Hub trap in ceiling for freestanding tub

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FLN

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Hello, I'm installing a stone resin (heavy!) freestanding tub and to simplify things, would like to just drop the 1-1/2" x 8" brass tailpiece into a hub trap glued into a (glued) trap assembly. Something is making me pause on this, as the ceiling will be sheetrocked and this install will be inaccessible. Also don't know if this is kosher for a tub drain, or is this type of hub trap connector primarily for sink drains?

The alternative is to use an ABS glued and mounted floor drain (see image) and glue the whole assembly together. The problem will be that the tub is nearly 300 lbs. and it will be easier to (physically) line up the tub over the larger hole and into the hub trap (there is some freedom of movement of the glued trap assembly side to side, so we can have someone under the ceiling lining things up while others above are moving side to side) rather than lowering the beast into the (fixed) floor drain rubber seal/assembly and risk torquing the tailpiece.

I would prefer plan A, as we can use the tub for a bit and see if there are any leaks before sheetrocking the ceiling underneath/just not sure about code compliance since the hub trap adapter will be inaccessible. I really don't need the flush mount fancy drain! This thing isn't going anywhere any time soon.

Thanks.


hub-trap-a.jpg
hub-trap-b.jpg
 
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Breplum

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a code alternative is to use a plastic x tubular shielded no hub coupling adapter. That way you have a positive, water tight joint that is far more secure than a simple slip-joint connector.
 

FLN

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a code alternative is to use a plastic x tubular shielded no hub coupling adapter. That way you have a positive, water tight joint that is far more secure than a simple slip-joint connector.
Thanks. It appears there is a 1-1/2 to 1-1/4 no hub coupler I could install, assuming the brass tailpiece is 1-1/4:

proflex.jpg
 

Reach4

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assuming the brass tailpiece is 1-1/4:
Do not assume that.

A slip joint 1-1/2 tube is 1.50 OD. A plastic schedule 40 1-1/4 inch pipe is 1.660 OD. So I think the smaller end of of the coupling that you picture is meant to go around 1.660 OD.

Instead look for a Fernco 3002-150 1.5" Cast Iron, Plastic or Steel to 1.5" Tubular , which is equiv to Mission T-150. In PlumQwik P3002-150. I am not a pro.
d6ab1bea-1e25-4900-87b1-298e8860833d
black-rubber-fittings-p3002-150-64_100.jpg
 
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FLN

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Do not assume that.

A slip joint 1-1/2 tube is 1.50 OD. A plastic schedule 40 1-1/4 inch pipe is 1.660 OD. So I think the smaller end of of the coupling that you picture is meant to go around 1.660 OD.

Instead look for a Fernco 3002-150 1.5" Cast Iron, Plastic or Steel to 1.5" Tubular , which is equiv to Mission T-150. In PlumQwik P3002-150. I am not a pro.
d6ab1bea-1e25-4900-87b1-298e8860833d
black-rubber-fittings-p3002-150-64_100.jpg

Alas, I have confirmed that
Do not assume that.

A slip joint 1-1/2 tube is 1.50 OD. A plastic schedule 40 1-1/4 inch pipe is 1.660 OD. So I think the smaller end of of the coupling that you picture is meant to go around 1.660 OD.

Instead look for a Fernco 3002-150 1.5" Cast Iron, Plastic or Steel to 1.5" Tubular , which is equiv to Mission T-150. In PlumQwik P3002-150. I am not a pro.
d6ab1bea-1e25-4900-87b1-298e8860833d
black-rubber-fittings-p3002-150-64_100.jpg
Alas, I have confirmed the 3001-150 (reduced) opening is too big for the brass tailpiece. Need to investigate the P3002-150.
 

FLN

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Update - P3002-150 is the correct part. Fits perfectly! Thanks @Reach4 for the tip.

Here's a dry fit image:
plan-c.jpg
 
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