Speedwellstar 15Kg Greenhouse Vent Opener Piston Replacement Automatic Window Cylinder for Cold Frames and Greenhouses

REPLACEMENT PISTON ONLY – This listing is for the piston cylinder only, not a complete vent opener. Designed to replace worn or faulty pistons in your existing automatic greenhouse vent opener M10 THREAD – CHECK COMPATIBILITY BEFORE ORDERING – Fits Speedwellstar vent openers and many similar automatic greenhouse vent openers using a standard M10 (10mm) thread. Please check your existing piston size and thread before purchasing. Not compatible with Bayliss vent openers. 15KG LIFTING FORCE – AUTOMATIC OPERATION – Strong piston lifts up to 15kg, opening and closing your greenhouse window automatically as temperatures change. TEMPERATURE ACTIVATED FUNCTION – Opens automatically between approx. 15–23°C. In colder temperatures the piston will remain closed – this is normal operation. QUICK & EASY TO REPLACE – Remove your old piston and screw in the new one. Before fitting, place the piston in the freezer for 10 minutes and push the pin inward until you feel firm resistance. No tools required and installation takes just minutes.