There is a reason our trucks spend so much time in Perth’s older suburbs. Homes from the first half of last century through the 1970s are wonderful things, character, gardens, established streets, and underneath them runs drainage from the same era, clay pipes with a joint every metre, decades of accumulated history on the walls, and mature trees that have spent fifty years learning where the water is. Clearing drains in these homes is a different job from clearing a modern PVC line, and doing it well, without damaging what is down there, is genuinely a specialty. Here is what makes older drains different, and how they should be treated.
What is actually under an older Perth home
The typical older drainage system is glazed earthenware, clay, laid in short sections and joined with mortar or rubber rings that were state of the art when installed. The clay itself endures impressively, it does not corrode and can outlast the house, but the system’s character comes from its joints, dozens of them per property, each a small movement point in Perth’s shifting sand and a potential doorway for roots. Add half a century of soap, scale and grease glazing the walls, the occasional previous repair of varying quality, and falls that ground movement has gently rearranged, and you have a system that works, but with far less margin than it had in 1965.
Why the blockages are different
Older homes do not just block more often, they block differently. Roots dominate, entering at joints and returning seasonally after every clearance that does not seal their doorway. Build up is mature, not a film but a hardened lining that has narrowed the bore for decades, which is why an older drain can be technically clear and still slow. Displaced joints and subtle sags hold water and catch solids in the same spots repeatedly, giving the blockages a memory. And the pipe itself may be fragile in places, previous cracks, worn inverts, patched sections, which changes how much force the clearing method can safely apply. A blockage history that keeps repeating in the same line is not bad luck, it is the system describing its weak points.
The wrong ways to clear them
Two approaches cause most of the damage we see in heritage era drains. The first is brute mechanical force, an aggressive eel driven hard into an unknown clay line can punch through weakened pipe, turning a blockage into a collapse, and we have excavated the results. The second is chemistry, caustic cleaners and acids do nothing useful against root masses and mature build up, while attacking old seals and lingering as a hazard. The common thread is working blind, applying force or chemicals to a pipe whose condition nobody has seen, which in an older system is a coin toss with excavation on the losing side.
The right way, look first, then clear accordingly
The professional sequence for older drains starts with the camera. A CCTV inspection shows the material, the joints, the build up, the roots and any fragile sections before anything touches them, and it turns the clearing method into a decision rather than a default. High pressure water jetting then does the actual work, and this is where jetting particularly shines in older systems, because pressure is adjustable, the operator can treat a sound section and a fragile one differently, and the result is a pipe scoured back toward its original bore rather than a hole punched through the middle of fifty years of lining. A second camera pass verifies the result and documents the system’s true condition, which becomes the baseline for every future decision.
From clearing to keeping
Clearing an older drain answers today. Keeping it clear is about the doorways. Where the footage shows root entry points, cracked sections or failed joints, relining rebuilds the line from the inside, one seamless modern pipe cured within the durable old clay, no excavation, and no joints left to exploit, and it is the single intervention that most changes an older home’s drainage future. Where the system is sound but mature, a maintenance rhythm, jetting every couple of years and a camera check alongside, keeps the accumulated decades from quietly rebuilding. Either way, the owner ends up with something older homes rarely have, certainty about what is underneath.
Respect the old pipes
Older Perth homes deserve drain work that matches their construction, informed, adjustable and careful, not brute force applied blind. That has been our specialty for more than 25 years, and it is why so much of our work comes from the suburbs where the pipes have stories. If your older home’s drains are slowing, smelling, gurgling or repeating themselves, call Drains Plus. We will look before we clear, clear without harm, and show you exactly what your home is standing on.
If you are buying or renovating in an older suburb, the same logic applies in advance. A pre purchase or pre renovation camera inspection of the drainage costs little against the transactions it informs, and it regularly changes decisions, a negotiation adjusted, a landscaping plan rerouted away from a fragile line, a reline scheduled before new paving goes down rather than through it. The worst version of an older drain problem is the one discovered after the new garden, and the entire discovery costs a camera pass to avoid.
