Mastercool 82834-E R134a High Side 1/4 in FL-M Manual Quick Coupler

I think I've tried 4 different discharge line (high pressure) couplers for my gauge set. They all had the same issue of the coupler's center pin not extending down far enough when turned fully "open" to fully depress the schrader valve in the discharge line to give me an accurate reading on the high pressure gauge. With each coupler (including the Yellow Jacket one) I had to grab (with a glove on) the extremely hot coupler and line and squeeze them together to get an accurate high pressure reading. This coupler finally fits well enough to open the schrader valve all the way and give me an accurate reading.

I bought a set of these (both high and low) couplers to replace the cheap ones that came on my manifold gauges. The fit is perfect, and the knob allows for easily attaching and disconnecting with pressure in the system. Can't imagine there being a product out there, very highly recommend these.

A great quality product. Thank you.

Well I've only used it once.it will probally be next summer before I use it again.i bought the high and low side,and they worked very well,and seemed of good quality,which for the price they should. Thanks John Gillman

Great Couplers. Much better than the automatic ones. Mastercool puts on their gauge sets. Work perfectly. I don't know why these don't come standard with the gauge set

I love that it has its own shutoff valve. Didn’t think I would use that part of it, but I do.

Bought this to replace the original high side coupling on my Mastercool 89660-PRO5 set of gauges. Works great.

They work perfect

Exactement se qu'il me faut!!