When you use soft copper tubing, you flare the end to make the connection. You put a nut on the tube and then flare the end so that it looks like a funnel. Then you can connect the tube to a fitting and when you tighten the nut it compresses the copper and makes a seal.
a flare
There is a tool available to do it . Basically a flaring tool like is used in plumbing with a different tip.
Yes. Solar means "related to the Sun".
There are lots of ways to join C x C one can use compression unions, C x C unions , couplings, soldering ,brazing mechanical joints, flare x flare
A retaining nut could be the packing gland nut on a valve stem or the nut used on a flare or compression fitting
Flare.
flair, flare
flair, flare
I think it means "we love to help".
In the context of the allergic wheal and flare reaction, the flare is the redness one sees on the skin after an allergen has been injected. The wheal is the indurated (hard) bump.
DRZ is not an acronym that is used in the plumbing industry so it does not stand for anything. DFU in plumbing means drainage fixture unit.
A flare wrench, also known as a flare-nut wrench, tube wrench or line wrench is used for gripping the nuts on the ends of tubes (like automotive brake lines and household plumbing). It is similar to a box-end wrench but, instead of encircling the nut completely, it has a narrow opening just wide enough to allow the wrench to fit over the tube. This allows for maximum contact on plumbing nuts, which are typically softer metals and therefore more prone to damage from open-ended wrenches. See images of flare nut wrenches by searching google and see what purchase links pop up. Cheers