1950s ptrap

[Matty]

I'm remodeling my guest bathroom and converting the tub into a walkin shower. The photo is the original tub drain and ptrap that connects to a cast iron drain. I've never seen a trap like this. Can I used it with my new shower drain?

The cast iron is 2inch running to the stack so it's ok. Trying to avoid having to remove cast iron pipe since its in good shape.

 

[phishfood]

60 year old cast iron? Replace every bit of it you can.

 

[Matt30]

Going to a walk in shower from a tub, you want a 2" drain anyway, where that is likely 1 1/2", I can't tell from the picture.

 

[Matt30]

That also appears to be an old drum trap, not a p-trap

 

[frodo]

remove the drum trap and the 1 1/2 pipe. code has changed in the last 50 years

tub arm is to be 2'' and drum traps are illegal

 

[Matty]

So this is a photo of where that drain connects to the stack. How do I remove the cast iron drain pipe at the hub? I'm assuming it's better to remove rather than cut it.

If I cut the drain pipe about 2 feet from the stack is it likely that I can wiggle it loose? If not then how?

Thanks for advice.

 

[Mr_David]

cut it here.
Connect new pipe with a banded coupling.

 

[SHR]

cut it here.
Connect new pipe with a banded coupling.

Good call if OP was using the same size pipe. OP is not. Despite stating 2", the pipe pictured is 1 1/2". All existing steel pipe must be removed and new 2" installed. Big job for a DIYer.

 

[Matty]

Good call if OP was using the same size pipe. OP is not. Despite stating 2", the pipe pictured is 1 1/2". All existing steel pipe must be removed and new 2" installed. Big job for a DIYer.

Why do you think it's 1 1/2? That is 2 inch pipe where Mr David is recommending I cut. Yes it's 1 1/2 near the trap but it's 2 inch where he's recommending I cut and use the banded coupling. Please explain.

 

[SHR]

Yes, I was basing my statement on the picture of the pipe around the drum trap. If the outside diameter of the pipe is 2 3/8" you are golden. Mr. David's recommendation is the best way to make the connection. And much easier to do with no leaks!

 

[Matty]

Cool. Thanks for all advice.

 

[Mr_David]

I have never seen 1-1/2" cast iron with hub & spigot lead joints.
Only 2" and up.

All the 1-1\2" trap arms I have seen are usually Galvanized pipe screwed into tapped santees.

 

[Matty]

I have never seen 1-1/2" cast iron with hub & spigot lead joints.
Only 2" and up.

All the 1-1\2" trap arms I have seen are usually Galvanized pipe screwed into tapped santees.

Correct. The cast iron is 2". It's only 11/2 near the trap.

 

[frodo]

before you cut that pipe

add a hanger/strap with in 12'' of the cut. because when you cut it it will drop,

 

[KULTULZ]

before you cut that pipe

add a hanger/strap with in 12'' of the cut. because when you cut it it will drop,

Now that's good advice!

Don't ask how I know.

Note To Self-

Hard hats have a purpose...

 

[Matty]

before you cut that pipe

add a hanger/strap with in 12'' of the cut. because when you cut it it will drop,

Absolutely. Preparing for it to be heavy!

 

[Matty]

Success.

BTW, excellent call adding the extra strap. Six feet of 2" cast iron sure is heavy!