Tree Roots Blocking Pipes: Effective Solutions for Pools

Your pool area might look magnificent, but you could be facing persistent drain backups nearby. In the Sutherland Shire and southern Sydney, our investigations using advanced camera technology in blocked sewer or stormwater lines near pools frequently reveal invasive tree roots that have penetrated the joints of older piping systems.

Resolving a blocked pool drain doesn’t always require the lifting of pavers or digging up your garden. This article explores the causes of blockages, the techniques we employ to identify them, and how pipe relining offers a successful solution by addressing the problem from within the pipe itself.

What Types of Drainage Systems Are Located Beneath Your Backyard Pool?

In many Sydney residential pools, the surrounding area is typically covered with paving, tiles, decking, retaining walls, and garden beds. Beneath this hardscape, you will generally find several drainage lines:

• The household sewer line
• Stormwater drainage systems from the roof, paving, and pool area
• 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 naturally gravitate towards sources of moisture, and even a slight leak at a pipe joint can attract them. Roots from trees located several metres away can extend towards a cracked joint in older terracotta, earthenware, or PVC pipes. Once a small root infiltrates the pipe, it flourishes in the moist environment, capturing waste and debris, and eventually causing a blockage.

When a drain near the pool becomes obstructed, the backwash water has nowhere to escape, potentially resulting in flooding on the pool deck. If the blockage occurs in the sewer line, it can cause showers, toilets, and floor wastes inside the house to back up.

If you are landscaping around a new pool, consider consulting our guide on suitable tree species to plant to avoid blocked drains. This guide offers insights into trees that are safer to plant near pipework.

What Signs Indicate a Blocked Pool Drain or Stormwater Line?

Be vigilant for the following signs around your pool and within 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 when the pool is being backwashed
• Water pools on the pavers or lawn next to the pool

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

Why Is Excavation Around a Pool Best Avoided?

Accessing the drainage around a pool can be a complex task that often results in damage. Gaining access to a pipe typically involves lifting travertine or granite pavers, cutting through concrete slabs or retaining walls, or removing garden beds, turf, or decking. After repairing the pipe, restoring the paving and landscaping can be extensive and expensive.

This is why we prefer relining methods over excavation. The case highlighted below demonstrates how relining allowed us to navigate around steep stairs and established gardens 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 significant issues in their backyard:

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

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

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

Instead of suggesting excavation, we undertook 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 optimal flow, with no disruption to the pavers or garden beds. The entire process was completed in under six hours.

What Is the Process for Pipe Relining Without Excavation?

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

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

When Is Pipe Relining Not Suitable for Pool Drain Repairs?

Pipe relining is appropriate for pipes that are damaged but still maintain most of their shape. If a section has collapsed to the extent that a liner cannot be inserted, that segment will require excavation and replacement. Similarly, if a section has sunk and lost its gradient, the liner will follow the dip, leading to stagnant water, thus necessitating the reinstallation of the pipe at the correct slope.

Occasionally, our camera inspections may reveal that roots have infiltrated the Sydney Water main rather than your private pipes. In such cases, the responsibility for repairs lies with Sydney Water, and we provide the footage necessary to facilitate 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 conducted first to assess the damage and ensure 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 with 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 Common Causes of Blocked Drains Around Pools in Sydney?

Tree roots are a primary cause we encounter around pools, especially in older terracotta and earthenware pipes. Roots penetrate leaking joints 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 any 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, which included root clearing and lining of the damaged section. The time required 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 determine a method for repairing the drain from within the pipe before contemplating excavation. We will show you the camera footage before starting any work.

If you notice signs of a blocked drain near your pool, arrange 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.