Stormwater is not sewer — get the system right

Sewer carries wastewater from toilets, sinks and showers. Stormwater carries rain from roofs and hard surfaces. Mixing them, or treating every overflow as a “blocked drain,” leads to the wrong repair. If indoor fixtures are backing up, start with blocked drains. If the problem appears during or after rain — pooling yards, overflowing downpipes, flooded carports — you are in stormwater territory.

We diagnose which system is involved before quoting jetting, pits or pipe replacement.

Symptoms we fix

• Water pooling beside footings, under decks or across lawns
• Gutters overflowing even when leaf screens look clear
• Downpipes that spit water at the base instead of taking it away
• Grated drains that sit full for hours after rain
• Flooding of garages, lower rooms or side gates after storms
• Erosion along discharge paths and damp rising at base walls
• Collapsed or sunken garden lines that used to work

Foothills properties around Magill and Rostrevor often combine steep falls, clay soils and older underrated pipework — a small blockage becomes a waterfall against the house.

Downpipes, pits and grated drains

Effective stormwater is a chain: roof catchment → gutters → downpipes → in-ground pipes → pits/grates → legal discharge point. A failure anywhere in the chain shows up as flooding somewhere else.

• Downpipe connections — sealed, adequately sized, and actually tied into the stormwater (not dumping beside the slab)
• Pits — silt collection points that need accessible lids and occasional cleaning
• Grated drains — across driveways and paving to intercept sheet flow before it enters garages
• Charged lines and pumps — only where design truly requires them; we will not invent complexity you do not need

We install and repair these components as part of a coherent layout, not as random plastic boxes that overflow into each other.

Clearing blocked stormwater vs replacing collapsed lines

Leaves, silt, gravel and sports balls love stormwater pipes. Many lines respond to clearing and pit cleaning. Others are cracked, root-invaded or collapsed under vehicle loads.

1. Inspect pits and visible outlets
2. Clear accessible blockages
3. Camera or probe where the line still misbehaves
4. Repair, replace, or in some drain cases consider pipe relining when the host pipe and system type suit trenchless repair

We quote the durable option. Repeated clears on a crushed pipe under a driveway waste money.

Design and install for builds and extensions

New roofs and paved areas increase runoff. Extensions that ignore stormwater create indoor damp and neighbour disputes. As part of construction plumbing programs, we size and route stormwater to match the new catchment and site discharge rules.

Owner-builders and renovators: involve us before concrete paths seal over the only practical pipe route. Moving a downpipe on a drawing costs little; jackhammering a finished driveway costs a lot.

Adelaide conditions: clay, slopes and summer storms

Eastern foothills get intense bursts of rain on hard, dry ground that does not absorb quickly. Clay holds water against footings. Western suburbs such as Torrensville can combine flat grades with dense paving — water has nowhere to go unless graded drains and pits are designed on purpose.

We look at falls, not just pipe diameter. A large pipe with no grade still silt-traps. A well-graded smaller system that is maintained often outperforms a neglected “big pipe” dump.

Overflowing gutters — plumbing angle

Not every gutter overflow is a roofing issue. Undersized or blocked downpipe take-offs, leaf-filled droppers, and stormwater lines that cannot accept the flow all push water over the gutter lip. We coordinate with what we can see from the plumbing side and will tell you when a roofing carpenter should assess gutter fall or fascia damage separately.

Maintenance that prevents the next flood

• Clear pit silt before winter and after leaf fall
• Keep grate openings free of mulch and gravel
• Check downpipe bases after storms for blow-outs
• Do not bury inspection lids under new landscaping
• Include outdoor drainage in broader plumbing maintenance visits on problem sites

What to prepare for a site visit

• Photos or video during rain (immensely helpful)
• Where water first appears and where it ends up
• Age of paving/driveway and any recent landscaping
• Known pit locations
• Whether indoor plumbing also backs up (suggests sewer, not only stormwater)

Legal discharge and neighbour courtesy

Stormwater must discharge to an approved point — street, easement, or designed soakage where permitted — not onto the neighbour’s barbecue pad. We plan outlets so you solve your flooding without creating theirs. If a previous DIY hose simply dumps at the fence, we will flag it and quote a proper connection.

Charged systems, pumps and when you actually need them

Some sites sit below street level or need water lifted to a higher discharge. Pumps and charged lines add moving parts and maintenance. We only recommend them when gravity options are exhausted. A well-graded gravity system with clean pits beats a neglected pump that fails in the first summer thunderstorm.

Landscaping and paving — plan before you pour

New concrete paths and raised garden beds are common reasons stormwater “suddenly” fails. Lids get buried, falls reverse, and mulch washes into grates. Before landscaping:

• Mark every pit and keep lids accessible
• Maintain fall away from the building
• Choose grate styles that match expected leaf load
• Tell your landscaper where the stormwater runs — do not assume they know

After a major storm — what to check

1. Walk the downpipe bases for blow-outs or disconnected joints
2. Lift pit lids (safely) and note silt depth
3. Photograph any new erosion paths
4. Confirm water is not ponding against weep holes or slab edges overnight
5. Call us if the same corner floods twice in a season — patterns matter

Stormwater drainage across our service area

From Athelstone we handle stormwater issues throughout the footprint. Confirm your suburb on areas we serve or call with the address and a description of the flooding pattern.

Combining stormwater with other site works

If you are already replacing a driveway, building an extension, or regrading a garden, that is the cheapest moment to fix stormwater properly. Tell us about upcoming concrete dates so pits and pipes land before the pour. Retrofitting under finished paving is always possible — just more expensive.

Based at Russell Rd, Athelstone, we coordinate stormwater attendances across East, North-East and West Adelaide within Monday–Friday 7:30am–5:00pm. Flash-flooding after a storm? Photograph first, then call 0401 916 325 so we arrive with a clear picture of the flow path.

Simple homeowner checks before booking

• Are gutters full of leaves at the downpipe droppers?
• Is a flexible downpipe hose disconnected at ground level?
• Has mulch built up over a grate?
• Did flooding start only after new paving went in?

Sometimes the fix is simple. When it is not, you still arrive at the booking better informed.

How to book

1. Call or email with symptoms and, if possible, rain photos.
2. We inspect falls, pits and lines, then quote clearing, repair or redesign.
3. Work proceeds within business hours with site left tidy and water directed away from the building.

Book stormwater drainage with Streamline

Move rainwater away from your home properly — pits, pipes, downpipes and repairs by a local licensed plumber.

Call 0401 916 325 for a free quote on stormwater drainage repair or install.

We also serve these areas

• Stormwater drainage in Paradise
• Stormwater drainage in Norwood
• Magill
• Rostrevor
• All areas we serve