Qians S300 Pro Diving Tank Equipment,Mini Scuba Cylinder High Pressure Air Pump with 5-12 Minutes Scuba Tank Refill Adapter for Underwater Diving Breathe Training

First, I want to state that I am a PADI certified diver. So everything to follow assumes that you know what you are doing. I wanted to drop a review since when I made the purchase, there were not any adequate ones, and took a chance.I ordered the S300 consisting of the tank, regulator, and scuba refill adapter. After having it for about 60 days, I am happy with the tank.I have a large scuba tank that I use to fill the Smaco tank. When I have a fresh fill of the large scuba tank, I am able to fill the Smaco to about 3000 to 3100 PSI. The large scuba tank that I have is filled to 3500 PSI when it is full. Thus, it is able to push up to 3100 PSI to the Smaco when my large scuba tank is full. When the Smaco is filled to 3100 PSI, I am able to use it underwater for about 6 minutes and 30 seconds when breathing normally, and up to 7 minutes and 30 seconds when holding my breath a little. Note that this is in a 6 foot pool, so I’m not that deep. The 12 minute breathe time that is advertised is not true for a normal human being.As the PSI drops in my large tank, I am not able to fill the Smaco to 3100 PSI. As an example, when my large tank is down to 2000 PSI, I could only push about 1700 – 1800 PSI into the Smaco. With that PSI, I will only get about 3 – 3.5 minutes of breathing time. In any case, it take less than 10 seconds to fill the Smaco with the large scuba tank.In terms of what I do (pool repairs), this tank is perfect. I am still wondering if I should keep on filling it with a large scuba tank, or opt to buy into a Yong Heng high-pressure air compressor. They are in the $300 range, and require a lot of TLC with water cooling and such. There are also options to get a 12v portable high pressure compressor, but they also require some TLC and are also in the $300 range. So for now, I will keep on filling the Smaco with my large scuba tank. I am very happy that I did not go the manual “bicycle style” pump route. Watching the Youtube videos, I can see it takes forever to pump it with one of those. Search Youtube for “how many pumps the 3 stage hand pump need to fill a 18 cu in cylinder to 3500psi“ and you’ll see what I mean.However… If you are a certified diver, and using this for a emergency air source, then you should be AOK.. You’ll have a large scuba tank, or have rented one to easily be able to fill this with the scuba refill adapter.Bottom line is that the tank and the capacity is great for my use. Giving 4 stars only because of the misinformation regarding the breathe time. If you purchase, just be warned that you will need to make an additional investment with either having a large scuba tank or invest in a high-pressure compressor to fill the Smaco.

Am I missing something?1/Pump: I tried several times to fill the tank manually. I read the reviews and understood I would need to spend sometime doing so. Still.. I pumped for a good 10mins and the needle did NOT move a bit. Tried to reach out to the seller.. still waiting for a response after 3 weeks and 3 messages.2/I bought a tank adapter.. tried that too... same thing the tank is not filling. the needle is not moving at all.Also contacted the seller on that..Am I missing a step or something?

I was missing a part from my order. I reached out to the seller and never heard back. Everything else was just as pictured. I ended up having to go straight the the maker of the product to get the problem resolved.

Awesome buy, it may seem cheaper to buy this kit piece by piece, but in the long run its much better especially if you get the protection plan, I tested product to 3 bar even though the gauge says safe ends around 3.5 pumping is VERY difficult at that pressure level, don't expect to fill up the tank on site by hand, I was able to get a full 12 minutes after first on top breath and holding in between, I feel like higher times are 100% possible, purchased for shallow dives in hiking locations with depths no more than 20ft, check your gear when you get it, make sure you watch the how to videos if you don't know about equipment like this, overall great product and please remember dive times depend on YOU and the LOCATIONS not just the equipment before you try to tell someone how long they can dive with this

Anyone using compressed air without training is begging to get them self’s killed. Do yourself a favor and take the scuba classes and learn how to dive. These things are dangerous. Also, they are not innovative at all. They have been around for years under the name air 2.

Pump takes too many pumps to fill the tank.Exhausting!

Excelente muy bueno llego muy bien

The description is completely misleading. Let's run through the math:This is a 6 cuft tank when filled to 3000psi. The gauge goes to 300psi, so we are looking at 1/10th the volume or .6 cuft.The average person breathes about .5 cuft per min at the surface. For each atmosphere (33 ft or 10 m) you increase by another .5 cuft. This means that at 99fsw (feet of salt water) you breathe 3x what you breathe at the surface or 1.5 cuft/min. This means that .6 cuft would be used up within about 24 seconds. Cut that in half for a panicked diver (which they probably are at this point since they are idiots and ran out of air.Conclusion, this would be fun to play with in the pool (ignoring the ridiculous bike pump that will feed toxic air, even with the alleged oil/water separator but if you are planning on using this as a back up during scuba diving then you are asking to die. Think about your training and what you learned in chapter one of the book!

After some confusion with the instructions typical Chinese instructions not really clear and the photos were a little misleading. Customer service was great. Finally got it operational works really well. Using it for pool maintenance.Filling the tank with the pump will give you a really good workout. About 800 strokes to fill the tank. There are some good YouTube videos.Fun piece of equipment. Scuba certification is advised.

A Excellent product for intended purposes! Please be certified when using! A Fantastic company helped pay duties! Thank you! Be dafe!

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