Precise Flow Control: Accurately measures and regulates water flow, ensuring your heating system operates efficiently and effectively. Compatible Fit: Designed specifically for Glowworm and Saunier Duval boilers requiring part number 0020197555. Durable Construction: Made from high-quality materials to withstand the demands of constant use and high temperatures. Easy Installation: Simple to install, allowing for quick replacement and minimal downtime. 12-Month Warranty: Backed by a 12-month warranty, ensuring peace of mind and long-term reliability., Manufacturer: HTS