A slow drain and a fully blocked drain might seem like the same problem — but they have different causes, different risks, and different solutions. Here’s how to tell them apart and when to call a Melbourne blocked drain plumber.
What’s a Slow Drain?
A slow drain empties — just not quickly. Water goes down, but it pools first. This usually means a partial blockage: soap scum, hair, grease, or debris is partially restricting flow but hasn’t completely sealed the pipe.
Common causes of slow drains
- Hair and soap scum — most common in shower and bathroom sink drains
- Grease and food scraps — kitchen sink drains
- Toothpaste, cotton buds, wipes — bathroom basin drains
- Mineral build-up — especially in older Melbourne homes with hard water
What’s a Blocked Drain?
A blocked drain doesn’t empty at all, or backs up with water. In severe cases, you’ll see water coming up from other drains (e.g. flushing the toilet causes the shower drain to gurgle or overflow). This indicates the blockage is in the main drain line, not just the individual fixture.
Common causes of blocked drains
- Tree root intrusion — extremely common in Melbourne’s older suburbs with established gardens
- Flushed items — wipes, sanitary products, cotton balls
- Collapsed or cracked pipe — older clay pipes can crack or sag over time
- Grease build-up — years of fat poured down the kitchen drain
- Foreign objects — toys, jewellery, excessive toilet paper
Key Differences at a Glance
| Slow Drain | Blocked Drain | |
|---|---|---|
| Water drains? | Yes, slowly | No, or backs up |
| Location | Usually single fixture | Can affect multiple fixtures |
| Risk level | Low–medium | Medium–high |
| DIY fix possible? | Sometimes | Rarely |
| Plumber needed? | If persists | Yes — call now |
Can I Fix a Slow Drain Myself?
Sometimes. For a shower or bathroom basin with hair and soap build-up, a drain snake or hair catcher removal often works. A mixture of baking soda and vinegar can help for minor grease build-up. However, avoid harsh chemical drain cleaners — they can damage PVC pipes and cause corrosion in older metal pipes.
If a slow drain doesn’t clear after a basic DIY attempt, or if it keeps coming back, there’s likely a deeper issue. Call a plumber before it becomes a full blockage.
When to Call a Plumber for a Blocked Drain
- Water is not draining at all
- Multiple drains are blocked simultaneously
- You can hear gurgling in other drains when one is in use
- The blockage keeps returning after DIY clearing
- You have a sewage smell coming from drains
- Water is backing up into other fixtures
A professional plumber uses CCTV drain cameras and high-pressure water jetting to locate and clear blockages properly — including tree roots and collapsed sections that a drain snake can’t touch.
Sedcon Plumbing clears blocked drains across Melbourne 7 days a week. Call 0468 013 012 or visit our blocked drain service page.
Learn more about our Blocked Drain Plumber Melbourne service, or see all suburbs we cover across greater Melbourne.