Our services

Our complete range of septic tank services include:

  • Septic tank installation and replacement – tailored solutions for new systems, replacement tanks, and upgrades.
  • Routine emptying and de-sludging – helping systems operate efficiently and preventing blockages or overflows.
  • Cleaning and inspections – professional assessments to support compliance and long-term performance.
  • Maintenance and repairs – resolving issues quickly to reduce the risk of system failure and disruption.

Our experienced engineers use modern equipment and proven installation methods to deliver reliable, compliant wastewater solutions for domestic and commercial properties.

Installation process

Our septic tank installation and replacement process is carefully managed from start to finish:

  • Site assessment and design – evaluating soil conditions, property requirements, and wastewater demands to determine the most suitable solution.
  • System planning – designing the tank, drainage field, and associated pipework in line with environmental regulations.
  • Excavation and installation – preparing the site, installing the system, connecting drainage, and carrying out testing.
  • Handover and guidance – ensuring the system is operating correctly and providing advice on ongoing maintenance and servicing.
    Who we work with

Our septic tank services are trusted by:

  • Domestic homeowners and rural properties
  • Commercial sites and businesses

Learn more about the sectors we serve [link to dedicated sectors page].

Why choose Shanahan Contracting Ltd

  • Experienced, local engineers with specialist wastewater expertise
  • Fully licensed, insured, and compliant with environmental regulations
  • Complete end-to-end service for installation, replacement, maintenance, and emptying
  • Reliable solutions tailored to your property or business

If you need septic tank installation, replacement, servicing, or maintenance, contact our team to discuss your requirements or arrange a site visit.

Request a quote for Septic tank services & replacement

Our other services

Testimonials

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  • “Shanahan’s has taken care of all our drain cleansing, jetting & repairs for over 10 years, also assisting us with any groundworks we need. They always provide a prompt & professional service. The teams knowledge of our site pays dividends & their experience helps to keep the centre’s complex drainage network running”

    Jack Garden Square Shopping Centre - Letchworth

  • To empty Septic tanks . First class service from first contact to removal within 24 hours . Very knowledgable , helpful company . Would highly recommend .

    Julie - Hertfordshire

  • Just a quick thank you for your help in sorting our drainage issue and for the outstanding service provided by Michael yesterday, he is a real credit to your business.

    Standalone Farm - Letchworth

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