mike93lx
ALLIANCE MEMBER
Mapp gas isn't made anymore and hasn't been for a while. Yellow cans are "mappro" which burns a little hotter than propane, but not significantly
1/2" copper for air lines
- Thread starter Jason280
- Start date
Mapp gas isn't made anymore and hasn't been for a while. Yellow cans are "mappro" which burns a little hotter than propane, but not significantly
metalmagpie
Well-known member
Half inch fittings are cheaper than 3/4". I wish I had a pile of 1/2" copper. Mine is all 1".
metalmagpie
metalmagpie
sberry
Banned
In a lot of cases bigger really doesn't hurt,,, it just doesn't help much. Electric is the same way. You can wire 20A circuits with 10 wire but it doesn't save any electric. It might if the actual load was 20A on 24/7 with 100 ft circuit for decades but to zing a board off with a saw once in a while or for loads less than that it doesnt.
We in small garages are hooking this to comps where a 3/8 will drain the comp connected to a sandblaster in a hurry, pipe size is not that relevent.
There was the trucker on here, judges talking about a comp for his shop and was convinced he needed more than 5 up because he has a truck with big tires. It might seem like this to start with but,, he is a 1 man shop and not a truck service center with multiple guns running doing tires every day. A 3 hp will fill a tire as fast as a 5 or a 10 and the only benifit would be to constant impact like a NASCAR pit crew on 32 wheels, again more work than a single guy can do. There would only be delay with a large gun right after the kick on if one exceeded demand.
He needs a good comp or more accurately a 2 stage to pump hi pressure tires and enough to run a gun to do lug nuts,, by the time he got to another set it would be recovered.
He needs a 5 with big tank, a 7 1/2, but something practical that would run on the power he had, something that might run a da sander well enough too.
The effort to come up with 3 phase conversion and extra power for 10 up wasn't going to save. Same for mine, I simply have an extra old comp for backup and severe demand, I rarely use it, would only save a minute or 2 on occasion if I did. I have enough tank I am usually done or time cycle out of habit where it doesn't make any difference. I do use the extra tank from unit 2. Breaker off to it unless needed.
We in small garages are hooking this to comps where a 3/8 will drain the comp connected to a sandblaster in a hurry, pipe size is not that relevent.
There was the trucker on here, judges talking about a comp for his shop and was convinced he needed more than 5 up because he has a truck with big tires. It might seem like this to start with but,, he is a 1 man shop and not a truck service center with multiple guns running doing tires every day. A 3 hp will fill a tire as fast as a 5 or a 10 and the only benifit would be to constant impact like a NASCAR pit crew on 32 wheels, again more work than a single guy can do. There would only be delay with a large gun right after the kick on if one exceeded demand.
He needs a good comp or more accurately a 2 stage to pump hi pressure tires and enough to run a gun to do lug nuts,, by the time he got to another set it would be recovered.
He needs a 5 with big tank, a 7 1/2, but something practical that would run on the power he had, something that might run a da sander well enough too.
The effort to come up with 3 phase conversion and extra power for 10 up wasn't going to save. Same for mine, I simply have an extra old comp for backup and severe demand, I rarely use it, would only save a minute or 2 on occasion if I did. I have enough tank I am usually done or time cycle out of habit where it doesn't make any difference. I do use the extra tank from unit 2. Breaker off to it unless needed.
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Damn, I got a little sticker shock just buying 1/2" fittings, couldn't imagine buying a bunch of 3/4 or 1" stuff.
ez-duzit
Well-known member
For my 4-car garage sized shop I'm installing 3/4" copper mains with 1/2" copper drops. Many more 1/2" fittings than 3/4". This just isn't the place to cheap out.
sberry
Banned
3/4 are not teribly expensive for elbows and couplings, t's either. Other fittings go up in cost, street L is 3 times the cost of a common 90. But as I said in the last babble, bigger won't hurt but there is very little gain in these type of garages. The comp only makes so much and the demand at one time is so little. If it's going to a 1/2 drop anyway and a 3/8 hose a few ft of the main being 3/4 doesn't mean much except for extra fittings in another size.
sberry
Banned
A guy doesn't need to use every fitting they ever invented. I saw a system here by a fine member, there was a lot of fuss about what a fine job it was but,, a dozen valves where 4 would have worked, pipe in 3 sizes, 6 fittings where a T would have worked, almost 20 fittings for a drop, 6 drops where 2 would have sufficed and had to wait and save to do it.
I can still remember one of the first I did, inch where 1/2 would have worked well, all in fear of a little pressure drop that never happened. As I now recall an old pro tried to tell me this but I didn't catch it at the time.
I can still remember one of the first I did, inch where 1/2 would have worked well, all in fear of a little pressure drop that never happened. As I now recall an old pro tried to tell me this but I didn't catch it at the time.
When I switched from PVC to black pipe, I didn't buy my fittings all at once. Every time I made a trip to the big box store, I grabbed a handful of this or that. I carried a list of what I needed on a 3x5 card and marked off what I had bought for a running total.
rlitman
Well-known member
That makes sense for black pipe, where fittings are just sold by the piece.
For copper, certain fittings are much cheaper in bulk
jkherd
Well-known member
I am on the fence over this. I like the look of the copper lines but looking at the black pipe for cost.
LS6 Tommy
Well-known member
Plumber's wipe their joints. HVAC techs do not. We prefer a shoulder on the joint and if we get a "***" we knock it off with the end of the roll of solder...
Tommy
ddawg16
Well-known member
One of the reasons for wiping the joint is it cools it off quicker.....less chance of things moving.
I wiped all mine.....It just looks better
I wiped all mine.....It just looks better
LS6 Tommy
Well-known member
We do not do it because it eliminates the chance of getting moisture in the system if the joint has a leak. Water lines don't have that issue.
Tommy
Dan in Pasadena
Well-known member
You’re talking about a regualr stationary home air conditioner, right? Not a window air conditioner?
If you plumb it in series the water will condense out of the air and a water filter down line from it will still be needed, right?
Anyone using 1" copper - 10 pack of 1" 90's for $7 from Amazon Warehouse
https://smile.amazon.com/gp/offer-listing/B01GQGXYH2/?ie=UTF8&condition=all
https://smile.amazon.com/gp/offer-listing/B01GQGXYH2/?ie=UTF8&condition=all
Attachments
D45
Well-known member
Wont black pipe rust more inside, compared to copper?
ez-duzit
Well-known member
Fix Until Broke
Well-known member
It could be either one, both do the same thing, just one is larger than the other.
It depends on how you plumb it and how "automatic" you want it to be. If you plumb it "uphill" then all the water will drain back into the tank and you drain it just like you would today. You can also put a drip leg on the outlet with a ball valve and bleed it there or do both.
Theyeti83
Active member
Just installed my own set up off a 20 gal compressor. 2 fittings inside. One outside.