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Large modern septic tank unit positioned in excavation trench for installation

Septic tank & sewage treatment plant installations in Devon & Somerset

Help to choose the right system. Full installation and commissioning. Compliance considered from day one.

What sets us apart

Septic tank installations

Professional fitting of underground tanks, treatment plants, and drainage fields compliant with environmental regulations.

System choice and commissioning

Selecting suitable wastewater units based on ground conditions and completing full operational testing post-installation.

Suitable for homes and development sites

Off-mains drainage infrastructure tailored for residential properties, agricultural holdings, and commercial building developments.

A new system that suits your property

If you need a new septic tank or sewage treatment plant, we help you choose the right setup for your property, then install and commission it properly from the start. Ground conditions, property use and discharge needs all matter, because the wrong choice can lead to avoidable disruption and extra cost later on. We handle installations at Spirebourne Ltd with a practical approach that keeps the job clear and straightforward. We know that a replacement or first-time install often comes with questions about access, compliance and long-term upkeep. That's why we focus on a system that works for your site, your usage and the way you need it to perform.

Ribbed black plastic sewage treatment tank placed in ground trench
Groundworkers installing concrete drainage riser rings with excavator nearby

How we carry out the installation

From the first conversation, we look at what your property needs before any installation begins. We then plan the work, so your new unit is fitted, connected and commissioned in the right order. Our trained engineers work with safety and environmental standards in mind throughout the job. We understand how important it is to get these essential systems right. Once everything is in place, you can move forward knowing your wastewater setup has been properly put into service.

Why proper installation matters

A correctly installed wastewater system helps you avoid drainage issues, poor performance and unnecessary repair costs later. It also gives you a clearer starting point for future servicing and maintenance. Good installation work supports safe operation on site and helps the system perform as intended from day one. In a place like Somerset, that kind of solid groundwork makes a real difference over time.

 

Septic tanks, sewage treatment plants, cesspits, cesspools and interceptors, both domestic and commercial, require regular emptying, cleaning and servicing to maintain efficient function. Spirebourne Ltd has years of experience in these services.

Our septic tank services:

  • Special waste treatment and disposal

  • Installation of new septic tanks and sewage treatment systems

  • Pump installation and servicing

  • Sewage removal

  • Gully emptying and drain blockage clearance

  • Tank cleaning

  • High-pressure water jetting

About Mantair septic tank conversion units

These units are designed to be installed within existing septic tanks or cesspools, effectively converting the existing tank into a small sewage treatment system. Mantair septic tank conversion units are suitable for locations where mains drainage is not available and where an existing septic tank or cesspool is present. Contact us for a free no-obligation quote today!

Frequently asked questions

Looking to talk through your new system?

Speak with us to discuss septic tank & sewage treatment plant installations.

Contact us

Spirebourne Ltd

The Offices, Witheridge,

Tiverton, EX16 8PZ

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Business hours

Monday – Friday: 08:30 - 17:30

Saturday – Sunday: Closed

SPIREBOURNE LIMITED, registered as a limited company in England and Wales under company number: 01499189.


Registered Company Address: The Clovelly Suite, 1 Enterprise Road, Barnstaple, Devon, EX31 3YB.

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