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Best drain blaster

Updated: 23 October 2026

You want one tool from this amazon.co.uk set, and the pages that rank best on Google are a different shelf. This best drain blaster note names a top pick and a best value inside the ten saved listings, and it says who should walk away from each. The highest star line is a force pump for a sink, bath, or shower, not a toilet gun. Prices are GBP from those listings, captured on 21 October 2026, not a live scrape. The Products Compared editorial team did not lab-test them. A qualifying purchase can earn a commission at no extra cost to you. The full table is the [drain blaster comparison](/hub/diy-supplies/drain-blaster).

You want one tool from this amazon.co.uk set, and the pages that rank best on Google are a different shelf.

Our top picks

Rothenberger Rothenberger RoPump 71991

Best overall

Rothenberger Rothenberger RoPump 71991
8.6/10about £21.92
View offer
HzNzYHD HzNzYHD air drain pump, four suckers

Alternative

HzNzYHD HzNzYHD air drain pump, four suckers
8.4/10about £14.99
View offer
XREXS XREXS drain buster, two cups

Best value

XREXS XREXS drain buster, two cups
8.0/10about £12.34
View offer
On this page
  1. 1.Best for a sink, bath, or shower trap
  2. 2.Best value if you will stroke a cup
  3. 3.If you specifically want a trigger gun
  4. 4.Names that are not in this set

Best for a sink, bath, or shower trap

The top pick is the Rothenberger RoPump 71991, ASIN B001QFEVBC, at about £21.92. It is a 360 g suction-pressure hand pump. The listing states a maximum of 50 psi, a 440 mm wand, a triple sealing lip, CE, and a two-year manufacturer warranty. Across 5,304 amazon.co.uk reviews the star line is 4.3. UK reviews describe a slow kitchen sink, a soap-gummed bathroom waste, and a shower or bath moved in a couple of strokes. Toilets are not in the outlets. A reviewer put the bell at about 95 mm and missed a recessed kitchen waste until a smaller cup was taped on. A heavy clog can push mess back into the bowl. Skip it for a WC. Super Plus 072070X, with WC adaptor 72071, is not this ASIN. How the mechanisms differ is the drain blaster buying guide.

Best value if you will stroke a cup

The best value is the XREXS, ASIN B075ZPPK7K, at about £12.34. It is a 400 g dual-cup plunger: a 15 cm cup stated for toilets and urinals, and a 6.3 cm cup stated for a kitchen sink or bathtub. The star line is 4.0 from 3,987 reviews. Buyers report toilet clears and a shower tray in two pumps when the overflow was blocked. There is no trigger and no pressure figure. The seal needs hard downward pressure. A shaft seized, one account reports rust within a year, and on a toilet the bowl contents can be drawn upward. Skip it when you came for a trigger. The about £8.99 JJX has only nine United Kingdom reviews in the saved listing, which is why the lower price does not take this place.
Rothenberger Rothenberger RoPump 71991

Testsieger

Rothenberger Rothenberger RoPump 71991
8.6/10about £21.92
View offer

If you specifically want a trigger gun

HzNzYHD, ASIN B08XQ9L28M, is about £14.99 and 4.2 from 536, with the first 50 reviews in the saved listing marked United Kingdom. Buyers describe a kitchen sink, a shower tray, and a toilet, including baby wipes in two blasts. You pull the handle about 10 to 20 times. Item weight is 650 g and a bullet says 750 g. The page claims about 12 times atmospheric pressure, with no test. The gun is short on a full WC. XMPEKO, ASIN B0BVWDY453, is 4.0 from 662 at the same shelf price. UK reviews cleared a toilet on a later attempt and a kitchen sink on a sixth. Pressure leaked at the joints after a few months. Neither takes a badge. inShareplus at about £22.99 has a gauge and prints 8 bar (8 PSI). Eight bar is not 8 psi.

Names that are not in this set

FindThisBest and Expert Reviews lead with other pumps, a flange plunger, a chemical opener, and an auger. None of that shortlist is a row here. Do not import those ranks, and do not blast after a chemical cleaner. Thames Water says a blocked pipe at home can cost more than £200. That warning does not make an about £14.99 gun the right tool for cement, a collapsed pipe, or a mass of wipes. Buy the RoPump for a light sink, bath, or shower when the bell covers the hole. Buy the XREXS when you will stroke a cup. Buy an about £14.99 gun only for a stored-air shot you can stop if the cup will not seal.

Common questions

Which one should I buy from this set?
For a light sink, bath, or shower blockage, the top pick is the RoPump 71991 at about £21.92, 4.3 from 5,304. For a stroked cup on a basin and a WC, the best value is the XREXS at about £12.34, 4.0 from 3,987. For a trigger, look at the HzNzYHD or the XMPEKO, both about £14.99. Skip the RoPump for a toilet, and skip the XREXS if you wanted a gun.
What if I need it for a toilet?
Do not take the RoPump. Toilets are not in its listed outlets, and the long WC adaptor belongs to Super Plus 072070X, which is not this ASIN. The XREXS states a 15 cm cup for toilets, and UK reviews also describe an awkward fit. The about £14.99 guns name a toilet and still depend on a seal.
Is the XREXS the cheap gun?
No. It is a dual-cup plunger you stroke. The cheap trigger gun in this set is the JJX at about £8.99, 3.9 from 135, with nine UK reviews in the saved listing. That sample is why about £8.99 is not the best value. The XREXS has 3,987 reviews and two stated cups.
Are the £14.99 guns better because they claim 12 atmospheres?
The claim is a bullet, not a test, on both the HzNzYHD and the XMPEKO. Clears often take more than one shot, cups miss modern sinks, and guns can leak later. A higher slogan does not outrank the RoPump 50 psi line or the XREXS review count. Keep the first charge modest on plastic.
Is RoPump Super Plus the same product?
No. 71991 is the compact swivel-bell pump in this set, listed for sinks, showers, and baths. Super Plus 072070X is the larger article, sold with the WC adaptor 72071. A red colour in a photo is not the article number.

Related pages

How to use a drain blaster

Toilet drain blaster

Drain blaster

Drain blaster buying guide: gun, pump, or cup size

Drain blaster vs caustic soda: air before the bottle

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 21 October 2026. Updated 22.10.2026.

  1. Wonkee Donkee: how a power plunger works (retrieved 22.10.2026)
  2. Silverline drain blaster manual (retrieved 22.10.2026)
  3. Approved Document H, drainage and waste disposal (retrieved 22.10.2026)
  4. Thames Water: blockages (retrieved 22.10.2026)
  5. GOV.UK: sodium hydroxide (retrieved 22.10.2026)
  6. NHS Wales: safe use of liquid drain cleaners (retrieved 22.10.2026)
  7. Citizens Advice: who repairs drains and sewers (retrieved 22.10.2026)
  8. Consumer Rights Act 2015, section 22 (retrieved 22.10.2026)