can i use this with a septic tank?

I don't have a septic tank but I do have a "Biodisc" digester instead of mains sewerage. I've used Duo four or five times over about the same number of years and it has not caused any problems. It also does the job far better than anything else 've ever tried.

Can use this for the toilet? Would it damage the white ceramic bowl?

Good afternoon, Please be informed that HG "duo unblocker" must not come in contact with the ceramic bowl. It must be pourred carefully in the drain, to avoid any damage of the surface. However in case of a toilet we can not guarantee that the blockage will be solved. The blockage could be too far away or the product will be diluted too much by the water in the toilet drain. Trusting that we have informed you sufficiently, with kind regards, HG consumerservice

is this suitable for outdoor drains?

Good morning, Please be informed that this product is not suitable for outdoor drains. We do not have an alternative product in our product range which can be at your assistance. Trusting that we have informed you sufficiently, with kind regards, HG consumerservice

Can this be used in a washing machine? to help clear hair blockage?

No, this is not suitable for use in a washing machine or dishwasher. We would suggest using HG Service Engineer which is designed for use with washing machines and dishwashers.

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🚿 Clear drains, clear mind — unblock like a pro!

SAFE SPLASH FREE - No foaming or splashing, safe for all pipe types, and ready to use without dilution.
TIME SMART CLEANING - Leave it for just 1 hour or overnight for deep, persistent clog removal.
ECO CONSCIOUS FORMULA - GMO-free and designed with professional-grade cleaning standards for your home and office.
DUAL ACTION POWERHOUSE - Two-component formula (Bottle A & B) targets stubborn blockages with unmatched efficiency.
VERSATILE DRAIN SOLUTION - Perfect for kitchen sinks, bathroom drains, showers, and utility areas—goodbye plumber calls!

HG Duo Unblocker is a professional-grade, dual-component drain cleaner designed to dissolve tough blockages caused by oil, food, soap scum, and hair. Delivered in two 500ml bottles, it offers a splash-free, safe, and easy-to-use solution for kitchen and bathroom drains. Its powerful formula works within an hour or overnight, eliminating the need for costly plumbing services while protecting your pipes.

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Excellent communication throughout the order process. Product is perfect.

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Good experience, but the tracking updates could be better.

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Product Name	HG DUO UNBLOCKER 1 LITRE
Weight	1.4 Kilograms
Volume	1000 Millilitres
Units	1 Count
Storage Instructions	Transport and store the box upright. Always store the bottles in a cool dark place in an upright position.
Manufacturer contact	Unit 2 Lanswood Park Colchester Co7 7Fd
Brand	HG

HGDuo Unblocker, Powerful Drain Cleaner, for Kitchen Sink or Bathroom Pipes - 2 x 500 ml

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