Prices updated daily — 3 June 2026
Product type overview
drain unblocker sits within Cleaning Products, part of Household, Pets & Other. On this page you compare 27 products from 6 UK supermarkets: Tesco, Sainsbury's, ASDA, Aldi, Morrisons and Waitrose. The lowest unit price for drain unblocker is £2.00/l at Morrisons. In total, 4 variants of drain unblocker are compared (different pack sizes and compositions). All prices are normalised to the same unit (per kilogram, per litre or per piece) so that packs of different sizes can be compared fairly — a larger pack is not automatically the best value. The ranking below shows, per variant, which supermarket currently has the sharpest price, including own-label products alongside national brands. Prices refresh daily from the retailers' own public price lists, so you never see stale offers when planning your weekly shop. Allsupers uses no affiliate links or paid placement; the ranking is purely price-based and updated from public data.
Cheapest drain unblocker
Compare 27 products across 6 supermarkets
drain unblocker — compare prices across 6 supermarkets
Keep It Handy
Keep It Handy Drain Cleaning Liquid
500 ml
£2.00/litre
at 1 supermarket
POWER FORCE
Sink & Drain Unblocker
500 ml
£2.78/litre
at 1 supermarket
Mr Muscle
Mr Muscle Sink & Drain Unblocker Gel 2x1L
2 litre
£3.99/litre
at 2 supermarkets
Mr Muscle
Mr Muscle Sink & Drain Unblocker Gel 1L
1 litre
£4.00/litre
at 4 supermarkets
Mr Muscle
Mr Muscle Power Gel Drain Unblocker Twin Pack
2 litre
£4.00/litre
at 1 supermarket
Mrmuscle
Mr Muscle Drain Gel
2 litre
£4.20/litre
at 1 supermarket
Mr Muscle
Mr Muscle Drain Max Unblocker
1 litre
£4.50/litre
at 1 supermarket
Sainsbury's
Sainsbury's Sink & Plughole Unblocker 500ml
500 ml
£4.50/litre
at 1 supermarket
Morrisons
Morrisons Sink & Drain Gel Unblocker 500ml
500 ml
£4.60/litre
at 1 supermarket
ASDA
ASDA Drain Unblocker Gel 500ml
500 ml
£4.86/litre
at 1 supermarket
Waitrose Ltd
Essential Drain Unblocker
500 ml
£4.90/litre
at 1 supermarket
TESCO
Tesco Sink & Drain Unblocker 500Ml
500 ml
£5.00/litre
at 1 supermarket
Mr Muscle
Mr Muscle Max Drain Unblocker Gel 500ml
500 ml
£5.50/litre
at 4 supermarkets
HG
Hg Hagesan Liquid Drain Unblock 1L
1 litre
£5.50/litre
at 1 supermarket
Mr Muscle
Mr Muscle Drain Gel
500 ml
£5.50/litre
at 2 supermarkets
Mr Muscle
Mr Muscle Eco Drain Unclogger
750 ml
£6.67/litre
at 1 supermarket
Mr Muscle
Mr Muscle Biodegradable Drain Unclogger Cleaner Bottle 750ml
750 ml
£6.67/litre
at 1 supermarket
Mrmuscle
Mr Muscle Drain Foamer
500 ml
£7.00/litre
at 1 supermarket
Mr Muscle
Mr Muscle Foamer Sink & Drain Unblocker 500ml
500 ml
£8.04/litre
at 3 supermarkets
MR MUSCLE
Mr Muscle Drain Hair Dissolver Gel 500ml
500 ml
£8.50/litre
at 1 supermarket
Mr Muscle
Mr Muscle Drain Foamer Odour Eliminator
500 ml
£9.00/litre
at 1 supermarket
Buster
Buster Bathroom Plughole Unblocker
600 ml
£10.00/litre
at 1 supermarket
Buster
Buster Bathroom Plughole Unblocker
300 ml
£10.00/litre
at 4 supermarkets
Buster
Buster Plughole Sanitiser Gel 300ml
300 ml
£13.17/litre
at 1 supermarket
HG
Hg Drain Hair Unblocker 450 Ml
450 ml
£15.11/litre
at 1 supermarket
Buster
Buster Unblocker Kitchen Concentrated Power 150g
150 g
£26.67/kg
at 2 supermarkets
Delphis Eco
Delphis Eco Drain Cleaner Tablets
40 g
£250.00/kg
at 1 supermarket