Sodium Hypochlorite 14/15% - Liquid Chlorine

High strength 14/15% available chlorine, an unstabilised liquid chlorine for chlorinating and shock dosing swimming pools. It lifts free chlorine quickly across large volumes, carries no cyanuric acid, and pours straight in with no dissolving step. Buy for near-term use, as strength eases off in storage.

• Delivers 14/15% available chlorine, so a modest volume treats a large pool.
• Raises free chlorine fast, letting you dose the pool to its working band quickly.
• Works as routine daily chlorination or as a heavier shock after heavy pool use.
• Adds no cyanuric acid, so it suits indoor pools and water already high on stabiliser.
• Pours as a ready-made liquid, ideal for dosing pumps and large pool volumes.

Sizes and prices

Available in 5L, 10L, 20L, 25L.

• 5L: £12.75
• 10L: £25.50
• 20L: £51.00
• 25L: £63.75

How to use

1. Test free chlorine, pH and total alkalinity, and confirm pool pH sits at 7.2 to 7.6 first.
2. Work out a starting dose for the pool volume and add no more than half of it to begin with.
3. Run the circulation pump so the whole pool turns over while you dose.
4. Pour the liquid slowly into the water in front of a return jet, or feed it through your dosing pump.
5. Circulate for at least 30 minutes, then retest and top up only if free chlorine is still under the band.
6. Hold the pool at its target free chlorine band and let levels settle before swimmers return.

Frequently asked questions

What strength is this liquid chlorine?

It is 14/15% available chlorine, a high strength sodium hypochlorite, so a modest volume treats a large pool.

What free chlorine level should a pool hold?

Dose to hold your pool in its free chlorine band. Always test and dose to the band rather than to a fixed amount.

Do I need to dilute it before adding?

No. Pour it slowly into circulating water in front of a return, or feed it through a dosing pump, then retest before you top up.

How soon can swimmers return?

Let free chlorine settle back into the working band after dosing, then retest before anyone swims.

Which size should I choose?

5L and 10L suit domestic pools, 20L suits larger or busier pools, and the 25L is a bulk drum for commercial and public pools.

Is the 25L a pallet item?

Yes. The 25L drum ships on a pallet with a 16-drum minimum order, so it is set up for bulk and trade buyers.

How long will it keep?

Buy for near-term use. Strength eases off over weeks and faster in heat and light, so rotate stock and store it cool, dark and upright.

Is it stabilised?

No. This is unstabilised liquid chlorine and adds no cyanuric acid, which is why it suits indoor pools and high-stabiliser water.

Can I dose it through a metering pump?

Yes. Liquid chlorine is well suited to automatic pool dosing pumps, which is a common setup on larger pools.

Does it affect pool pH?

Yes, it lifts pH as it works, so keep pH minus to hand and rebalance the pool to 7.2 to 7.6 after dosing.

Will it raise calcium hardness?

No. Unlike calcium hypochlorite it adds no calcium, so pool hardness is unaffected.

Why is my pool chlorine slow to rise?

Either the stored liquid has weakened or demand is high. Retest, dose with fresh stock to the band, and shock if combined chlorine is up.

Liquid chlorine or calcium hypochlorite for a pool?

Both are unstabilised. Liquid chlorine pours in, suits dosing pumps and adds no calcium; calcium hypochlorite is a granule that also raises hardness.

Liquid chlorine or SDIC granules?

SDIC is stabilised and adds cyanuric acid; liquid chlorine adds none, which is why pool operators use it where stabiliser is already high or indoors.