Clean interior — DRAINZAP in Surry Hills, NSW

Smelly Drains in Surry Hills, NSW — DRAINZAP

Near-coastal humidity and older, low-ventilation housing make Surry Hills drains slow to dry out and quick to smell.

Science-led. Powered by nature.

The problem in Surry Hills, NSW

Surry Hills sits only a few kilometres from the coast, and that near-coastal humidity keeps bathrooms damp long after every shower. The suburb's older terraces — many prone to poor ventilation — give hair, soap and organic build-up in the drains exactly the conditions they need to linger and smell.

The DRAINZAP approach

DRAINZAP takes a different approach to caustic supermarket gels. It uses advanced clean chemistry (peracetic acid generated in-situ) — the effervescent foam expands to fill the pipe, breaking down hair, slime and organic waste on contact, then rinses away. No caustic soda, no sulfuric acid, and it is safer on the older plumbing that comes with older housing stock. Science-led. Powered by nature.

DRAINZAP — Unblocks & deodorises drains

Clears drains. Prevents blockages. Powered by nature’s science.

$34.95 incl. GST

Shop DRAINZAP

Free shipping on orders over $99 to Surry Hills — dispatched from Auburn, NSW.

Real results

BEFORE

AFTER

About DRAINZAP

DRAINZAP clears slow or smelly drains with a powerful, innovative formula that dissolves hair, soap scum, and grime within the hour — or leave it overnight for the best result on heavy build-up — without burning pipes, and gentler on your plumbing and the environment than caustic products. No caustic chemicals. No harsh odours. Just a deep, natural clean that keeps water flowing freely and odours away.

How to clear a blocked shower or sink drain

Pour a dose into the drain, add warm water and let the effervescent foam expand through the pipework — dissolving hair, soap scum and organic build-up within the hour (leave overnight for heavy build-up). Use monthly to keep drains flowing and odour-free.

Septic-safe drain cleaner — no caustic chemicals

DRAINZAP clears the same organic blockages caustic products target — without the hazard. Safe for pipes, plumbing, fittings and septic systems.

Why We Made This

Most drain cleaners rely on caustic chemicals that burn through blockages but damage your pipes and the planet. We built DRAINZAP to clear drains the smarter way. Powered by nature’s science, its unique, biodegradable formulation breaks down organic build-up fast — preventing blockages and eliminating odours at the source.

Instructions

INSTRUCTIONS:

1. Run warm water in drain for 10 seconds
2. Pour one scoop directly into the drain.
3. Leave for 45–60 minutes — it works within the hour — or overnight where possible for heavy build-up.
4. Use as required to keep drains clear and fresh.

For full step-by-step instructions, see our How It Works page.

Ingredients

Sodium carbonate peroxyhydrate (25-50%)
Citric acid (10-20%)
Disodium lauryl sulfosuccinate (1-5%)

DRAINZAP FAQs

Will it clear a fully blocked drain?

For most organic blockages (hair, grease, soap scum, food waste) — yes. For solid foreign objects (a toy, a cotton bud stuck sideways) — no, nothing liquid will. For a drain that's been slowly building up and finally stopped: give DRAINZAP one hour, leave overnight if possible for maximum effect. Save the plumber callout.

Is it safe for my pipes?

Yes. DRAINZAP is a clean chemical formulation, not caustic. When activated with water it generates thick foam, coating pipework internals and dissolves greasy residues, hair, organic waste and destabilises biofilms. It won't corrode PVC, copper, brass, or stainless steel. Unlike chemical drain openers, you can use it as often as you need without damaging seals or pipe walls.

Is it septic safe?

Yes — fully septic safe. It clears the same organic blockages caustic products target — without the hazard, or the damage to fittings and plumbing. Most chemical drain openers kill the bacteria that make your septic system work. DRAINZAP does not.

How often should I use it?

For maintenance (preventing blockages or bad odours): once a month. For a slow drain: one dose and repeat when the problem arises again. For a bad blockage: one dose, leave overnight.

Will it get rid of the smell?

Yes. Drain smells are primarily caused by organic buildup (fats, oils, grease, hair, food particles) and "biofilm" — a slimy layer of bacteria that grows on the pipe walls, which emits gases as it breaks down waste. DRAINZAP digests that buildup, so the smell doesn't come back the next day like it does with bleach.

Surry Hills questions, answered

Why do drains in older Surry Hills terraces smell more than in new builds?

Two of the suburb's defining conditions work together: older terraces are prone to poor ventilation, and near-coastal humidity keeps damp air sitting in bathrooms. Organic build-up in the drain never fully dries, so the odour keeps rising. Treating the build-up inside the pipe is what breaks the cycle.

Is DRAINZAP safe for the plumbing in older homes?

Yes — DRAINZAP works without caustic soda or sulfuric acid, the ingredients most likely to stress ageing pipes and fittings. Its foaming clean chemistry breaks down hair and organic build-up while being gentler on plumbing than conventional caustic products.

How often should I treat drains in a humid, low-ventilation bathroom?

A monthly preventative dose keeps build-up from re-establishing where damp air slows drying. If a drain has been slow or smelly for a while, start with a full treatment, then move to maintenance dosing.