Air compressor repair


Old 10-06-20, 11:19 AM
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Air compressor repair

I have one of the little 3-gallon pancake air compressor. Bought it in August but it quit filling a month or so ago. I don't use it for much and as such didn't buy the extended warranty on it. Anyway, someone here suggested it could be a valve reed or something else easily fixable so I started taking it apart last night. The problem was immediately evident. There is a small aluminium tube running from the compressor itself into the tank which had broken. Has anyone ever replaced this before? It's easy to remove the whole thing. I'm hoping it's the same size as a copper refrigerator water line in which case my local Ace Hardware should be able to fix me up. I hope.
Any Thoughts?
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Old 10-06-20, 06:33 PM
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Welcome to the forums.

I've never been fond of aluminum lines on a compressor. The heat makes them brittle and they crack.
You should be able to replace that aluminum with soft copper.

A small compressor could use 1/4" or 5/16" or 3/8" tubing.

You could post a model number or post a picture of that area.
Old 10-07-20, 08:16 AM
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I'd be trying to figure out how to replace it with a piece of rubber air line.
May have to tap out the head to fit a barbed fitting.
Old 10-07-20, 08:37 AM
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Copper may be the best material being the temperature could be critical for some other material and aluminum may have been a poor choice because of expansion and contraction.

Last edited by SandburRanch; 10-07-20 at 11:24 AM.
Old 10-07-20, 11:14 AM
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OP Any Thoughts?
more thoughts:
I'm picturing a broken aluminum tube that was stiff legged to save on material when
a 180 loop of tubing should have been used to compensate for expansion / contraction length and vibration.
Old 10-08-20, 04:59 AM
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The tubing size is likely metric.
Metric tubing and fittings are available but you need to carefully measure what you have.
Tubing is sized by outside diameter.
Replacing with rubber would be ok but it would need to be rated for pressure and temperature.
Hydraulic hose would work.
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