Tablet salt

Need tablet salt for your water softener? Our salt tablets are 99.9% pure PDV salt manufactured to BS EN 973 standard — compatible with every UK tablet-fed water softener including Hydrosoft, Aquasol and non-branded systems.

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Aquasol Tablet Water Softener Salt 40 bags x 25kg (1000kg pallet)
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1000 kg 500 kg 250 kg 25 kg
Expected: 05-08-2026
£399.00 £332.50 Regular Price £419.00 £349.17
Bulk from  £379.00 £315.83
Aquasol Tablet Water Softener Salt 20 bags x 25kg (500kg half pallet)
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1000 kg 500 kg 250 kg 25 kg
Expected: 05-08-2026
£239.00 £199.17 Regular Price £249.00 £207.50
Aquasol Tablet Water Softener Salt 10 bags x 25kg
Family Products:
1000 kg 500 kg 250 kg 25 kg
Expected: 05-08-2026
£169.00 £140.83
Aquasol Tablet Water Softener Salt 50 Bags x 10kg (500kg half pallet)
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1000 kg 500 kg 250 kg 10 kg
Expected: 05-08-2026
£449.00 £374.17 Regular Price £469.00 £390.83
Aquasol Tablet Water Softener Salt 50 Bags x 10kg (500kg half pallet)
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1000 kg 500 kg 250 kg 10 kg
Expected: 05-08-2026
£269.00 £224.17 Regular Price £279.00 £232.50
Aquasol tablets Water Softner Salt 25 x 10kg bags
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1000 kg 500 kg 250 kg 10 kg
Expected: 05-08-2026
£179.00 £149.17
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Aquasol tablets Water Softner Salt 25kg bags
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1000 kg 500 kg 250 kg 25 kg
Expected: 05-08-2026
£23.80 £19.83 As low as £8.51
Bulk from  £8.51 £7.09
Aquasol tablets Water Softner Salt 10kg bags
Family Products:
1000 kg 500 kg 250 kg 10 kg
Expected: 05-08-2026
£19.80 £16.50 As low as £3.83
Bulk from  £3.83 £3.19
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Need help with your choice? Call 01902214281 between 8 a.m. and 4 p.m.

Tablet salt for every UK water softener that takes loose salt

f your water softener uses compressed salt tablets rather than blocks or loose crystals, this is the page you need. Every product here is high-purity tablet salt — small round compressed pellets that dissolve evenly in your softener's brine tank to produce the soft water your home relies on.

Every batch is 99.9% pure PDV salt (Pure Dried Vacuum salt — the highest food-grade purity available), manufactured to BS EN 973:2009 — the British and European standard for salt used in water treatment. No fillers, no anti-caking agents, no impurities that build up sludge in your softener tank. Available in 10kg bags (easy to carry up stairs to flat or upstairs softener) and 25kg bags (best value for ground-floor or garage installations).

Which water softeners take tablet salt?

Tablet salt is the most common UK water softener salt format outside of the block-fed Kinetico/Harvey's ecosystem. If your softener has a large open brine tank (rather than a fixed-size block cabinet), it almost certainly takes tablet salt or granular salt. The following UK softener brands use tablet salt:

  • Hydrosoft — both domestic and commercial models
  • Aquasol — branded softeners
  • Monarch — tablet-fed models
  • BWT — tablet-fed softeners
  • Most non-branded single-cylinder softeners
  • Older British Salt, Care Cubes, Broste Expo, Regenit, Pioneer and Supreme systems
  • Commercial and industrial softeners (typically run on bulk tablet or granular)

Most modern UK water softeners — except for the block-fed Kinetico, Harvey's, TwinTec, Minimax and BWT block models — use tablet salt. If you can't tell which type yours takes, open the salt cabinet:

  • Round compressed tablets (about the size of a 50p coin, ~25mm across) → tablet salt
  • Rectangular solid blocks → block salt
  • Loose crystals or granules → granular salt

If your cabinet is empty or very low, check your softener's manual for the recommended salt type.

What tablet salt actually is — and why purity matters

Salt tablets are compressed high-purity sodium chloride. The manufacturing process matters more than most people realise:

  • Each tablet is approximately 25mm in diameter and weighs around 10.5g
  • Made from Pure Dried Vacuum (PDV) salt — fine-grained salt that's been evaporated under vacuum for maximum purity
  • Compressed under high pressure into uniform round tablets that won't crumble or stick together
  • 99.5–99.9% sodium chloride content — the higher the purity, the less residue builds up in your softener tank

Why purity matters: water softener tanks are sealed environments where the salt dissolves slowly into a brine. Low-purity salt contains insoluble minerals (calcium, magnesium, sulphates) that don't dissolve — they sink to the bottom of your tank and form a sludge that gradually clogs the system. Over years, this can lead to softener failure that costs hundreds of pounds to fix.

