Help identify picture

Hey, I am trying to find out what these are?? They say "Allin Liquid Eye" I was guess sight glasses for a steam boiler, but I am not for sure????

That is not what you have.

A refrigeration sight glass as shown in the link is a double male flare that goes in-line after the condensor coil but before the expansion valve in series as I was talking about in my other post. These are very common on larger tonage systems.

Yours is different as it either has double female or caped on one end as I can't tell from the picture on the right side but appears to be caped.

We can not use quick disconects in refrigeration as they leak either on pressure but will diffently leak on suction. We have to evacuate the system every now and again and while under vaccum a quick disconect will leak more than when having pressure.

Theres no since in having a removable sight glass as a sight glass has one purpose and that is to tell if liquid refrigerant is present in that part of the system.

T_Bone

We use the refrigerant sight glass to see bubbles in the high pressure side of the refrigeration cycle (bubbles not wanted here) therefor they need to be installed in the flow loop.

Copper flares are used for pressure and hold well up into the 500psi range as many of refrigerant systems use this method without problems.

The sight glass appears to be plumbed as a dead end system leading me to think as Mark or Casepower on checking for existing pressure flow in many different places in a low pressure system. Quick disconnects do not adapt well to a vaccum system.

T_Bone