neo angle shower drain question

i have remodeled my bathroom and its time to reconnect the shower drain
when i was tearing out i cut off the shower drain about 6 inches from the waste pipe tha the toilet and shower go in and capped it off til i was done
my question is when the pipe leaves the shower i know it goes down to a p-trape then over to the waste pipe
how far down from the drain do i put the p-trape
and what amount of fall do i need from the trap to the waste pipe
any help would be greatly appreciated

johnnyhomeowner said:

how far down from the drain do i put the p-trape

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There is no set depth for the p-trap to be. Just make it comfotable for you to work with. It also depends on the elevation of your branch line (main drain where it connects to)

johnnyhomeowner said:

and what amount of fall do i need from the trap to the waste pipe

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General rule of thumb, 1/4" per foot or 2% slope

so the fall on the drain line would set the p-trap distance
the main drain is about 6 inches from the ground
from the drain to the subfloor is about 24 inches
from the drain to the main drain is 4 foot
so i need to get the drop right from shower drain to main drain then p-trap and straight up to shower drain?

johnnyhomeowner said:

so i need to get the drop right from shower drain to main drain then p-trap and straight up to shower drain?

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This 1/4" per foot applies from the P-trap to the vent. After that, you can have the drain going verticle if you wanted. The vent has to be within 5' of the p-trap

thanks crow!