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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  • 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

  • Today believe it or not I had the privilege of having my sceptic tank emptied by a Clive from Shanahan’s Strange as it may sound as it’s not a procedure I warm to but in this case it was a necessity! Firstly initial contact with the company who immediately recognised my dilemma and gave me the next available appointment at 7.30am the next day Then on time came CLIVE huge tanker and all, down our narrow drive. Twice he had to reverse some 60 yard to let neighbours get to work and an to an emergency dental appointment Once set up he emptied the tank only to find the soil pipe was blocked, to cut a long story short he sucked, blew, sucked again and eventually power jetted the blockage away (mechanically) that is staying nearly an hour in the process In this day and age people are quick to moan and complain and seldom, give praise but rest assured in Clive you have a real gem. Nothing is too much trouble. Amazon always ask How was your delivery? How many stars, was it on time, respect of property etc etc, but NEVER have I ticked the above and beyond but with Clive that box if there was such a box I would tick it. Well done and a big thank you to Clive

    Richard Aston - Hertfordshire

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