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If your property suffers from rising damp, waterlogged soil, or seepage through retaining walls, professional subsoil drainage is the solution. At LJM Plumbing, Gas and Drainage, we provide expert subsoil drainage systems, including agi drain installation, to protect homes and businesses across Brisbane. With over 25 years of experience, our team designs and installs systems that effectively divert excess groundwater and prevent costly structural damage.
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Trusted on the Northside for over 20 years

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Professional Subsoil Drainage Services

Subsoil drainage works by installing perforated pipes below ground level, wrapped in geofabric and surrounded by gravel, to collect and redirect water away from problem areas. This system is critical for properties built on sloping blocks, near retaining walls, or with basements vulnerable to flooding.

Our licensed plumbers deliver complete subsoil drainage solutions tailored to your site conditions. Our services include:

 

  • Site inspections and customised drainage design
  • Agi drain installation for water collection and redirection
  • Excavation and trenching with correct gradients
  • Geofabric lining to prevent soil entering the drains
  • Gravel backfilling for maximum flow efficiency
  • Integration with stormwater systems or approved discharge points

Every installation is carried out to Queensland standards, ensuring durability, compliance, and long-term performance.

Hear From Our Clients

LJM Plumbing, Gas & Drainage

4.7 out of 5 stars
Brendale Business Centre, 48/193 South Pine Road, Brendale
Tesfaye
a week ago
We have had the team out on a few occasions and cannot speak more highly about the service, always on time, cost and professionalism each time. Always being able to converse and gain best possible out...
Heather R
a week ago
I've had LJM do two non-urgent domestic jobs for me recently. All the staff have been courteous and helpful. Their prices seems reasonable and they were happy to do several quote options. Both plum...
Crystal Allen
a week ago
⭐️⭐️⭐️⭐️⭐️ 10/10 – absolute legends. Had LJM Plumbing, Gas & Drainage out today and genuinely couldn’t recommend these guys highly enough. Friendly, professional, down-to-eart...
Sandra Ferguson
3 weeks ago
Thank you Jenn and Ethan for once again providing a fast and efficient service. This time we were really in trouble and the issue was perfectly fixed by Ethan. Very much appreciated this morning., eff...

Benefits of Subsoil Drainage

Investing in subsoil drainage provides long-lasting protection for your property. Key benefits include:

 

  • Prevents water seepage through retaining walls
  • Reduces hydrostatic pressure against foundations
  • Stops rising damp and mould inside homes
  • Protects structural integrity of buildings
  • Keeps gardens, lawns, and outdoor areas free from waterlogging

Our systems are designed specifically for Brisbane’s soil conditions and rainfall patterns, giving you peace of mind even during storm season.

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Why Choose LJM Plumbing for Agi Drain Installation?

At LJM Plumbing, Gas and Drainage, we combine plumbing expertise with advanced drainage solutions. Our agi drain installation services are trusted across Brisbane because we offer:

 

  • Licensed and insured drainage specialists
  • In-house machinery including excavators and trenchers
  • 24/7 availability for urgent drainage issues
  • Transparent pricing with no hidden costs
  • Custom system designs for residential and commercial properties
  • Full compliance with Queensland building and plumbing codes

We own and operate all our equipment, so we complete projects efficiently without relying on subcontractors.

Long-Term Drainage Protection

A well-designed subsoil drainage system is one of the most effective ways to protect your property from water damage. We also combine agi drains with sump pumps, stormwater upgrades, and waterproofing solutions to deliver complete drainage protection. Our preventative approach ensures your system continues to perform, reducing the risk of costly repairs and structural damage in the future.

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Frequently Asked Questions

  • What is subsoil drainage?

    It’s a system of underground perforated pipes that redirect excess water away from problem areas such as retaining walls and building foundations.

  • When do I need subsoil drainage?

    If your property suffers from rising damp, waterlogged lawns, or seepage through retaining walls, subsoil drainage is highly recommended.

  • What is an agi drain?

    An agi drain is a perforated agricultural pipe wrapped in geofabric and gravel, used to collect and redirect groundwater.

  • Do you connect subsoil drainage to stormwater systems?

    Yes. We integrate agi drains into existing stormwater systems or approved discharge points to ensure compliance.

  • Is subsoil drainage suitable for residential and commercial sites?

    Yes. We install systems for homes, commercial properties, body corporates, and industrial facilities.

  • How long does an agi drain installation last?

    When installed correctly, these systems can provide decades of reliable performance with minimal maintenance.

  • Can you combine subsoil drainage with other solutions?

    Absolutely. We often install sump pumps, stormwater pits, and waterproofing alongside agi drains for complete protection.

    For professional subsoil drainage and reliable agi drain installation in Brisbane, contact LJM Plumbing, Gas and Drainage today. We’ll design and install a system that protects your property from water damage year-round.

Reliable Plumbing Solutions

From installation to emergency repairs, LJM Plumbing, Gas and Drainage delivers reliable, compliant, and long-lasting services across Brisbane. Contact our licensed team today for professional solutions you can trust.

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    Get In Touch

    At LJM Plumbing, Gas & Drainage, we provide fast, reliable plumbing and drainage solutions — from clearing blocked drains to flood prevention and burst pipe repairs. Contact us today and discover how our expert team can protect your property and keep your plumbing running smoothly!
    Our mission is to deliver convenient and reliable plumbing and drainage solutions, designed to keep your home or business running smoothly and problem-free.
    Get In Touch
    48/193 South Pine Road
    Brendale QLD 4500
    admin@ljmplumbing.com.au0412 267 000

    © 2025 LJM Plumbing, Gas & Drainage | All Rights Reserved | Developed byweb design brisbane

    4.7
    LJM Plumbing, Gas & Drainage
    Based on 4 reviews

    LJM Plumbing, Gas & Drainage

    4.7 out of 5 stars
    Brendale Business Centre, 48/193 South Pine Road, Brendale
    Tesfaye
    a week ago
    We have had the team out on a few occasions and cannot speak more highly about the service, always on time, cost and professionalism each time. Always being able to converse and gain best possible outcome for job required.
    Heather R
    a week ago
    I've had LJM do two non-urgent domestic jobs for me recently. All the staff have been courteous and helpful. Their prices seems reasonable and they were happy to do several quote options. Both plumbers have been happy to explain what they are doing and provide on the spot advice. I will definitely call them for my next job.
    Crystal Allen
    a week ago
    ⭐️⭐️⭐️⭐️⭐️ 10/10 – absolute legends. Had LJM Plumbing, Gas & Drainage out today and genuinely couldn’t recommend these guys highly enough. Friendly, professional, down-to-earth, explained what was happening, got stuck straight into the job and were just an all-round pleasure to have around. They even tolerated my tiny site supervisor being progressively relocated around the worksite for photographic documentation. He inspected the excavator, supervised the digging and appears satisfied with the standard of workmanship. 😂 It’s surprisingly rare to have tradies turn up and immediately make you feel comfortable and confident that the job is in good hands, but these blokes absolutely did. No drama, no nonsense, just genuinely lovely humans who clearly know what they’re doing. Five stars from me and five stars from the tiny foreman. Would absolutely call them again — although he may insist on operating the excavator next time. Thanks so much, legends! 🙌
    Sandra Ferguson
    3 weeks ago
    Thank you Jenn and Ethan for once again providing a fast and efficient service. This time we were really in trouble and the issue was perfectly fixed by Ethan. Very much appreciated this morning., efficient service. Thank you. Highly recommend this business.