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Hard water causes serious limescale build-up in pipes, boilers and household appliances, which leads to costly repairs and reduced efficiency over time. At Salt Giant, we supply premium water softener salt designed to keep your ion-exchange system running as it should. Our high-purity softening salt is free from additives, so it leaves no residue in your brine tank and helps extend the lifespan of your water softening system.
Depending on your system, you may need a different type of softener salt to get the best results. We stock all the main varieties used across the UK:
The most common type in the UK. Round, compressed white salt tablets roughly the size of a 50p coin. Most modern non-branded water softeners take tablet salt as standard; it is the default unless your softener manual specifies otherwise. Usually available in 10 kg or 25 kg bags.
Solid rectangular blocks of compressed salt, typically sold in pairs that fit specific block-fed softener cabinets. Block salt is particularly popular in the UK because Kinetico, Harvey's, TwinTec and Minimax softeners all dominate the market here and all run on block salt. If your softener takes blocks rather than loose salt, this is the one you need.
Loose, free-flowing salt crystals — sometimes called salt crystals, PDV salt (pure dried vacuum salt) or just granular salt. Used in older, higher-capacity and some specialised water softeners. Also doubles as dishwasher salt and pool salt if you've got multiple uses. Sold in 15kg or 25kg bags.
Loose, free-flowing salt crystals, sometimes called PDV salt (pure dried vacuum salt) or simply granular salt. Used in older, higher-capacity and some specialised water softeners. It also works as dishwasher salt and pool salt if you have multiple uses for it. Available in 15 kg or 25 kg bags.
If you are still not sure which type to order, your softener brand is usually a good indicator. Kinetico and Harvey's softeners almost always take block salt. Modern Hydrosoft, Aquasol and most non-branded units take tablet salt. Older or commercial-grade softeners often run on granular.
Whether you are a homeowner stocking up for the winter or a facilities manager overseeing a commercial property, we have the right quantities for you. You can order standard bags or take advantage of our bulk and pallet options for the best price per tonne. Ordering a full pallet of softening salt means you always have enough on hand and you will not be caught out when you run low.
Instead of searching for water softener salt near you and hauling heavy bags back from a DIY store or supermarket, let us take care of it. We deliver to every UK mainland postcode, so wherever you are in the country you can have proper softener salt at your door within working days. No trips to a stockist, no relying on whatever your local plumbing supplier has in stock and no paying supermarket prices for the privilege.
Order before 14:00 on a working day and your salt leaves us the same day. Small bag orders ship by courier, usually arriving the next working day for most UK postcodes. Bulk bags and full pallets are delivered kerbside by a pallet network courier within 1 to 3 working days. Free UK delivery on all orders over £ 25.
You'll occasionally see PDV salt mentioned in product descriptions. PDV stands for Pure Dried Vacuum salt — a manufacturing method that produces extremely high-purity salt (99.9% sodium chloride) by evaporating brine under vacuum.
Most quality water softener salt sold in the UK is technically PDV salt, whether it's labelled that way or not. The key thing for your softener is the purity: the higher the purity, the less insoluble residue builds up in the salt tank over time. Cheaper salt with lower purity can leave a sludge in the bottom of your softener that gradually clogs the system.
All our water softener salt is high-purity PDV, regardless of whether it's tablet, block or granular.
The main difference is the shape and how they fit into your system. Tablet salt consists of small, rounded pellets, block salt comes in solid bricks (typically 4kg), and granular salt looks like coarse crystals. You should always use the specific type of salt for water softener units that your manufacturer recommends, as using the wrong shape can cause bridging or salt mushing in the brine tank.
This depends on your household water usage, the hardness of your local UK water supply, and the size of your tank. As a general rule, you should check your brine tank once a month. For optimal performance, the tank should be kept at least half full of water softening salt.
No, you should never use table salt, cooking salt, or standard sea salt in a water softener. These types of salt are much finer and contain additives like iodine or anti-caking agents. They will dissolve too quickly, causing a thick sludge that can clog your system's valves and permanently damage the resin bed.
Yes, absolutely. We cater to both domestic users and large-scale commercial clients. If you are looking to purchase water softener salt bulk orders or full pallets, you can find highly competitive wholesale pricing directly on our website, complete with fast commercial delivery.
This issue is known as "salt bridging." It occurs when a hard crust forms in the brine tank, creating an empty space underneath the salt. When this happens, the water cannot reach the salt to create brine. High humidity or using the wrong type of salt can cause this. You can carefully break the crust with a broom handle and ensure you are using high-quality Salt Giant softening salt to prevent it from happening again.
