Connecting to main sewer

In areas around Hampshire and Surrey many homes are still not connected to the mains and rely on septic tanks, cesspits or soakaways. This client contacted us to install a rising main and connection to a Southern Water manhole.

In order to connect to the mains, access to the sewer system must be close enough and have the appropriate ‘fall’.  If the mains sewer is within the range set out in the ‘general binding rules’ created in January 2020, connecting to the main public sewer is option.  If you do not have the correct gravity fall, you may be able to install a pumping station and rising main to pump the waste to the main sewage system.

 

What is a rising main?

A rising main is a type of drain or sewer which conveys foul sewage, surface water runoff or storm water from a pumping station to join with the main sewerage system or sewage treatment plant.

The pressurised pipeline system discharges the waste into a gravity manhole. From here the cycle begins again until the sewage reaches its point of destination—typically a treatment plant.

Sewer connection

Sewer connections can be made directly to a public sewer or indirectly to a private drain that in turn discharges to a public sewer. If you plan to connect to the main sewer you will require consent from your local water authority.  The local water authority are legally bound to ensure that any drainage works are carried out safely to ensure there are no issues with sewer flooding or pollution. They will assess the proposed connection and carry out an inspection on completion of the works. Our drainage team have years’ experience working with local authorities for public sewer connections to help ensure your project complies to regulations. We can help you from start to finish, identifying where your nearest sewer is, liaising with your local public water authority to organise your sewer mains connection and installing a raising main and pump station.

 

Packaged pump station

When the ‘fall’ is not sufficient to connect to a mains system, a pump station is required to pump the waste under pressure. At Alton Pump Services we can help select the most appropriate pump station for your application.  Our drainage team will assess:

• Location
• Inlet depth
• How many buildings will be served by the pump station
• The volume of waste that will be removed
• The viscosity of the liquid
• Inlet depth – what is the lift and how far will the waste be pumped?

Packaged pump stations can be used for both foul water (sewage) and surface water applications.

Wastewater from the site flows into an underground storage chamber, where the pump station provides pressure to increase the flow rate and pump the water to the main sewer.

 

Job Specification

• Install a rising main and connection to Southern Water
• Install packaged pump station including pumps, panel, floats, brackets, chain/shackles
• Commission packaged pump station

Pump Specification

HCP F21P Submersible pump for sewage water.

• 1 phase
• Without auto float switch

Features

• A precision manufactured motor is achieved by utilising the highest standard of quality control.
• All rotors adopt heat treatment methods for drive shaft assembling.
• Stator winding impregnated with varnish that is heat dried in an industrial oven.
• Standard accessories include : cable with an epoxy resin sealed water resistant cable base, Auto-cut thermal motor protector, dual mechanical seals and lip seal design.

Applications

• Drainage of sewage from the building basements, hotel industry, and waste water from factories
• Drainage of sewage from industrial process factories
• Emptying of septic tanks, cesspits and sewage pump stations.
• Pumping surface and drainage water from garages and sprinkler systems.

 

Alton Pump Services have a team of experienced drainage engineers that are experts in the installation of pumping stations and rising mains. If you need professional assistance with your drainage system, get in touch on 01420 561661