WATCH ME PUMP 5000 PSI out of 2 hand pumps tethered together!!! 🤣

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Healthservices

Healthservices

Member
Aug 29, 2020
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SoCal, United States
So I took a look at my failed hand pump and it looks like there was a piece of brass junk in the seat easy fix, so now I have two hand pumps. Wondering if anyone ever tethered two pumps together. Maybe have two people pump to speed filling a pcp or tank? Or mount the two with one handle?🤔 But how would you tether the lines together? Maybe a one way valve so one could be used if the other is bad? Boy, I can never leave anything as is. 🤪

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Two pump cylinders on one handle would definitely double your air output per stroke, if you could muscle it. I would think you would want to run a line off each pump output to 1 way valves on a Y fitting, then run another line to your female foster/fill probe with a bleeder on this end. The 1 way valve would be important so you arent overpowering one pump with the other. Basically with this setup everything would work independently but on the same push stroke. 

With this system to depressurize, you would bleed the bleeder from the line going to gun, disconnect gun, then bleed each pump using their built in bleeders. 

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Just got at home depot. $5 for fitting. I think the foster adapters have to be ordered. Unless I want to do a trip to JB or a paint ball shop.
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I just saw this. That Tee is only rated to 700PSI. You will blow it into a grenade of shrapnel if you use that with HPA. You need to make sure any fittings you use are HPA or 4500-6000psi rated. Pipe connectors are 500-700psi 
 
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I think I got the power to do it taken care of. I am over 50 years of age. So I do have resources other than just muscles.

The other issue I have is that one of the pumps requires 17.5 inches of travel while the other only 17 inches. It does not seem like I can connect the bases together, as one would have to have 1/2 inch extra movement.
 
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I connected the two lines together and drilled extra holes in the handle to do some testing. It looks like it does take a bit of effort. But with the two lines connected (so I'm just filling the lines and the filter) I can get over 5000 psi. Well at least one of the guages says 5k the other is a bit lower. 

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I know it will take a lot longer to fill a pcp depending on which bottle I have on my pcp. I think it took about 25-28 pumps to fill the line in this configuration.
 
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I wonder if I just had a leak the first time I tried but I put the hose output from the first pump into where the gauge would be on the second hand pump. I think it should have worked. 🤔

Oh notice how I kind of freaked out when I saw the pump pressure go over 5k. I did not think it would go up so fast.

Also note that the pumping slowed as the presure went up it only needed about 90 psi to keep it pumping over 5k. I'm thinking I could lower that psi to where it would stall at 4500 or so. 
 
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Well apparently there is a lot of tweaking to be made. I made the left pump loose at the base so it could go full stroke while the right one was bolted completely down so it could go 17.5 inchs. I GOT it completely backwards. Doh! So only one pump was getting a full stroke. And the one hose will go into the gauge port of the other pump and stay sealed now! No adapter needed! Although I will probably put a quick connect and one way valve on the gauge port.

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The double pump setup will fill the line with the blue filter to over 4500 in 13 pumps now. 👍
 
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