

New commercial drainage is a different discipline from domestic: larger diameters, adoptable standards, interceptors, attenuation and inspection regimes all come into play.

From a new pub kitchen's foul run to full site drainage for a unit development, WaterTrust contractors install to Building Regs Part H and sewer-adoption standards.

Post your commercial drain installation job — free

Vetted contractors only · up to 4 quotes · your details stay private until matched.

What the work involves

• Excavation and laying of foul and surface water systems
• Manholes, inspection chambers, gullies and channel drains
• Grease management and petrol/oil interceptors where required
• Air/water testing and CCTV proof of the finished system

When you need it

• A new build, extension or change of use needing drainage
• Replacing an undersized or failed commercial system
• Separating combined foul and surface systems
• Connecting a site to the public sewer (Section 106)

Commercial Drain Installation — common questions

Do we need a sewer connection application?

Any new connection to a public sewer needs the sewerage company's approval (a Section 106 application) — your contractor prepares the connection to pass inspection.

What falls under Part H?

Building Regulations Part H governs foul and surface water drainage design — falls, access points, ventilation and materials. Compliance is baked into the installation.

Can you work around a trading business?

Phased digs, temporary connections and out-of-hours work are all normal — describe your constraints in the job post.

Ready to get quotes?

Post the job free — approved contractors across the UK see it straight away.