Pressure switch plastic line melts at tank fitting

by Dick Fergus
(Westerville, OH)

I have a 18 year old (like new) sears oil less compressor. Large upright model. I only use it to blow out sprinkler system in the fall. This year while blowing out the system the plastic line blew off at the regulator. I reattached and it blew off again, trimmed the end and it blew off again. Fitting was very hot. I completed the job by placing a cold cloth at the connection. What is going on and how to I repair it? Thank you

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Oct 04, 2015
Pressure switch plastic line melts
by: Bill

It sounds like the compressor is now getting hotter than it used to, Dick.

Is it a maintenance issue, or are you exceeding the compressors duty cycle? I can't tell from here.

I'm surprised they use a plastic tube for that. Cost saving I guess.

If you are confident your compressor is working properly, I suggest you change it out for a 1/4" copy tube. You'll need fittings for that, soft copper tube (usually available from a plumbing store), and if you haven't got one, a tube bender is absolutely necessary to shape the copper tube, else it will kink and break.

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