some questions

a few more questions:

-if my bathtub drain pipe is 2" does the p trap off the tub need to be 2" or can it be 1.5". the vent is 1.5" does this matter?

- can a toilet 4" waste pipe have a 90 degree bend in it laying horizontal and if so does it need to be a long sweeping one

- when cutting a wye or T into a cast iron main stack, what fitting is required if the line coming in is ABS 2 or 3". do i need a cast iron fitting?

- does a vent care if it has a 90 degree bend in it versus two 45's

- can i use flexible water supply hoses (typical for sinks) to supply a shower? thinking from the shutoff to the actual shower control so a run of 10" or so - otherwise i have to reroute the existing copper

thanks

a few more questions:

-if my bathtub drain pipe is 2" does the p trap off the tub need to be 2" or can it be 1.5". the vent is 1.5" does this matter?

Click to expand...

Most tub trap arms are run in 1-1/2"

- can a toilet 4" waste pipe have a 90 degree bend in it laying horizontal and if so does it need to be a long sweeping one

Click to expand...

It can have 135 degrees of change,
Your inspector may allow medium bends after the vent on the trap arm, but not on the rest.
Long turns and 45's.

- when cutting a Wye or T into a cast iron main stack, what fitting is required if the line coming in is ABS 2 or 3". do i need a cast iron fitting?

Click to expand...

If you are cutting into a cast stack, use a cast iron no-hub fitting with shielded no-hub couplings.
You will spend less money that way, it will look nicer, and it will support the stack better.

- does a vent care if it has a 90 degree bend in it versus two 45's

Click to expand...

The vent doesn't care.

- can i use flexible water supply hoses (typical for sinks) to supply a shower? thinking from the shutoff to the actual shower control so a run of 10" or so - otherwise i have to reroute the existing copper

Click to expand...

Don't use lav supplies for a shower.
You will need to support the shower valve in the wall solidly, once that is done, you could run PEX, which is flexible, and rated for inside the wall use.

thanks

?s

-if my bathtub drain pipe is 2" does the p trap off the tub need to be 2" or can it be 1.5". the vent is 1.5" does this matter?

The size of the vent does not matter. The drain line CAN be 1 1/2", but 2" is better and that is the only size I have ever used.

- can a toilet 4" waste pipe have a 90 degree bend in it laying horizontal and if so does it need to be a long sweeping one

It can have the turn, but the fitting depends on your code and inspector.

- when cutting a wye or T into a cast iron main stack, what fitting is required if the line coming in is ABS 2 or 3". do i need a cast iron fitting?

A cast iron one will fit better and require less room to install.

- does a vent care if it has a 90 degree bend in it versus two 45's

No.

- can i use flexible water supply hoses (typical for sinks) to supply a shower? thinking from the shutoff to the actual shower control so a run of 10" or so - otherwise i have to reroute the existing copper

They are specifically labled "NOT for use in concealed locations", which your installation would be. Besides they are so small internally that your shower's flow might be affected.

Excellent - thank you

Regarding the 135 degrees in a toilet.

Off the toilet it hits a 90 then another 90 a few feet away straight into the main stack where it drops

Does the first 90 at the floor count? Does the last at the stack?

Or only the one in the middle?

Cheers

turns

Only the one in the middle and you would reach the 135 degree limit if you added a 45 in the horizontal line along with the 90.

hj said:

Only the one in the middle and you would reach the 135 degree limit if you added a 45 in the horizontal line along with the 90.

Click to expand...

Really how come? The 1st 90 is after the trap so I see no reason why it wouldn't count but again your guys code seems always differ a bit from my code.