Question about pressure testing Mini Split

[Firebrick43]

The factory flares on most of those chinese minisplit linesets are very poor. I installed a Senville unit for a friend, and one flare shared off before torque was achieved, and another failed months later with a leak.

I got a bundled kit with some Mitsubishi minisplits, and the linesets were actually made in the USA, and those flares were good. Been holding up like 4 years later with no issue.

FWIW: I always pressure test at 400 PSI for 24 hours.

Its been 9 years ago since I installed my Mitsubishi, without pulling the covers I am pretty sure they were mueller line sets.

They are very good and worth the extra money to buy over the Chinese ones. They bend much easier without kinking as well. They include nice flares and seem softer so making new flares when shortening are easier.

The last gree mini I bought paid 58 dollars more for the mueller line set at supply house over the ones that the gree dealer was selling

 

[jjrbus]

There is a go no go flair gauge that I seem to be the only person that uses. When I put 3 Daikins in several of the factory flairs failed. The Senville I recently put in all flairs passed. Cut 2 off anyway. I know real men don't need a flair gauge.

 

[American Locomotive]

Its been 9 years ago since I installed my Mitsubishi, without pulling the covers I am pretty sure they were mueller line sets.

They are very good and worth the extra money to buy over the Chinese ones. They bend much easier without kinking as well. They include nice flares and seem softer so making new flares when shortening are easier.

The last gree mini I bought paid 58 dollars more for the mueller line set at supply house over the ones that the gree dealer was selling

Yes, that's right. They were mueller.

 

[danski0224]

I know real men don't need a flair gauge.

Some people might just have a flair for flares...

 

[Firebrick43]

Some people might just have a flair for flares...

Maybe real men have a flair for reading calipers?

 

[danski0224]

Maybe real men have a flair for reading calipers?

Only if that real man drives a real truck...

 

[bob smith1]

I like to hand around a micrometer at a 'mens gathering', just to see the caveman brain at work.....lol I actually had one say, "wtf is that". Told em it was a "precision C clamp"..... Man cards were docked after that stupid question.

The most common issue in da flurs is a blem on the sealing face from the tool. These stupid things need to move to ORF with PTFE rings. We just have to keep being stupid.

 

[aggie113]

Its been 9 years ago since I installed my Mitsubishi, without pulling the covers I am pretty sure they were mueller line sets.

They are very good and worth the extra money to buy over the Chinese ones. They bend much easier without kinking as well. They include nice flares and seem softer so making new flares when shortening are easier.

The last gree mini I bought paid 58 dollars more for the mueller line set at supply house over the ones that the gree dealer was selling

Well... here's hoping the Tosot(Gree) unit I put in recently lasts, paid for a longer lineset, but not a better quality one

 

[Firebrick43]

Well... here's hoping the Tosot(Gree) unit I put in recently lasts, paid for a longer lineset, but not a better quality one

Make sure the line set is well protected. The white polyfoam that they are putting on the cheap line sets(compared to the rubberized black foam) is causing pin hole leaks for a lot of people as it breaks down.

 

[aggie113]

Make sure the line set is well protected. The white polyfoam that they are putting on the cheap line sets(compared to the rubberized black foam) is causing pin hole leaks for a lot of people as it breaks down.

Yeah, already caught it sweating in the summer heat and the vinyl wrap is crumbling. Plan to wrap it in something tougher to help protect it: https://www.amazon.com/dp/B0FCF5TKFL?tag=atomicindus08-20
I would consider trying to replace the foam but worried it would increase the chance of leaks to handle the lineset that much.