The Fernox F7 Biocide 200ml is a corrosion-resistant solution designed to protect low temperature heating systems, specifically boiler and storage tank water heaters. Made in the United Kingdom, this unit is ideal for safeguarding your heating system against corrosion and damage, ensuring optimal performance and longevity. With its 200ml quantity, this product is a convenient and effective way to maintain the health of your heating system, making it a valuable addition to any home heating setup.
Used for my underfloor heating and boiler/cylinder circuits. Seems to work well as no sign of jelly-like deposits and both circuits drain clean. As with most chemicals these days though, it's becoming more expensive, especially as annual replacement is recommended.