Drain unblockers Drain unblocker test results

Drain unblocker test results

We tested chemical drain unblockers and mechanical drain unblockers to see how successfully they could shift kitchen and bathroom blockages, and found that using mechanical methods is not only greener, it's also more effective than pouring chemicals down the drain.

We also tested some alternative products you may already have in the house including bleach, soda crystals and even plain old hot water. On bathroom blockages 500ml of household bleach did as good a job as some of the dedicated drain unblockers, and it’s much cheaper.

If you're a member you can see which are the best drain unblockers.

Get Which? reviews and advice

Which? members have full access to all of our reviews - log in now if you're already a member or try a trial subscription to Which? to get instant access to our site.

Expert impartial reviews

When you sign up, you'll get access to this exclusive review as well as thousands of others.

Why use Which?

We test products in the way you use them, looking at quality and ease of use without being bamboozled by manufacturers' claims.

Independent

Which? is unbiased. We buy every product we test and don't accept any advertising.

Advice you can trust

When you join Which? you get a monthly magazine, you can phone our legal service and money helpline, and you can access Which? Local, where members share recommendations for services in your area.

Ready to become a Which? member? Then take out a trial subscription today.