Evacuation manifolds

[killermiller]

Has anyone or does anyone use these? Do you think that they really improve readings?

[DagoDuck]

If I had the money for this, I would buy one. I would say that this tool is very useful. Thereby you can quickly determine whether the system has a leak or not.

[godmod]

which type do you mean? such a thing:
http://i6.ebayimg.com/05/i/000/ba/8c/7c16_1.JPG

If yes, I don't think it is very useful. It is not accurate enough to determine wether you have a proper vacuum or not and if your unit is leak free or not - you see this also on the normal gauges. So go for a digital vacuum gauge or for a real vacuum gauge like this:

(this is not my picture. it belongs to "wirehead". i hope he is not mad about me now)

[killermiller]

I am referring to these (http://www.yellowjacket.com/HVACRProducts.asp?t=HVACR&l=2&c=17&p=57).

[wdrzal]

Buy 2 valve core removers,you'll be better off

Friction is critical at very low pressurers.........

[killermiller]

I wasn't thinking about buying one. I was thinking about making one. Not as neat as one of those but the same idea.

[{.bLanK} GoD]

Your link on post #4 is broken killer.

[killermiller]

Works fine for me. It is just the evac manifolds from Yellow Jacket. Here is the pic

[{.bLanK} GoD]

Weird. It works me me too now.
If I remember I'll get a pic of our setup we use for commercial evacuation.

[DagoDuck]

So go for a digital vacuum gauge or for a real vacuum gauge like this:
That's what I wanted to say, digital vacuum gauge.

[godmod]

i think the "evac manifolds from Yellow Jacket" is just the same as the ITE above. don't use those, you don't have enough accuracy. if you build one, i don't think that you get the accuracy too hehe

[Xeon th MG Pony]

Buy a 4 port service manifold, 2 Core removal tools and she'll work a trick for ya like nothing. For the vacuum line either use 3/8th copper or use the Yellow jacket high vacuum hose (Flexible SS 3/8 pipe for deep vacuuming systems.)

For vacuum guage I recomend the supco VG64.

[killermiller]

I already have a vg64 and a 4 port manifold and one core remover. I also have 3/8 hoses with 1/4 fittings. I was just looking for a way to decrease vac time even more for less $$$. Those specialty SS vac hoses are about $100

[godmod]

heat up the unit. i think thats the cheapest method to improve the vacuum and shorten the vac time.

[Xeon th MG Pony]

well as godmod said, only cheap way to do it is heat it up, albeit geting the SS hoses and using copper lines to the unit is the only other way to get a faster and deeper vac.

As the old saying goes: Speed costs, How fast do you want to go?

[killermiller]

Sounds like its time to get a heat gun.

[godmod]

i thought about building a tent aroung the unit and puting an electical heater into the tent :) so that the air gets heatet up inside...

[killermiller]

That is an interesting idea too.

[killermiller]

Well I couldn't get the idea out of my head to make a manifold to attach to my vacuum pump. So I went to Home Depot and spend just a few dollars for fittings and made one. The fittings on the manifold are 3/8npt to 3/8 flare. I had an old 1/4 hose that had been melted by my torch so I cut it up and used the ends for my adapters. I also already had the 1" tube and caps that was going to be an accumulator. The straight adapter I made I had a little trouble with since I cut the stem that would go into the hose too short. The angle one I am pretty happy with.

[teyber]

beautiful!

Nice braze job! id love too see that cleaned off.

harbor freight has heat guns for very cheap... like 10$ or so. It helps boil moisture also.

Regards

[n00b 0f l337]

You remove the rubber and such first right?

[killermiller]

beautiful!

Nice braze job! id love too see that cleaned off.

harbor freight has heat guns for very cheap... like 10$ or so. It helps boil moisture also.

Regards

Then they will charge another $30-$40 to get it to AK.

You remove the rubber and such first right?

Yup.

Anyway this was just to satisfy the urge. I may buy a 3/8" male to 1/4" female since its aukward since the threaded part doesn't twist.

I also didn't account for the handle so unless I can extend the handle someway it will probably be without a handle for a while. There is a 6" brass tube but that was like $6:eek:

[teyber]

sorry for my ingorance, but what purpose does this server? (asking question not saying there isn't a purpose!)

My guess would be to directly hook up to system, or hook one end up to system and one to manifold...

Looks very nice cleaned off :D

[{.bLanK} GoD]

I hope you didn't go to all that effort to attach your vacume gauge there?
I have seen some of our contractors connect their vacume gauge to the vac pump via a Tee. This is no good as it will give you false readings, pulling vacume instead of actual vacume. And you cannot hold a vacume with the gauge attached there.
I've told our guys at work they aren't doing it right, but it's a bit like trying to teach an old dog new tricks.

[killermiller]

Nope. It serves the same purpose as the Yellow Jacket ones. Less restriction. I will still take vac readings from the my core remover.