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From Septic to Sewer in Blenheim

A SEWER CONNECTION DESIGN FOR A BLENHEIM HOME

An established Blenheim home relied on an ageing septic tank and soakage field, with a public sewer now available nearby. The homeowner needed a practical replacement solution.

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The existing system showed signs of stress and there was limited space for a compliant replacement land application area. We assessed a public sewer connection as an alternative to installing another onsite system.

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RISEN reviewed the site, Council records and available service information, then completed a topographic survey to confirm whether a gravity sewer connection was achievable.

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A route was developed through the property and road corridor, allowing for existing stormwater, power and communications services. The design specified a 100 mm private sewer lateral to the public main, with construction notes, reinstatement requirements and provisions for decommissioning the septic system.

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RISEN reviewed contractor pricing, comparing the proposed scope, construction approach and overall value. This helped the homeowner understand the work involved and make an informed decision before construction.

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THE OUTCOME

A coordinated design and construction plan intended to:

  • remove reliance on an ageing onsite system

  • reduce future maintenance

  • make use of existing public infrastructure

  • provide a reliable wastewater connection for the property

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SERVICES PROVIDED

Site investigation, topographic survey, wastewater design, Council approval support, contractor pricing review and construction planning.

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Need help with a septic or sewer connection in Marlborough?


Talk with RISEN about your property, the available options and the support you need.

© RISEN Consulting 2026

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