• DRAINZAP drain unblocker tub — front view, clears blockages and odours
  • DRAINZAP tub — back label with instructions and ingredients
  • DRAINZAP tub — top view showing powder doses
  • Pouring DRAINZAP into a blocked kitchen sink drain
  • DRAINZAP foaming action clearing a shower drain
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DRAINZAP — Unblocks & deodorises drains

DRAINZAP — Unblocks & deodorises drains

HK$195.00 HKD
HK$195.00 HKD
$32.50 per treated drain
Sale Sold out
✓ SEPTIC SAFE

Clears slow, smelly drains. Helps keep them flowing. Powered by nature’s science.

✅ Trusted by professional cleaners
⭐ Helps keep drains flowing and fresh
🌿 Safe for pipes, plumbing, and septic systems

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 — helping keep drains flowing and reducing 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%)
View full details

See DRAINZAP In Action

Before DRAINZAP

After DRAINZAP

See DRAINZAP In Action

Before DRAINZAP

After DRAINZAP

The Bio-Science Breakthrough

 Thrive isn’t greenwashing. It’s hardcore science. Our probiotic and Clean Chemistry formulas break down odours, stains and build-up at the source — doing what bleach and harsh chemicals can’t.

Learn More About the Science

Targets the root cause, not just the surface.

Helps stop problems coming back.

Gentle on your pipes, bleach-free and biodegradable.

Customer Testimonial

“Our shower drain used to clog every few weeks. I poured in DrainZap, left it overnight, and it’s been clear for months. No fumes, no gloves — just works.”

— Daniel S., QLD

Frequently asked questions

Quick answers to the questions we hear most.

  • Will it clear a fully blocked drain?

    For slow drains and organic build-up — hair, grease, soap scum and food waste — yes. For solid objects, tree roots or damaged pipes, no liquid treatment will help, so call a plumber. For a drain that has been building up, give DRAINZAP an hour, or leave it overnight for heavy build-up.

  • 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 breaks down that build-up, so the smell is far less likely to return the next day the way it does after bleach.

DRAINZAP drain unblocker tub — front view, clears blockages and odours

DRAINZAP — Unblocks & deodorises drains

$195.00