The MSR Arctic Fuel Pump is specifically designed for use in freezing temperatures. It features robust seals to prevent leaks in arctic conditions.
MSR says:
Specifically engineered for use in temperatures below freezing, our Arctic Fuel Pump features extra-robust seals to prevent leaks in arctic conditions. It is field-maintainable and works with all MSR liquid-fuel stoves, except the Dragonfly® stove.
Use only below 0° C (32°F).
MSR's Arctic Fuel Pump utilises materials in its seals and components that only function effectively in arctic conditions (Consistently sub 0°C temperatures). This is not a fuel pump that is suitable for use at any other time as it will potentially leak fuel.
Thank you Ultralight for shipping it to India. Bought this for an Expedition to Siberia, Russia. At -23° C it worked flawlessly with MSR Stove XGK. It is designed to be used in sub zero. I met another team whose pump had completely gone and almost had to call of their Expedition. If going for extreme conditions expeditions go for MSR Arctic Pump for MSR stoves. Do not take any chances.