High-purity PDV salt dissolves cleanly with virtually no residue, keeping your softener tank clean and your system performing reliably for 15+ years.

25kg or 10kg bags — which size do you need?

The two standard tablet salt pack sizes serve different practical needs:

25kg tablet salt — the best value

The industry-standard size and the cheapest per kilogram. A 25kg tablet salt bag is about 35cm × 55cm × 14cm and contains enough tablets for 4–8 weeks of typical household use. Best for:

  • Ground-floor softener installations
  • Garage or utility room installations where you can wheel the bag in
  • People comfortable lifting a 25kg bag (it's heavy)
  • Households planning ahead with multiple bags
  • Anyone buying on a pallet for bulk savings

10kg tablet salt — easier to handle

Smaller, lighter, easier to carry. A 10kg tablet salt bag typically has a carry handle and contains about 40% of a 25kg bag — usually enough for 2–3 weeks of household use. Best for:

  • Upstairs softener installations (carrying salt up flights of stairs)
  • Flats with no lift or narrow staircases
  • Elderly users or anyone who finds 25kg too heavy
  • Smaller households who don't need a 25kg supply at once
  • Trial orders before committing to bulk

Why you should buy tablet salt at Salt Giant?

We deliver tablet salt across the UK, with tablet salt near me delivery covering every mainland UK postcode. Most local plumbing suppliers carry small expensive packs; ordering online with us typically saves 20–40% on equivalent quantities — especially on bulk and pallet orders.

Order before 14:00 on a working day and your tablet salt leaves us the same day. Small 10kg and 25kg bag orders ship by courier (usually next working day for most UK postcodes). Half pallet and full pallet orders are delivered kerbside by pallet network couriers within 1–3 working days. Free UK delivery on orders over £ 25.

For commercial customers with forklift facilities, we can ship 49 bags per pallet (versus 40 bags for kerbside delivery) — get in touch for trade pricing on regular pallet orders.

FAQ

What's the difference between tablet salt and block salt?

Tablet salt is loose compressed salt pellets (about the size of a 50p coin) used in water softeners with brine tanks — Hydrosoft, Aquasol, Monarch, BWT and most non-branded UK systems. Block salt is solid rectangular blocks used in block-fed softeners — Kinetico, Harvey's, TwinTec, Minimax. They're not interchangeable: tablet salt won't fit a block cabinet, and blocks won't dissolve properly in a brine tank. Check your softener's manual or look at what's currently in the salt cabinet.

How often do I need to refill tablet salt?

For a typical UK family of 4 in a hard water area: every 4–6 weeks with a 25kg bag. Smaller households can stretch a 25kg bag to 6–8 weeks; very hard water areas may need refills every 3–4 weeks. Don't wait for the tank to run empty — top up when the salt level drops to about a third. This gives the resin time to regenerate fully between refills.

Can I use tablet salt in my dishwasher?

Yes — most dishwashers with a built-in water softener compartment can use the same tablet salt as your water softener. Check your dishwasher manual: some manufacturers recommend specific "dishwasher salt" which is essentially the same product in slightly different packaging. Salt tablets UK-sourced and at 99.9% purity meet the requirements for both water softeners and dishwashers.

What does BS EN 973:2009 mean for tablet salt?

BS EN 973:2009 is the British and European standard for salt used in water treatment applications. It specifies minimum sodium chloride content (typically 99.5%+), maximum impurity limits (calcium, magnesium, sulphates), and manufacturing requirements. All our tablet salt is BS EN 973:2009 compliant — it's the assurance you need that the salt won't contain impurities that damage your softener over time.

How much tablet salt do I need per year?

For a typical UK family of 4 in a hard water area: 150–200kg per year (6–8 bags of 25kg, or 12–18 bags of 10kg). Smaller households use 75–125kg per year; large families with very hard water can use 250–350kg. A half pallet (500kg) covers most households for 2–3 years; a full pallet (1,000kg) covers 4–6 years.

Is your tablet salt food-grade pure?

Yes — all our tablet salt is 99.9% PDV salt, the same food-grade purity used in food production and pharmaceutical applications. High purity matters for water softener health: low-purity salt leaves insoluble residue (sludge) in the salt tank over time, which clogs the system. Food-grade PDV salt dissolves cleanly and leaves no residue.

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