No
No
No r404a is not compatible with r409a, r134a and 404a use the same lubricates and are compatible but r409a use a different lub making them incompatible
No. There'll still be residual traces of R22, even if the cylinder is empty, and it won't blend with the R404A. Furthermore, the R22 cylinder will be labeled as such, and it's actually a crime to have such cylinders improperly labeled.
R134A, R22A, R404A, R410A and many more
Depends who you purchase it from and in what quantity.
TE
Do you mean the letter "U"? "You", provided in your question, is a word, not a letter. And by things, do you mean actual nouns, or just words that begin with the letter?
If you mean letter, as in letters of the alphabet, the word is littera. If you mean letter, as in a letter transported by the postal service, the word is epistola.
Do you mean the letter U or the word you..? Because if you mean the letter U then there are many possible animals.
The pressure of R-410A is significantly higher than other refrigerants R-22 and R-404A. This does not mean that R-410A, or equipment containing R-410A is unsafe. It does mean that technicians must use AC equipment; cylinders and service tools have been re-engineered to handle these higher pressures.
Incompetent and ignorant are mean words. They begin with the letter i.