Lemon
Drainage System Design in Petersfield | Commercial Drainage Installation Services
The field-based engineers at Lemon Drainage Services Ltd can facilitate a drainage system design for any commercial property in the Petersfield area. We specialise in commercial drainage services, using our skills to provide on-mains services and off-mains cesspit, septic tank and sewage treatment plant installations. Lemon is also a trusted name in the installation, maintenance and repair of pump stations.
And if you need us to empty cesspits or septic tanks, or for sewage treatment plant servicing, call to arrange a survey.
Whether you need an extra run added to a current drainage system design, or a full installation for the whole of your business property in Petersfield, we have the commercial drainage services you need. We have more than 75 years of combined team experience and plan our installations around the dispersal of surface and foul water drainage.
Lemon
Gradients
When laying underground pipes as part of a commercial drainage system design, they need to follow an average gradient or slope. Too big a slope can leave unwanted solids in a drain, and this might cause blockages. Too little a slope and you could face issues with odours or scaling.
The minimum gradient used in our commercial drainage services is 1:100 for surface water and 1:40 for foul water drainage although this changes to 1:80 if connected to a toilet.
When undertaking sewage treatment plant installations or the fitting of pump stations, criteria changes and we must base our calculations on the size of the system, the number of people living in a Petersfield property and facility usage.
The better the planning for an installation, the less often you will need to arrange sewage treatment plant servicing.
Lemon
Pipework Coverings
With the pipework laid, we proceed to cover using materials that help in preventing damage. Regulations for drainage system designs dictate that you cannot backfill pipework and leave it covered with rubble. Instead, as a part of our commercial drainage services in Petersfield, we cover pipes with granular materials, or we encase them in concrete.
The method of covering used varies based on the condition and depth of the pipework. The minimum cover over plastic drainage is 600mm for fields and gardens, and 900mm for light roads and driveways. For over-clay drainage, the figure is the same for fields and gardens, but 1,200mm for light roads.
Sewage treatment plant installations use a gradual gravity feed to discharge effluent and have underground pipework included during fitting. Pumps stations also have pipework. Both will have cables to provide an electrical supply.
When undertaking sewage treatment plant servicing or the maintenance of pump stations in Petersfield, we make sure that pipework is cleared of materials which could cause blockages.
Manhole Chambers
To facilitate new drainage system designs, Lemon can integrate manhole chambers to ensure your on-mains system is accessible and allows for maintenance in the future. Also referred to as inspection chambers, manholes traditionally provide access to underground facilities and sewer systems. We build them at access points or where gradients and directions change.
With a reputation that spans far beyond Petersfield and into the surrounding South East area, Lemon is the name to choose for on-mains and off-mains commercial drainage services.