The wonderful "China pump"

[Nomadic Pirate]

They'll come back,......both in availability and low price,
just give it some time for things to settle

[anti-squirrel]

Out of curiosity I looked and it doesn't seem like they are "cheap" anymore.  Seems like all over $100?

Depends on where you find them.  Sometimes EBay has the best deal, sometimes Amazon.  You can also try Ali-Express.  A couple summers ago, they were available for under $40; I should have bought several, but my Taousa has been used very heavily and still remains perfect.  Up until very recently, I was a dedicated handpumper.  I'll likely be buying another China-Pump once the COVID-thing stops impacting everything and prices settle back.  heck, I'll probably buy another HP compressor, too- I'll need to if I get Sonja the Leshiy 2. 

[UnderPressure]

Can you boost them with a shop compressor?

Yes: https://www.gatewaytoairguns.org/GTA/index.php?topic=172691.msg155967221#msg155967221

and

Yes: https://www.gatewaytoairguns.org/GTA/index.php?topic=174642.0

This should also work with SCBA or nitrogen tank as inputs. This provided a very low pressure regulator is used.

In this way a person could use a SCBA or nitrogen tank with a lower than useful pressure to boost the pressure in another SCBA tank.

[Ronni]

Guys today I decided to take my chinese pump apart since it has been really difficult to up/downstroke, made grindy noises and also leaked air.

Turns out only that little green piston o-ring was damaged. Replaced it with the spare of my old hatsan pump, cleaned and relubed with silicone oil.

It works like its brand new now, very consistent on every stroke.

Has anyone filled his up with water/antifreeze? Have seen people doing it on Youtube.

[Nomadic Pirate]

Guys today I decided to take my chinese pump apart since it has been really difficult to up/downstroke, made grindy noises and also leaked air.

Turns out only that little green piston o-ring was damaged. Replaced it with the spare of my old hatsan pump, cleaned and relubed with silicone oil.

It works like its brand new now, very consistent on every stroke.

Has anyone filled his up with water/antifreeze? Have seen people doing it on Youtube.

Fantastic,

those cheap pumps are really something.

[Nomadic Pirate]

Starting to see them slowly coming back on Amazon, slowly cheaper and cheaper

Today's best

[Ronni]

In DE we start to see them below 50 again.

Manny, whats the correct setting for that little valve screw with the oring?

[Ronni]

after my last repair its difficult to pull on the upstroke

[Nomadic Pirate]

Sorry, I'm definitely not the best person to answer technical questions LOL

Honestly, I don't even know what screw you're referring to

[EricFR]

Hello,

For having also a 3 stage china pump, I have to agree that for the price it's a blast (like the YH compressor). I also had the final stage check valve o-ring that was used and was really easy to replace.
Compared to the FX 4 stage turbo pump, the chinese one is much easier to repair. You can open everything easily with fork wrenches and other pliers wrenches. Every seal is done with o-rings, there's no glue or whatever as found on the FX one where you need to heat some places.

Now I've seen that there's also a Chinese 4 stage version, what about this one? Has anyone tested it? I find it quite expensive compared to the 3 stage one. It's almost the price of a Hill pump... (though it could be superior to it in quality  )

[Tonycalves]

Now that I have a Huben I'm in the market for a pump to get to 5k without spending a lot. Need all extra $$$ for ammo now  .  There are a few 5k pumps, want to hear first hand experiences first tho.

[EricFR]

Has anyone filled his up with water/antifreeze? Have seen people doing it on Youtube.

Ron, I've added some antifreeze in the middle tube. It helps keeping the inner high pressure tube cool by adding thermal mass, now the outer low pressure tube gets hot faster than the high pressure tube. In case of leak from the bottom side, the antifreeze would come out rather than going inside of the pumped air.