Fernox Antifreeze Protector Alphi-11 is a combined antifreeze and corrosion inhibitor designed to protect domestic central heating systems against freezing, internal corrosion and limescale formation.
Alphi-11 contains mono-propylene glycol and provides frost protection while helping to maintain the long-term efficiency and lifespan of the heating system. It is suitable for use with all common heating system metals and materials, including aluminium.
A minimum in-use concentration of 25% is recommended to provide adequate corrosion protection. At this concentration, Alphi-11 provides frost protection down to -11°C. Increasing the concentration to 40% provides protection down to -22°C.
Alphi-11 is suitable for heating and chilled-water systems and is compatible with other Fernox products. For new or untreated systems, Fernox recommends thoroughly cleaning and flushing the system with Fernox Cleaner F3 before adding Alphi-11.
Fernox Biocide F7 200ml is a high-performance biocide designed to prevent bacterial contamination and fungal growth in underfloor heating, low-temperature heating and chilled systems.
It also helps clean and prevent the recurrence of microbiological fouling, including jelly-like deposits caused by fungal growth in feed and expansion cisterns. Biocide F7 starts working within 24 hours and provides both short-term disinfectant action and longer-term preservation.
One 200ml bottle treats up to 150 litres of system volume or up to 280m² of underfloor heating. Fernox recommends using Biocide F7 alongside a Fernox Protector, such as Protector F1, to provide protection against corrosion and scale.
The Fernox TF1 Omega Filter 22mm Slip Socket is a high-performance in-line central heating system filter designed to protect domestic heating systems from circulating corrosion debris, sludge, scale and installation contaminants.
Its precision-engineered design combines powerful neodymium magnetic filtration with Fernox Hydronic Particle Separation (HPS) technology to capture both magnetic and non-magnetic contaminants from system water.
The compact design makes the TF1 Omega particularly suitable for installations where space is restricted. It can be installed on horizontal or vertical 22mm pipework, in either flow direction, and can be positioned at up to 45° from vertical where required.
The nickel-plated forged brass construction provides a robust and durable filter body, while the sealed design allows the filter to be cleaned quickly without dismantling the unit.
The TF1 Omega is ideally installed on the return pipe to the boiler and can also provide a convenient dosing point for Fernox Express water treatment products.
The filter is backed by a 25-year warranty from Fernox.
The Fernox TF1 Omega Filter is a high-performance, compact in-line magnetic filter designed to protect domestic central heating systems from circulating corrosion, scale and installation debris.
The TF1 Omega combines powerful magnetic filtration with Hydronic Particle Separation (HPS) technology to capture both magnetic and non-magnetic contaminants from system water. Its compact design makes it particularly suitable for installations where space is restricted.
This 22mm version is supplied with valves, making installation and servicing straightforward. The filter can be fitted to horizontal or vertical pipework, in either flow direction, and can be positioned up to 45° from vertical where access or headroom is limited.
The filter is designed to be installed on the return pipe to the boiler. It can be cleaned in situ without dismantling the unit, helping to make routine maintenance quick and convenient.
The Fernox TF1 Omega Installer Pack 22mm With Valves is a complete solution for cleaning, protecting and guarding domestic central heating systems.
The pack combines the Fernox TF1 Omega 22mm Filter with valves, Fernox Cleaner F3 500ml and Fernox Protector F1 500ml, giving installers the key products needed to clean an existing system and provide long-term protection against corrosion and limescale.
The TF1 Omega is a precision-engineered, sealed in-line system filter made from nickel-plated forged brass. It combines a powerful neodymium magnet with Hydronic Particle Separation technology to capture both magnetic and non-magnetic contaminants from central heating system water.
The filter is designed to minimise pressure loss while maintaining high collection efficiency. It can be cleaned without dismantling the filter, with collected debris discharged through the drain valve. Fernox recommends installing it on the return pipe to the boiler.
The pack is backed by a 25-year warranty on the TF1 Omega filter.
The Fernox TF1 Sigma UB Filter is a compact 22mm magnetic heating system filter designed for installation underneath boilers and in restricted spaces where a conventional in-line filter may not be suitable.
The under-boiler design features a durable glass-reinforced engineering polymer filter body and a forged brass manifold, providing a robust solution for protecting heating systems from circulating corrosion debris, including magnetite.
A powerful neodymium magnet captures ferrous contaminants from the system water, while the engineered flow path is designed to provide high collection efficiency without blocking or restricting flow. The integrated three-way valve allows the filter to be isolated and cleaned through the drain point without dismantling the filter.
Designed to be installed horizontally on the return to the boiler, the TF1 Sigma UB is particularly useful where space is limited or pipework is concealed. Separate flexible or corrugated pipes and/or adapters may be required for some installations and are not supplied.
The Honeywell Home T4360A1009 Frost Stat is a mains‑voltage frost thermostat designed to safeguard boilers, pipework and the building fabric against frost damage. With a fixed 3–20 °C set‑point range, dual‑diaphragm sensing and a tamper‑resistant cover, it’s perfect for cold spaces like lofts, garages or floor voids.
The Worcester Greenstar 22 mm System Filter 7733600236 is a powerful magnetic and non‑magnetic filter that removes rust, metal filings, solder fragments and other debris from your central heating water — helping prevent boiler and pump issues. It is easy to install under, over or remotely from the boiler and includes isolation valves, a detachable body for easy servicing and a drainage point for maintenance. With up to 300 g of magnetic debris captured, this filter helps prolong boiler life and maintain heating efficiency.
The Worcester Greenstar Mini System Filter 22mm (7733600266) provides compact, high-performance protection for your heating system by capturing magnetite and debris before they enter the boiler. Designed for maximum efficiency and easy installation, it helps improve system reliability, prolong boiler lifespan, and reduce maintenance costs—ideal for modern Worcester Bosch heating setups.