Author Topic: Fill adapter hoses  (Read 500 times)

Briar Patch

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Fill adapter hoses
« on: April 10, 2018, 06:59:02 PM »
Just throwing this out there ...

While searching out components to build a fill adapter I happened across what appears to be an excellent source for hoses.

Replacement hoses for grease guns.  Please make sure you specify "5000 psi" in your search
Small diameters, high pressure ratings, assorted lengths and they are cheap. 

As long as NPT threads will work for you, you're in luck.   All of the ones I was looking at have 1/8" NPT threads.
There are a lot of components out there that have BSPP threads, which are not compatible - so that is something to verify before spending your dollars.

Various thread adapters are available, but the price certainly cuts into the money you saved.
« Last Edit: April 12, 2018, 04:00:19 PM by Briar Patch »


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Monkeydad1969

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Re: Fill adapter hoses
« Reply #1 on: April 10, 2018, 11:26:14 PM »
Thanks for the info.  Can you post the website here for us?
Joe
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Alan

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Re: Fill adapter hoses
« Reply #2 on: April 11, 2018, 05:35:45 AM »
They are rated at 3,000 PSI (a few are 3,500 PSI), which means they can only be used for tank to gun use, assuming the PSI isn't exceeded. This said, my big issue with them is the internal volume. It may seem trivial, until you calculate the volume compared to a 4,500 PSI, micro-bore hose. Cheap yes, practical, no.
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

Briar Patch

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Re: Fill adapter hoses
« Reply #3 on: April 11, 2018, 06:53:29 AM »
As with anything a certain amount of due diligence is sensible.  It certainly wouldn't be smart to get a hose that isn't rated for the pressures you would be subjecting it to.

The hose listed here is the first one that popped up for me  at Amazon when I Googled "replacement grease gun hose"
https://www.amazon.com/OTC-24-Grease-Gun-Hose/dp/B00EVPLUSG
Description states it has a working pressure rating of 5800psi.   I believe most of them would be rated higher than 3000psi

When I was searching various sites that make hydraulic hoses most of what I found in the small hose category were rated at 3000psi.  And for the higher pressures it was looking like 3/16 was the smallest I could get unless I wanted some other kind of tubing that appeared to me to be more of a plastic.
Although I found a few combinations that I I felt comfortable going with - shipping would have made it
More sensible to spend $35-40 for one of the micro bore hoses on airgun sites.

I didn't track down the Internal diameter of any of the pre-made hoses like in the link, but I figured  that if 1/8“ fittings are standard I would gamble on the inside  being being less than 1/4 inch.

I've not done any  calculations at all regarding hose volume. Indeed they may not be practical.
Thank you for pointing that out Alan. I'd bet that since you did mention it you have done the calculations and it is not practical.

Quite frankly after all of the time that I spent searching and researching fill adapter components I would have been better off to have just purchased a complete adapter assembly.  But, I like to research and  tinker so.... I did. 

Anyway - if you are looking for another option, replacement lines for grease guns are something that may meet your needs. It's always nice to have options, even if some aren't very good - causes you to at least think a little bit.  ;D

« Last Edit: April 11, 2018, 06:56:09 AM by Briar Patch »
  • Payson, UT

Briar Patch

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Re: Fill adapter hoses
« Reply #4 on: April 11, 2018, 08:15:26 PM »

You weren't foolin' -  1/4" inch hose will rob you of about 4 times as much air as the 1/8" diameter one.  The 3/16" dumps over twice what 1/8" loses.

I don't know what kind of losses everything works out to but if you have  microbore hose and the amount of air you bleed off each time you fill your gun is as much air as you would use in firing off 1 pellet, and now you're using 1/4" hose ... now your shot count would be down by 4.
30 good shots per fill just dropped to 26 with 1/4" hose. 

I did find a bit of a work around on an old GTA thread - slide a length of weed eater line in the hose to reduce the volume.  That'd help.  ???

Much simpler to just go with the microbore hose in the first place.  :)

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Briar Patch

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Re: Fill adapter hoses
« Reply #5 on: April 11, 2018, 08:17:46 PM »
As with anything a certain amount of due diligence is sensible......

Uh-huh - Preach it Briar!   ::)
  • Payson, UT

int3man

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Re: Fill adapter hoses
« Reply #6 on: April 11, 2018, 08:47:02 PM »
Some where I have some 6 foot .032 Bore hoses.  I'll be back on Monday and search if you are interested PM me.  1/4 FNPT on one end and 1/8 MNPT on the other.

Off to Chicago
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grumpy

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Re: Fill adapter hoses
« Reply #7 on: April 12, 2018, 02:22:58 PM »
Not a chance in hell I'd use a cheap 3k line on my guns. Something best not to skimp on
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Briar Patch

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Re: Fill adapter hoses
« Reply #8 on: April 12, 2018, 03:57:31 PM »
Not a chance in hell I'd use a cheap 3k line on my guns. Something best not to skimp on

Amen! I agree 100% with Grumpys statement!

If after reading all of the previous posts on this topic you are still considering using a replacement grease gun hose - be selective.

If you Google "5000 psi replacement grease gun hose" you will find there are many available that have the required pressure rating to meet the necessary safety requirements.

If you do not add "5000psi" you will find many with too low of a pressure rating to safely use with your PCP gun.

I apologize for not being more specific in my original post. It's been changed.
  • Payson, UT

bnowlin

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Re: Fill adapter hoses
« Reply #9 on: April 12, 2018, 06:48:07 PM »
I would be concerned about the fittings first of all and the size of the bore.
Bob N