Fernox Alphi-11 Antifreeze Protector 5L (liquid) 61033
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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Product Reviews
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 5
Perfect gift for an electrician
Tough,great size and perfect my husband loves it stays cold for hours worth the money hard to dent or mess up. Great for an electrician
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Reviewed in the United States on December 25, 2025
J
Verified Purchase
Joel Viamonte
Battle Creek, US
★★★★★ 5
I loved
Super good, it really keeps the cold well
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Reviewed in the United States on April 14, 2026
M
Verified Purchase
mitzuh jasso
Lake Worth, US
★★★★★ 5
Perfect Buy for you Hardworking Man/Women
I’ve bought my husband 3 of these already for work we love them easy to clean super durable perfect for his job. Keeps his coffee nice and hot and his chilled drinks nice and cool! We love it every chance we get we buy another one.
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Reviewed in the United States on January 11, 2026
I
Verified Purchase
Ilda Espana
Lowell, US
★★★★★ 4
Doesn’t maintain hot too long.
I love this cup because the material is good for heavy duty jobs like mine. I took off one star because it does keep hot but not for super long, it lasts hot for about 2-3 hours. Other than that it’s easy to wash and the magnet that comes on the cup is super strong which comes in handy for not loosing it. It magnetized on to the cup.
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Reviewed in the United States on October 28, 2025
A
Verified Purchase
Antonio Crissinger
Birmingham, US
★★★★★ 5
It's the best.
I'm picky on my coffee cups. Klien though has made a great cup for ones like me who work construction. This tumbler not only keeps your coffee hot, but is tough as hell. I can't count how many times it's fallen, dropped, or accidently kicked and still works like new. The rubber bottom and sides grip great. The magnet is strong and helps with tipping over, or possibly dropping. The locking lid also helps with spills.
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Reviewed in the United States on August 4, 2024

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