Important tips In normal, the slightly bulging lid will not affect the sealing (refer to the picture on the right). If the sealing fails and the lid is obviously bulging, you can try again with a new canning lid. This is not a problem with the jar sealer kit You are also very welcome to contact the store, we will solve the problem for you. FAQ Q1. Can the Manual Vacuum Pump be connected to the hose? No, please do not connect the hose to the manual vacuum pump, the manual vacuum pump can be used directly on the jar sealer, as shown in the main picture 4 in the link. Because the calibers of the hose and the manual vacuum pump do not match, forcing them to be used together will affect the tightness, and also destroy the silicone ring in the middle of the manual vacuum pump, which greatly shortens the life of the manual vacuum pump. Q2. Why does my manual vacuum pump not work? Please pay attention to the following points when using the manual vacuum pump: (1) The holes of the manual vacuum pump and the jar sealer should be aligned. (2) Hold the manual vacuum pump so that the hole of the manual vacuum pump firmly presses the hole of the jar sealer to form a channel isolating the external air between the manual vacuum pump and the jar sealer, so as to effectively pump air and seal effectively. (3) Under normal circumstances, when you feel that it is difficult to pump, you can stop pumping. If you are unsuccessful at the first time, you can pump several times, which can improve the sealing performance. In short, the above details are related to the success or failure of the seal, if you are still not sure, you can watch the video in the link. Go in from the main picture 7, you can see all 5 videos, the second half of the second video is about the display process of the use of the manual vacuum pump. Q3. Why does the lid also pop up when I pull out the jar sealer? Or the lid is not sticking to the mason jar? (1) Before pumping the mason jar, keep its mouth dry and clean. (2) You can loosen the jar sealer a little before pulling out the jar sealer, and then slowly and vertically pull out the jar sealer while rotating. If you've tried multiple times and it still doesn't seal, you may be able to try another lid. Q4. Which FoodSaver models are the HiFan Jar Vacuum Sealer Kit not compatible with? It's not compatible with the following foodsaver models: FFS005-033, FM1100, FM2000, FM2100, FM2500, FM2900, FM4800, FM4900, FM5800, VS220, VS0100, VS0150, VS0160, VS1120, VS1130. Q5. Why can't the connector of Accessory Hose be inserted? Don't worry, the Accessory Hose Connector doesn't need to be fully inserted, you just need to make sure that it will stay stably in the hole of the jar sealer and vacuum sealer. Some space is reserved for our Accessory Hose Connector, which is actually suitable for more models of FoodSaver. You know that different series of FoodSaver have different calibers of air exhaust holes, some are larger, some are smaller.