Tree Roots Blocking Pipes: Effective Pool Area Solutions

Your pool area may look beautiful, but if you’re dealing with frequent drain backups nearby, it can be frustrating. In the Sutherland Shire and southern Sydney, our investigations using advanced camera technology in blocked sewer or stormwater lines close to pools often reveal that invasive tree roots have penetrated the joints of older pipework.

Resolving a blocked pool drain doesn’t always mean you need to lift pavers or excavate your garden. This article explores the causes of blockages, the techniques we use to identify them, and how pipe relining offers an effective solution by repairing the issue from within the pipe itself.

What Types of Drainage Systems Are Beneath Your Backyard Pool?

In many backyard pools across Sydney, the surrounding areas are typically covered with paving, tiles, decking, retaining walls, and garden beds. Beneath this hardscape, you will generally encounter several drainage lines:

• The household sewer line
• Stormwater drainage systems that originate from the roof, paving, and pool surroundings
• The pool backwash line
• Overflow drains and subsoil drains

It’s important to note that the pool’s filtration pipework, which connects the pump, filter, skimmer box, and return jets, operates under pressure and is separate from the drainage systems. This discussion focuses on the drainage lines, which are particularly vulnerable to tree root intrusion.

How Do Tree Roots Cause Blockages in Pool Drains?

Tree roots are naturally attracted to moisture sources, and even a tiny leak at a pipe joint can draw them in. Roots from trees located several metres away can extend towards a cracked joint in older terracotta, earthenware, or PVC pipes. Once a small root finds its way inside, it flourishes in the damp environment of the pipe, trapping waste and debris, which eventually leads to a blockage.

When a drain close to the pool becomes blocked, the backwash water cannot escape, potentially causing flooding on the pool deck. If the blockage occurs within the sewer line, it can result in showers, toilets, and floor wastes inside the home backing up.

If you are landscaping around a new pool, we recommend consulting our guide on suitable tree species to plant in order to minimise the risk of blocked drains. This guide includes information on trees that are safer to plant near pipework.

What Warning Signs Indicate a Blocked Pool Drain or Stormwater Line?

Be vigilant for the following indicators around your pool and inside your home:

• Pool water drains slowly or backs up during backwashing
• The backwash line overflows
• Water bubbles up through a garden drain or grate
• A sink or shower makes gurgling sounds while the pool is being backwashed
• Water collects on the pavers or lawn next to the pool

Each of these symptoms suggests a potentially blocked or damaged pipe underground, and a camera inspection will help us accurately pinpoint the issue.

Why Should You Avoid Excavation Around a Pool?

Gaining access to drainage around a pool can be a challenging process that often leads to damage. Reaching a pipe typically requires lifting travertine or granite pavers, cutting through concrete slabs or retaining walls, or removing garden beds, turf, or decking. Once the pipe is repaired, restoring the paving and landscaping can be extensive and costly.

This is why we prefer relining methods over excavation. In the case highlighted below, relining allowed us to work around steep stairs and an established garden without causing disruption.

Case Study: Successful Pipe Relining Solutions Near a Pool in Sutherland Shire

A homeowner in the Sutherland Shire contacted us regarding three major issues in their backyard:

• A blocked stormwater line next to their in-ground pool
• Gurgling noises emanating from the back garden
• Water pooling in a tiled corner

Our CCTV drain inspection revealed significant root intrusion from a nearby tree, cracks in an old earthenware line, and multiple blocked junctions located approximately 3 metres beneath the pavers.

The accompanying images highlight the situation: the first shows the blocked pipe before intervention, while the second depicts the same pipe after the relining process.

Instead of recommending excavation, we took the following steps:

1. We cleared the line using high-pressure hydro jetting and root-cutting tools.
2. We installed a resin liner throughout the damaged section to seal the cracked junctions and joints.

The stormwater line was restored to its optimal flow, with no disruption to the pavers or garden beds. The entire procedure was completed in under six hours.

What Is the Process for Pipe Relining Without Excavation?

We employ a method known as cured-in-place pipe relining. A resin-soaked liner is inserted into the damaged section of the pipe, pressed against the interior surface, and allowed to cure, effectively creating a new pipe within the old one. This process seals any cracks, leaking joints, and entry points exploited by tree roots. We access the pipe through an existing entry point, such as an inspection opening, ensuring that the surrounding pavers and garden remain undisturbed.

Our dedicated team manages every stage of the relining process, from the initial camera inspection through to the final stages, without involving subcontractors. For more information on the procedure, please visit our pipe relining Sydney page.

When Is Pipe Relining Not the Right Solution for Pool Drain Repairs?

Pipe relining works well for pipes that are damaged but retain most of their shape. If a section has collapsed to the point where a liner cannot be inserted, that part will require excavation and replacement. Likewise, if a section has sunk and lost its gradient, the liner will follow the dip, leading to stagnant water, which requires the reinstallation of the pipe at the correct slope.

Sometimes, our camera inspections reveal that roots have invaded the Sydney Water main rather than your private pipes. In such cases, the responsibility for repairs rests with Sydney Water, and we provide the footage necessary to assist in the reporting process.

Frequently Asked Questions About Blocked Pool Drains

Can the Drain Pipes Surrounding a Pool Be Relined?

Absolutely. We can reline the sewer and stormwater pipes located beneath pool surrounds, provided the pipe retains its shape. A camera inspection is performed first to assess the damage and confirm that a liner can be installed. If any sections have collapsed or sunk, those areas will need to be excavated and replaced.

What Techniques Are Used to Resolve a Blocked Pool Drain Without Excavation?

We clear the blockage using high-pressure hydro jetting and root-cutting tools. After this, we inspect the pipe using a CCTV camera. If the camera identifies cracked joints or root entry points, we can install a resin liner from within the pipe through an existing access point. This repair effectively seals the damage without needing to lift pavers, cut slabs, or disturb the garden.

What Are the Main Causes of Blocked Drains Around Pools in Sydney?

Tree roots are a major cause we encounter around pools, particularly in older terracotta and earthenware pipes. Roots penetrate joints that leak water and continue to grow until they trap debris. A camera inspection will help identify the specific cause of the blockage in your drain.

Who Is Accountable for Removing Tree Roots from a Sewer Pipe in Sydney?

The property owner is responsible for their own pipes. According to Sydney Water’s guidelines regarding repair responsibilities, the owner must also clear tree roots that invade the junction at the connection point. If our camera footage shows that the roots are within the Sydney Water main, the responsibility for repairs lies with Sydney Water, and we will provide the necessary footage to report it.

How Long Does Pipe Relining Take Near a Pool?

The relining project in Sutherland Shire mentioned in this article was completed in under six hours, including root clearing and lining of the damaged section. The duration for your drain will depend on the length of the damaged area, the number of joints requiring sealing, and the accessibility of the entry point. We will provide you with a timeline following the camera inspection.

Schedule a CCTV Inspection for Your Blocked Drain Near the Pool

We strive to find a method for repairing the drain from within the pipe before resorting to excavation, and we will share the camera footage with you prior to commencing any work.

If you notice signs of a blocked drain near your pool, schedule a CCTV inspection or contact The Blocked Drain Guys at 0418 408 333. Craig or one of our team members will explain the inspection process and what we will be looking for.