bathroom sink rough in

Startinover

I'm redoing the whole bathroom. From previous posts and your help I am using 1 and 1/2 copper drain. Will transition to 1 1/4 copper before going up into the bathroom for double sinks. (drain comes through the floor, not the wall)
Question. Where and how should I transition from the copper to the 'chrome plated'? pipes normally used for the trap etc?

as of now floor is down to the subfloor in bathroom and the ceiling is off downstairs so have full access.

Thank you

oh'mike

Why are you using copper drain lines?

They are very expensive and prone to corrosion---

PVC is superior in My opinion--Mike---

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joecaption

I agree 100%, cheaper faster, and is never going to corrode.

TarheelTerp

Who suggested that you use copper for drains?

I'm not the least bit shy about my preference for copper for water lines...
but I can't see any reason to use it for residential drain work.

Startinover

2 reasons for using copper.

1. the current drain is copper. i willl have to join it to the fitting where it goes into the soil pipe. if i go with pvc i would need some kind of transition
to copper anyway to why not stay with it. 6 of one, hlaf dozen other.

2. the big one. my drain line lays in a notch in the top of 6 joists as it goes from the spot where it comes down from the bathroom to the soil pipe. Also in the notch is the hot water feed laying directly on top of the drain. So after pulling up the floor board I can now get to these pipes.

To get to the drain really I need to cut the hot water feed, then remove the drain, then put in the new drain. Finally put back the 1/2" copper hot water feed, which would get soldered.
Since the two pipes are laying on each other I am not thrilled about soldering the 1/2 copper with it sitting on PVC. Thus the decision to have copper drain, so that when I solder the feed line back in I dont hose up the drain. Copper drain should be OK with this I think.

Startinover

location is north wales pennsylvania

oh'mike

Copper is an accepted product,so go ahead with your plans---

Protecting the PVC while soldering is usually a simple matter of isolating the line with a sheet of steel--I like large flat electric box covers---

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rjniles

If you are bring the drain up thru the floor and not in the wall- make sure you are not creating a non-compliant S trap.

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Javiles

The answer to your question, the 1 ½ rough copper is 1 ½ ID the chrome plated brass P trap is 1 ½ OD so it will slip inside the copper, you then just solder it in to place, that's the way it’s done, you’ll have to sand the chrome off at the point of solder. Use 50/50 solder. Use a good gauge trap. 17 gauge, will last a good long time.

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