Is there a special j pipe for a shower drain? Or do you just use 90 to make the j pipe and if so what are the specs so no sewer gas leaks...

Whoa! Not so fast there Markee. That "j pipe" is called a trap. And before I even answer I want to know a little more about this project. New installation or are you replacing a existing shower? What size is the drain pipe the trap would connect to? What kind of a shower? Tile? Plastic or fiberglass shower enclosurer? How far along are you on this? What "specs" are you asking for?
I'll wait on your answer, Tom

J pipe for showers

Is there a special j pipe for a shower drain? Or do you just use 90 to make the j pipe and if so what are the specs so no sewer gas leaks...

Whoa! Not so fast there Markee. That "j pipe" is called a trap. And before I even answer I want to know a little more about this project. New installation or are you replacing a existing shower? What size is the drain pipe the trap would connect to? What kind of a shower? Tile? Plastic or fiberglass shower enclosurer? How far along are you on this? What "specs" are you asking for?
I'll wait on your answer, Tom

Plastic shower new install 2 inch pipe will be inclosed spec on the length of the trap from bottom of the pan,is more distance better

plastic shower new install 2 inch pipe will be inclosed spec on the length of the trap from bottom of the pan,is more distance better

The distance, (length of the trap raiser or shower stubup) between the drain and the trap can be any length. One is not better then the other. Regards, Tom

Now do you just use 90s to make the trap?

now do you just use 90s to make the trap?
No, You purchase the trap ready made. Tom