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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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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Maxisss
Carnegie, US
★★★★★ 5
Good quality shelves
Color: Walnut, Size: 24in, Color: Walnut, Size: 24in
These shelves are gorgeous in person. Yes, they're darker than the listing pics, but I actually prefer it. The grain is beautiful, they came well-packed, and mounting them was no trouble at all. Now I've got display space that feels both stylish and practical. Definitely worth it!
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Reviewed in the United States on February 9, 2026
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Laoneil1004@gmail
Louisville, US
★★★★★ 5
AWESOME
Color: Rustic Brwon, Size: 16in
EASY INSTALL, I WILL BUY MANY MORE
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Reviewed in the United States on May 7, 2026
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Louis G
Whiting, US
★★★★★ 5
Easy to install, very tough!
Color: White, Size: 16in, Color: White, Size: 16in
Seriously, scoring these shelf stands for $30 feels like an absolute steal! Four chunky wood boards with metal T-brackets that actually feel substantial - way sturdier than those flimsy IKEA ones I used to have. My old cheapo stands warped after half a year, but these hold up like a champ - I've got like 15 heavy textbooks stacked on them right now. Love the little details too: rounded edges so you won't scrape your hands, and rubber grip strips on the bottom. They look legit fancy in my living room as bookshelves and even class up my kitchen herb garden. My friend thought they were some high-end designer furniture! Honestly, the craftsmanship at this price puts my old $60 wooden shelves to shame. Already told my DIY group chat about these - trust me, you can't go wrong!
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Reviewed in the United States on March 13, 2025
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Chad Collins
Alexandria, US
★★★★★ 4
Great look. Sturdy.
Color: Rustic Brwon, Size: 16in
Great look if you can get it installed. The sticker paper mounting guides rip so easy so he careful!
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Reviewed in the United States on October 4, 2025
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Lisa Bulkilvish
Waukegan, US
★★★★★ 1
Worst item ever
Color: White, Size: 16in
Set up shelves and not sturdy at all. Followed the instructions perfectly. Very poorly made. I don’t have the box and now I’m stuck with the item. Garbage can here it comes.
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Reviewed in the United States on April 20, 2026

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