Best of
Best boiling water tap for hard water
Every tap on this page filters the water before it reaches the spout, but the cartridges are not the same. Some are plain carbon, which mainly improves taste. Others use phosphate, calcium or ion-exchange media, which is what filter manufacturers sell specifically against scale in hard water areas. The ranking below puts those first, then orders by price. It comes straight from our model library and moves when a spec or a price changes there, so check the date at the top of the page rather than assuming it is fixed.
- #1
Franke
Franke Mythos Water Hub 6-in-1
Pro M Connect: active carbon + ion-exchange resin sits between the mains and the spout, so the water has already passed through it by the time it reaches your kettle or coffee machine. Replacement cartridges are the running cost to check before you buy.
£2,599 RRPFull spec → - #2
Hanstrom
Hanstrom Saxan 4-in-1
carbon and phosphate sits between the mains and the spout, so the water has already passed through it by the time it reaches your kettle or coffee machine. Replacement cartridges are the running cost to check before you buy.
£399 RRPFull spec →- Amazon UKCheck price at retailerView ↗
- #3
Fohen
Fohen Focetti Pro 4-in-1
carbon and calcium sits between the mains and the spout, so the water has already passed through it by the time it reaches your kettle or coffee machine. Replacement cartridges are the running cost to check before you buy.
£489 RRPFull spec → - #4
Fohen
Fohen Modena Digital 100
carbon and phosphate sits between the mains and the spout, so the water has already passed through it by the time it reaches your kettle or coffee machine. Replacement cartridges are the running cost to check before you buy.
£529 RRPFull spec → - #5
Grohe
Grohe Red Duo L-Size
BWT active carbon sits between the mains and the spout, so the water has already passed through it by the time it reaches your kettle or coffee machine. Replacement cartridges are the running cost to check before you buy.
£1,625 RRPFull spec →- Amazon UKCheck price at retailerView ↗
Specs and prices come from our model library and manufacturer datasheets; this ranking moves when they change there. If you buy through one of the offer links above we may earn a commission. It never changes the order. How affiliate links work here