
Harvey's 2 x 4kg block salt packs
Installing a salt block
Harvey Salt Block Compatibility
Harvey's salt blocks 6 packs
Harvey's block salt 10 packs
Harvey's Block Salt 20 Packs
Harvey's Block Salt 30 Packs
Harvey's Block Salt 40 Packs
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Harvey Block Salt - Always low prices
- Details
Each pack contains two 4kg Harvey's Salt Blocks
Our price includes free local delivery.
Why Choose Harvey Block Salt Over Cheaper Alternatives?
Harvey’s Block Salt stands out from cheaper brands for its superior quality and performance. Our engineers have found that using cheap, impure block salt can cause damage to water softeners. These lower-quality salts often contain grit and oil, which settle at the bottom of the machine and can harm sensitive components. Unfortunately, using such salts voids the 10-year warranty we offer on our water softeners. If you find salt blocks significantly cheaper than ours, they are likely of lower quality and could risk damaging your machine.
Compatibility
Harvey Block Salt is compatible with a range of water softeners, including Harvey, Kinetico, Twintec, Crown, BWT, and Monarch models. However, if you own a Minimax Innova, TwinTec Cobalt, or Harvey Arc, you must use Harvey Curve salt blocks.
Are Salt Blocks Better for Water Softeners?
For machines designed to use block salt, this is the most appropriate option. Salt tablets can create undissolved sludge at the bottom of the tank, increasing the need for maintenance. In contrast, block salt dissolves evenly, as it remains just below the water line and leaves no residue. It also stops dissolving once the brine tank reaches a saturation point, ensuring efficient usage.
The Harvey Block Salt Advantage
Harvey is a leading name in the UK water softener industry, having invented block salt for the UK market. Known for its high quality and purity, Harvey Block Salt ensures perfectly softened water. It complies with British Standard BS EN973 and is made from Grade A PDV (Pure Dried Vacuum) food-grade salt, with a purity level of 99.6% - 99.9%.
Harvey Block Salt is compatible with all older-generation block salt softeners, as well as tablet salt softeners that can also use blocks. It is particularly suited for Kinetico water softeners, including the 2020c, AquaBlu, and Compact models.
How Much Salt Will My Softener Use?
Salt consumption varies depending on your water usage and the hardness of your local water. We expect about ¾ of a salt block to be used per person per month, based on Kent and South East London water hardness.
Free Health Check
When we deliver your Harvey Block Salt, we offer a free health check for your water softener, regardless of the brand. If we identify any issues, Hydroworks can arrange a service visit from one of our engineers at no extra charge.
IMPORTANT DELIVERY INFORMATION
Please allow up to 10 working days from the date of your order for delivery. If you are running low and need your salt delivery sooner, please let us know, and we will do our best to help you.- Please Note
- Delivery
Our prices include free delivery to your home or business where we will put your salt neatly away in your preferred location. We will refill your water softener for you, and check the performance of the softener to ensure it is producing beautifully softened water.
Free delivery within our local delivery area of Kent and Sussex.
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Kit 1: Water Hardness Yes/No Tablets
Hard water / soft water test kits
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🧂 Why Salt Quality Really Matters
We only supply pure Grade A PDV salt — because anything less can devastate your softener.
Some salts now entering the UK market (like sea salt, lake salt, and solar-evaporated varieties) aren’t actually cheaper — but they’re packed with things your softener really can’t handle.
⚠️ Here’s what can happen with the wrong salt:
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Seafoam builds up inside your softener. This is often caused by algae or seaweed spores that thrive in salty environments — and once they’re in, they’re almost impossible to flush out - your softener begins to breed algae because this type of algea thrives in salt water environments.
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You’ll also get oil residue from boats and ships — this coats everything internally and causes seals to slip, meaning parts stop fitting properly.
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And then there’s the coarse and fine sand sediment, which can scratch the valve and damage precision components.
In short? It’s not worth the risk.
✅ Using Pure PDV Grade A salt protects your machine.
❌ Using poor-quality salt will invalidate your manufacturer’s guarantee — and could cost you far more than you save.
Want to see the science?
[Click here to explore the full article in our Learning Hub ➜]
💡 Switching from Granular Salt?
If you’ve been using granular salt, now’s the time to switch.
Tablet salt is far better for your machine — it reduces wear and tear and helps extend its life.
The only people who sell and recommend granular salt either don't know how damaging it can be, or don't care - probably because it increases servicing costs and reduces equipment life which means more profit for them sooner.
🧰 FREE Water Softener Health Check
When we deliver your salt, we’ll happily check over your water softener, completely free-of-charge.
Just let us know when placing your order.
🚚 Delivery Information
Please allow up to 10 working days for delivery.
This helps us keep deliveries tight, which helps us to keep our costs down and your salt prices lower too.
However, if you are running low on salt, drop us a message or mention it when placing your online order — we’ll always do our very best to get your salt to you sooner, if we can.