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Technical Details
- Opens clogged drains fast
- Dissolves grease, rags, paper towels, soap in minutes
- When poured into a clogged drain One shot works instantly before emergency treatment is required
Product Specifications
Power Sourcenot_applicable
Batteries Included?No
Batteries Required?No
Product Description
Manufacturer's Description
A chemical approach to the blocked drain. One Shot uses a corrosive to dissolves blockages in the drain. Recommended for regular monthly usage as a preventative treatment.
Product Description
Dissolves grease, rags, paper towels, soap in minutes
When poured into a clogged drain One shot works instantly before emergency treatment is required
Product details
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Customer Reviews
Most Helpful Customer Reviews
26 of 26 people found the following review helpful
My bathroom sink was terribly slow to drain and gradually getting worse until the water was standing there for DAYS. Tried three chemical unblockers (Mr Muscle, Domestos and Buster) none of which removed or even improved the blockage, plunging with a regular and then an extra large concertina style plunger didnt shift it, neither did a drain snake (though I had to use this without removing the u-bend as it was inaccesible) so finally I started calling round for quotes from plumbers, one of whom (stupidly or kindly) told me he would use OneShot. I googled it and found it was available from plumbers merchants and went out and bought it for 4.99+ VAT on top.
The instructions say pour it SLOWLY, so using both hands I poured about 125ml down the plughole - you have to be careful to try get the stream of acid to pour directly into the drain and not touch your metal work as it will discolour it. I waited the 5 minutes then added 125ml of water and after waiting another 5, flushed it with water. The blockage wasn't gone, but was better. So I tried it again, this time making sure that I dry plunged on the plughole first - without any water in the sink to try to force what water was down there to move so I could get the acid closer to the blockage. I poured in a bit more this time, left it for 10 minutes and then added water.
As soon as I added the water a gurgling sound happened all the way down the pipes and then the water was running down the sink perfectly! I left the tap on for 10 minutes to make sure all the acid was flushed away and out of my pipes. Couldn't be happier - this is the only product I will ever use for blocked drains again and I still have half a bottle left! So happy not to have had to pay a plumber to do exactly the same as I did!
The instructions say pour it SLOWLY, so using both hands I poured about 125ml down the plughole - you have to be careful to try get the stream of acid to pour directly into the drain and not touch your metal work as it will discolour it. I waited the 5 minutes then added 125ml of water and after waiting another 5, flushed it with water. The blockage wasn't gone, but was better. So I tried it again, this time making sure that I dry plunged on the plughole first - without any water in the sink to try to force what water was down there to move so I could get the acid closer to the blockage. I poured in a bit more this time, left it for 10 minutes and then added water.
As soon as I added the water a gurgling sound happened all the way down the pipes and then the water was running down the sink perfectly! I left the tap on for 10 minutes to make sure all the acid was flushed away and out of my pipes. Couldn't be happier - this is the only product I will ever use for blocked drains again and I still have half a bottle left! So happy not to have had to pay a plumber to do exactly the same as I did!
9 of 9 people found the following review helpful
This is far better than any other product I know for this purpose. Purchasers should be aware though that the liquid is very dangerous and must be used with gloves & goggles. It can dissolve skin & can spit when added to water. Also if a drain is badly blocked it may need several applications to clear the problem.
7 of 7 people found the following review helpful
My plumber recommended this product as he uses it himself. When my bath, washbasin and kitchen sink were recently banking up and not draining away as they should, I tried this one morning. I needed to repeat the process a few times but, eventually, everything cleared. Now I can wash, bath or shower and do the washing up and feel squeaky clean.
Do be very careful though. Wear rubber gloves and treat the product with great respect as it contains sulphuric acid which can seriously burn.
However, for the cost of £10, it does save on the cost of a plumber's call out charge, materials and labour!
Do be very careful though. Wear rubber gloves and treat the product with great respect as it contains sulphuric acid which can seriously burn.
However, for the cost of £10, it does save on the cost of a plumber's call out charge, materials and labour!
Most Recent Customer Reviews
Its great but please please please be careful
Recently use this product to unblock a really nasty blocked sink. It worked!!! But in the process did not pay enough attention to health and safety. Read more
Published 3 days ago by Tony Plumber
Awesome but deadly
This is a fantastic product and really cuts through grime. Had smelly plug holes which resisted bleach and everything else: NOT this however. Read more
Published 19 days ago by Get2Grips
brilliant stuff
My plumber put me onto this product about 10yrs ago and since that time I have used loads of other (easier to get) products but this is the only product I have ever found that... Read more
Published 1 month ago by Mrs. J. Martin
Drain Cleaner.
This sounds a bit frightening to use but if you follow the instructions should be perfectley safe.
The results are second to none as I unblocked a slow running shower drain... Read more
The results are second to none as I unblocked a slow running shower drain... Read more
Published 1 month ago by Graham
One Shot Liquid Drain Cleaner 1 Litre
This product is a very good product for unblocking your drainage .The chemical is able to burn through rag or rope ,which tells me this is a strong chemical to use . Read more
Published 1 month ago by Kevin
be ware
Tried this product on a blocked toilet and when I poured some liquid into the bottom of the toilet, (there was a little residual water still in there) it started reacting and... Read more
Published 1 month ago by S-Mac
Use with caution
It was difficult to give this a star rating.
I was advised to use this for a shower drain. Read more
I was advised to use this for a shower drain. Read more
Published 1 month ago by Mark
NONE BETTER - but use with respect!
I've used this for years. My local shop who used to sell it has now closed down, so I'm delighted to see it here on Amazon - & at such a good price! Read more
Published 2 months ago by An Avid Reader
best product
Ive put about 6liters of domestos and dr magic and they wont work so forget about them, after I used one shot it took only about 20min and I have a superb results now like never... Read more
Published 3 months ago by tomasi69
Does what it say on the bottle
Used this on an almost blocked drain from my bathroom basin which had accumulated gunk over a period of 5 years and the hole had reduced from 1 1/4" to 1/4" and the sink was taking... Read more
Published 3 months ago by Mindblower
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