Where to find 1.5" shower drain assembly?

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Old 11-01-19, 05:43 PM
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Where to find 1.5" shower drain assembly?

Where can I find a new 1.5" fitting for an existing shower drain? This one from Kohler pops up in searches, but I'm not 100% sure it's what I need because it also mentions 2" and 3", which obviously won't fit. If that one isn't what I need, I'm not picky about shape, just whatever works without tearing up the concrete.
 
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Old 11-02-19, 04:24 AM
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1 1/2" hasn't been allowed for shower drains for 20+ years. Shower drains are 2" minimum size by most codes in the US. To find a 1 1/2" you might have to look at old stock, antique or salvaged parts. You can also search outside the US but now most foreign parts are metric so be absolutely sure it's English dimension before buying.
 
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Old 11-02-19, 05:23 AM
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The 2" drain requirement for showers is another one of those code changes that makes me scratch my head and ask why.

Do you have enough room for a 2" to 1 1/2" adapter? Just be aware that it won't be to code.
 
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Old 11-02-19, 07:51 AM
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As cwbuff mentioned - a 2" - 1.5" adapter is what you'll need. You can get a donut-type adapter that gets cemented into the 2" pipe, so it doesn't really take up any extra space.

(Though 2" is required by most codes as pointed out)
 
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Old 11-02-19, 11:05 AM
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Pilot Dane,

That makes sense, since this house is 50+ years old. Believe it or not, we didn't tear up the old one when we took the pan out, is there a way to salvage them? It's still attached (with a bit of mortar stuck to it), it's just WAY too high for the new pan. And I need a new grate, the old one didn't stay in place, and had to be chased around the shower. Still have it too though if absolutely necessary.

cwbuff,

Not sure. The old one is still on there and it sticks up quite a bit farther than what the new one should (we're building the new pan ourselves, using the Goof Proof system+schluter membranes unless something easier comes along in future research.)

Zorfdt,

Thanks, I'll look into these donuts a bit more. Yes, I'm aware of the code, but leaving concrete and old (likely) asbestos flooring alone seems like the smarter option.
 
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Old 11-03-19, 05:16 AM
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FYI, I couldn't recall the name of the adapter I was thinking about... It's a bushing.

https://www.homedepot.com/p/DURA-2-i...-251/100344381
 
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Old 11-03-19, 08:04 AM
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" . . . .unless something easier comes along in future research.)"

Google "Tile Redi shower pans". Very easy to install and reliable. Also kinda' pricey.
 
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Old 11-04-19, 06:07 AM
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Cwbuff,

I looked at tile-redi, but I didn't see a custom floor drain option (and if they have one, it's probably not any cheaper than the Onyx we decided was too expensive). Our drain isn't centered, if it was, I'd put an acrylic insert in and say screw it to the tile. :-P
 
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Old 11-04-19, 06:48 AM
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Is moving the drain an option? Probably a PITA in concrete (I've never done it) but doable.

BTW - Like your screen name. My daughter is a big time DIYer (last week she replaced the pump on her DW). She works full time and has three boys (two kids and a husband) to look after and still does all of the home maintenance and repairs.
 
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Old 11-04-19, 10:13 AM
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FYI, I couldn't recall the name of the adapter I was thinking about... It's a bushing.

https://www.homedepot.com/p/DURA-2-i...-251/100344381


Maybe it's just me, but all I can get from this link is the Home Depot home page. I noticed the same thing on another thread a few days ago too.
 
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Old 11-04-19, 04:56 PM
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Cwbuff,

Thanks! I was taught how to be a little bit of everything because I grew up on a farm and my dad really wanted a son, but was "cursed" with two daughters instead. :-P It was awesome to spend that time with him, and it's been useful, so no regrets.

Anyway, I'm not sure that moving the drain is worth it. We are going to have an actual plumber friend look at it to see if he has some suggestions.

Casual Joe,

Check your settings on your ad blockers and such. If you have the add-on that cleans up links that might be stopping you from getting there too. I can't remember the name of it and I haven't had it in years, but in firefox it was a little icon that looked like a broom.
 

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Old 11-05-19, 10:52 AM
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Casual Joe,

Check your settings on your ad blockers and such. If you have the add-on that cleans up links that might be stopping you from getting there too. I can't remember the name of it and I haven't had it in years, but in firefox it was a little icon that looked like a broom.

Found the problem and fixed it and you were right, it was a pop-up blocker that came I assume with the last Chrome update. Regardless, it's fixed now.

Dayyummmm, past my lunch time!
 
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Old 02-04-20, 03:20 PM
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Question Maybe I should have bought a lotto ticket?

So we chipped out the concrete around the drain thinking we were just going to have to make do, and lo and behold, there was a rubber fitting a bit farther back and it actually IS a 2" drain line right after the p-trap! So, while extremely weird, we're pretty happy that all we needed to do was dig out a lot of sand and buy a new 2" rubber fitting and attach new 2" pipe to the old 2" pipe. Was this a common practice? Or did we just get VERY lucky? And since we did that, we went ahead and centered the drain, it was only a tiny bit more concrete and someone will be very happy we did when they go to remodel this bathroom again.
 
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Old 02-05-20, 05:40 AM
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I would go to the supplier and measure what is available. Sometimes descriptions online are not accurate.
 
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Old 02-05-20, 10:22 AM
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Thanks for following up! Always good to hear when things work out well - or even better than expected!
 
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Old 02-05-20, 05:38 PM
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1 1/2" hasn't been allowed for shower drains for 20+ years. Shower drains are 2" minimum size by most codes in the US.
But why is this? I have run into this same thing in the past and it makes no sense to me since bathtub drains are typically 1 1/2" and carry a lot more flow than a simple shower drain. I have always dumped a tub drain into a 2"trap and drain line, but shower drains just don't carry that much flow.
 
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Old 03-17-20, 01:46 AM
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I think it because a shower has a much lower flood-level than a tub.
 
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Old 03-17-20, 10:37 AM
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I've heard the same reasoning as Steve. A slow-draining tub won't flood. A slow-draining shower can and will.
(I actually had a tenant a few weeks ago that overflowed the shower pan. Still don't quite understand how... but there was a squirrel-sized mess of hair and soap that got pulled out. ick!)

Similar reasoning for a 2" standpipe for a washer, but if the same washer drains into the laundry tub, a 1.5" drain is sufficient since it can hold the water while it drains.
 
  #19  
Old 03-25-20, 06:15 AM
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Some states have updated their plumbing/building codes recently and 11/2" shower drains are now acceptable.
 
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Old 03-25-20, 04:15 PM
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Thank you, minimac, that's good information to know.
 
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