SKU: 94495463602

Fernox Alphi-11 Antifreeze Protector 5L (liquid) 61033

Sale price$42.08 Regular price$46.75
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Description

Fernox Alphi-11 Antifreeze Protector 5L (liquid) 61033Fernox Alphi 11 Antifreeze Protector 5L (liquid) 61033 product description: Available in a 5 litre liquid product, Antifreeze Protector Alphi 11 is compatible with all other Fernox products. Antifreeze Protector Alphi 11 is a combined antifreeze and inhibitor product, which provides protection against internal corrosion and limescale formation in domestic central heating systems. Antifreeze Protector Alphi 11 is suitable for use with all metals and

Fernox Alphi-11 Antifreeze Protector 5L (liquid) 61033 product description:

Available in a 5 litre liquid product, Antifreeze Protector Alphi-11 is compatible with all other Fernox products.

Antifreeze Protector Alphi-11 is a combined antifreeze and inhibitor product, which provides protection against internal corrosion and limescale formation in domestic central heating systems.

Antifreeze Protector Alphi-11 is suitable for use with all metals and materials commonly used in heating systems. For long-term protection ensure concentration levels are maintained and checked annually as part of the boiler or system service.

Application, Fitting & Dosing The minimum recommended ‘in-use’ concentration of the product is 25% in order to ensure adequate corrosion protection.

This concentration will protect down to -11 °C. A concentration of 40% will protect down to -22 °C. Alphi-11 Antifreeze Protector can be introduced via the feed and expansion tank, or injected directly into the system via a suitable point (e.g. dosing pot). Introduce into the system after draining off a quantity of water at least equal to the amount of Alphi-11 to be added.

Engage the circulating pump and have the system online for a few hours in order to achieve an even distribution. Concentration 25% 30% 35% 40% Protection -11 °C -15 °C -18 °C -22 °C.

In single feed indirect cylinders, e.g. “Primatic” or similar, potable water chemicals must be used. We recommend untreated systems are thoroughly cleansed and flushed, in accordance with BS 7593:2019 and Benchmark, using Fernox Cleaner F3, before treating with Fernox Alphi-11 Protector, as existing debris can damage the installation. Package, Handling & Safety Fernox Alphi-11 Antifreeze Protector is supplied in 5 and 25 litre containers.

Fernox Alphi-11 Antifreeze Protector is classified as non-hazardous and non-irritant, but as with all chemicals keep out of reach of children. Do not mix with other chemicals with the exception of Fernox products.

Do not take internally. In case of contact with eyes or skin, rinse immediately with plenty of water.

Physical Specification / Properties Fernox Alphi-11 Antifreeze Protector contains mono-propylene glycol. Colour: Colourless Odour: Aromatic (slight) Form: Clear liquid pH (conc.) 6.9 pH (25% solution): 6.4 – 7.4 SG: 1.04 at 20°C

Product features:
  • Protects against corrosion and limescale build-up in central heating systems to maintain energy efficiency
  • Combined antifreeze and corrosion inhibitor to extend system life
  • Prevents pipework freezing
  • Compatible with all metals and materials commonly used in heating systems; including aluminium
  • Non-toxic, environmentally friendly formulation NSF CIAS, KIWA and Belgaqua approved
  • Suitable for heating and chilled water systems
Product manual

Fernox Alphi-11 Antifreeze Protector 5L (liquid) 61033 product specifications

Product video

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 94495463602

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Juli J. Denning
Lake Worth, US
★★★★★ 5
Soft, comfortable and really nice.
Size: Full
This product is of really nice material. It's soft and comfortable, deep pockets and fits my bed perfectly. It's a great product, however, if you're looking for something for back support, this isn't it. It isn't for me anyway - there's no firmness to this topper at all but it is very comfortable.
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Reviewed in the United States on April 5, 2026
M
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Mrs. V
Dallas, US
★★★★★ 5
COMFORTABLE AND WORTH THE MONEY
Size: Queen
Excellent mattress topper. Its thick and paired with my matress provides a high end hotel feel. I have had it for a few months and it has not lost its shape and stays in place. Worth the money. You are definitely getting what you paid for.
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Reviewed in the United States on May 26, 2026
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Pam
Charlottesville, US
★★★★★ 5
Awesome!!
Size: King
This mattress topper is like sleeping on a cloud. It is so soft and comfortable to sleep on. It stays on the mattress very nice. Great price for a very nice topper. Highly recommend
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Reviewed in the United States on March 23, 2026
I
Verified Purchase
ilovepugs
Phoenix, US
★★★★★ 5
Wow!!!
Size: King
I couldn’t be happier with this mattress cover—it completely transformed my sleep. I had one of the best nights of sleep I’ve had in a long time—no tossing and turning, just pure comfort. It stays in place nicely and feels high-quality and well-made. Fluffy without the bulk. If you’re looking to upgrade your sleep without buying a whole new mattress, this is absolutely worth it. Highly recommend!
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Reviewed in the United States on April 10, 2026
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Ana M Vega
Los Angeles, US
★★★★★ 4
Best sleep matress topper
Size: Queen
Ordered after running out of options to get a good night's rest. Placed Q sized mattress topper on a tempur pedic matress and 1st night slept like a baby on a cloud. Ever since then I have knocked out after sleeping and moved less at night. Restful sleep has blessed out house again. It feels like a hotel comfy mattress. Totally recommend.
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Reviewed in the United States on April 8, 2026

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