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Product Details

Heavy duty formulation reacts with the water and blockage enabling it to melt away grease, fat and food build ups. Safe for plastic pipes.

Technical Specification
Brand Zep
Unavailable offshore
Manufacture ID 0001ZCLQHEATOOL6
Safety Data Sheet click here
Type Unblocker
Volume (L) 1
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 9pm Mon-Fri (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Zep Commercial Liquid Heat Drain Unblocker 1L is rated 4.6 out of 5 by 20.
Rated 5 out of 5 by from Worked like a dream Desperate to clear a bath sink and it worked.
Date published: 2020-02-16
Rated 5 out of 5 by from Worked Used last night, half the bottle and left over night. This morning flushed through with boiling water, blockage cleared. Don’t waste money on supermarket drainer cleaner they are a waste of money. This product does what it’s supposed to do.
Date published: 2020-02-15
Rated 5 out of 5 by from Liquid Armageddon Brilliant. Just brilliant. Having faffed about for the last year with supermarket brands - both traps were perfectly clear - which didn't even touch the problem of blocked bath and basin (they share the same main outlet), I turned to the internet and bingo, a day later my salvation arrived in the shape of two bottles of liquid armageddon. I suspected it was hair that was the real issue but I was taking no chances, the drainpipes were gonna get it, so I gave them both barrels and used a half-bottle of "Liquid Heat" first, then two hours later flushed with almost-boiling water, then repeat. It was then half a bottle of the "10 minute Hair Clog Drain Unblocker", flush with almost-boiling water after 10 minutes and repeat, before finally running the hot taps on both bath and basin for a minute or so. I managed to access the outlet pipes just the other side, downstream of the traps so there was no dilution effect of the trap-retained water which logically should help enormously. Result was the fastest draining outlets in the west, haven't performed as awell since the house was built. Superb.
Date published: 2020-02-06
Rated 3 out of 5 by from probably unhelpful didn't work for me, but no mere chemical would have, once i exposed the problem. May have helped though. Who can say...
Date published: 2020-01-30
Rated 5 out of 5 by from Does exactly what it says. An excellent product, far better than the proprietary supermarket brands. Works prefectly.
Date published: 2020-01-17
Rated 5 out of 5 by from 'It Works' Used 'Zep Commercial Liquid Heat Drain Unblocker' to clear a 100mm underground drain. Poured 3/4 of bottle down sink and left for 18 hours on Christmas Eve and the following morning (before opening the presents) flushed it through with hot water initially then lots of cold water. The results were quite amazing as large amount of debris could be seen in the manhole flowing towards the main sewer. Will now borrow some rods to ensure that the drain is completely clear.
Date published: 2020-01-02
Rated 3 out of 5 by from Hard scaling Didn't work for the problem I had
Date published: 2020-01-02
Rated 4 out of 5 by from Fail Failed yo unblock my toilet
Date published: 2019-12-30
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