Collis Bros Plumbing

Groundwater, Drainage, & Flood Prevention

Unchecked groundwater issues can be disruptive and damage your property. We’ll make rising damp and mould history!

Do you Have Groundwater, Drainage, Or Flooding Issues? We can Help You!

Having a constantly wet driveway, property or even under-house (groundwater, floodwater, and stagnating water) can lead to serious structural issues, and health problems (mould anyone?).

  • Groundwater Solutions
    Do you have water pooling around your home?
  • Stormwater Solutions
    Pipelines, aglines, downpipes and more.
  • Sewage Solutions
    Hydro pressure jetting and camera inspections.

Does your yard look like this when it rains

  • Groundwater-drainage
  • Gutters overflowing
  • Burst pipe
  • Flooding
  • Drainage overflowing
  • Water pooling
  • Water unable to drain away when it rains
  • Water under your house

Common groundwater & Flooding problems in our area

We find that a lot of overwhelmed customers contact us “by chance” after getting lost in the maze of all the tradesmen and professions they could ask the advice of. The feedback is that they feel like no one had been able to provide them with guaranteed work and/or a well-priced solution.

We proudly can say that in virtually all cases, we have fixed their problems. This has often been at a fraction of the cost they had been quoted by other trades.

Ben, our Plumber and project manager has developed over his 20+ years’ experience an intuitive eye. He is able to tailor a solution to the design/specifics of your property. He manages to establish what system or combination would be most efficient, least intrusive, and most affordable for any groundwater or flood affected area.

Ben also explains the issues and solutions in a simple way, to make sure that the customer can participate in the process of picking the right option for their situation.

Whether your best design option of stormwater system includes pipelines, pits, agg-lines, downpipes, sub-soil drainage, wet wall (or all of the above), you can be assured that we will brain-storm a system and it will be a fair price (nothing over the top!) and that our experienced plumbers will install it all professionally.

Groundwater or flooding can lead to:

  • Instability of in-ground sewer system (leading to repeated blockages)
  • Instability of building’s structure (moving/ cracked walls)
  • Damaged furniture
  • Damp walls
  • Mould (Breathing issues, development of bacteria’s etc.)


Call (02) 9907 9807 to arrange a call out with one of our plumbers for a preliminary inspection of your drainage.

We have a vast knowledge of old and new sites, with an excellent eye for details.

Our experience provides us with the ability to problem solve problems and provide an onsite diagnostic evaluation, ensuring fast results and job completion.

Get in touch with us to discuss your groundwater and plumbing requirements.

Need A Reliable Plumber In A Hurry?
We Service These Locations & More

All across Sydney’s Northern Beaches & North Shore
And Beyond. Call Us Now And We’ll Look After You!

  • Mosman
  • Artarmon
  • Dee Why
  • North Sydney
  • Manly
  • Mona Vale
  • Chatswood
  • Frenchs Forest
  • Palm Beach
  • Whale Beach
  • Avalon Beach
  • Bilgola Beach
  • Newport
  • Bayview
  • Church Point
  • Ingleside
  • Warriewood
  • Elanora Heights
  • Narrabeen
  • Cromer
  • Brookvale
  • Seaforth
  • Balgowlah
  • Fairlight
  • North Manly
  • Narraweena
  • Allambie Heights
  • Curl Curl
  • Wheeler Heights

Plumbing, Drainage, Wet Fire Systems, Roof Plumbing, & Much More

If you would like an obligation-free quote, then please contact us now. Phone, text, or via the contact page. We’re on-hand to assist.