Understanding Bathroom Fixture Pieces - Plumbing - DIY Home Improvement | DIYChatroom
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools
Display Modes
Old 04-02-2019, 03:37 PM   #1
Member
 
Join Date: Jul 2012
Location: Toronto, Canada
Posts: 130
Rewards Points: 222
Default

understanding bathroom fixture pieces


we are redoing a bathroom and I am a bit puzzled by the names and functions of the various bits and pieces that would make up a "shower set" or "kit" that we will use for the shower/tub combination (shower head, mixing unit, tub faucet and possibly a diverter.)

These sets are quite expensive (at least the better quality ones) and since we can reuse our old showerhead (which was quite new) and find a tub faucet somewhere, I am really just on the hunt for the temperature mixing / on-off unit.

what is a Rough In? is that the guts of the temp mix/on off unit?
and then is "trim" is the decorative exterior that affixes to the "rough in" to give it the look?
If so, then the roughin is standard (for a particular company - Moen, Grohe, etc.) and trims then come in different styles (chrome, brushed nickel, oiled bronze etc.)

are Rough in and Trim combinations unique for each company?
or is there any standardisation whereby I could use a Trim piece from one company with the RI from another company?

and then diverters. I usually hate the cheap pull up knob diverters on most tub faucets. I find they leak and don't hold the "diversion". but standalone diverters are crazy expensive.

do diverters work the same way? a standard Rough In for the diverter and then a trim covering?

thanks
pjstock is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-02-2019, 04:27 PM   #2
Hammered Thumb
 
Join Date: Dec 2018
Location: SuburbanIL
Posts: 1,587
Rewards Points: 938
Default

Re: understanding bathroom fixture pieces


"Rough" plumbing - is for the most part anything that must be installed prior to the wall being enclosed in. So the pipes and usually the mixing valve.

"Finish" plumbing - is what is installed at the end after walls, tiles, painting, trim, etc. is complete. So faucets, plates/covers, and usually shutoff valves.

Mixing valve - Usually these will come in a set. The mixing valve is designed to work with specific escutcheon plates and handles (mixing style) dependent on attachment and offset of the escutcheon. I imagine some may be universal per brand, but probably not across manufacturers. There are different ways to mix, like one pressure/temp control, or varying pressure/temp control. These will have different cartridge design and are specific to the handle type.

To reuse the faucet (spout/diverter) and showerhead, those could be swapped at any time, since they screw onto a universally sized pipe. However, they usually match the style and finish of the handle and escutcheon plate when purchased in a kit.

There are other styles of single-valve faucet diverters (than the pull-up knob) like a "turn nut" style. But usually people expect to see the pull-up knob.

Changing to a two-valve or three-valve diverter might entail more work than plug-n-play with a new mixing valve. Even the same style mixing valve may require changes to the hot/cold/shower pipe lengths.

Why are you replacing just the mixing valve?

Last edited by 3onthetree; 04-02-2019 at 04:31 PM.
3onthetree is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-03-2019, 10:36 AM   #3
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,744
Rewards Points: 2,150
Default

Re: understanding bathroom fixture pieces


Quote:
Originally Posted by 3onthetree View Post
Why are you replacing just the mixing valve?
Presumably to save money by not having to re-buy the parts he already has?
huesmann is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-03-2019, 05:09 PM   #4
Hammered Thumb
 
Join Date: Dec 2018
Location: SuburbanIL
Posts: 1,587
Rewards Points: 938
Default

Re: understanding bathroom fixture pieces


Quote:
Originally Posted by huesmann View Post
Presumably to save money by not having to re-buy the parts he already has?
He didn't say anything was wrong with it, if he likes it, just reuse it all. It could be more expensive to order a'la carte than in a big box store set.
3onthetree is offline   Reply With Quote
Old 04-03-2019, 05:19 PM   #5
Member
 
Join Date: Apr 2011
Location: North Carolina, USA
Posts: 5,123
Rewards Points: 6,486
Default

Re: understanding bathroom fixture pieces


Quote:
Originally Posted by pjstock View Post
do diverters work the same way? a standard Rough In for the diverter and then a trim covering?

A shower faucet has a mixing valve and then faucet handle and escutcheon plate. There is no such thing as a valve behind the tub spout. In this case the "rough in" plumbing is basically just a copper (usually) pipe sticking out of the wall. The spout connects directly to that. The diverter is built into the tub spout. It is not nearly as complicated as a shower valve. Basically all it does is block the water from coming out of the pipe, which sends the water up to the shower head. You could accomplish the same thing by merely holding your hand over the tub spout while it's running, and water would start coming out the shower head. Very low tech.


Mostly this stuff is distinguished as a "trim kit". You will notice that all of these say in parentheses "Valve not included". And yes, some of these are silly expensive Here are some Moen examples.



https://www.homedepot.com/b/Plumbing...5yc1vZcgf1Z3zb


You would have to contact the company of your shower faucet to ask them what trim kits you can use for a given valve. For example a common Moen valve is their Posi-Temp, so many of the shower kits shown there can be used with this valve, or to put it another way if you have that valve you can use any of the trim kits that fit it. It's not the shape of the valve per se, it's how the handle connects to it.



https://www.homedepot.com/p/MOEN-Bra...2510/100068474


Shower heads are basically universal - they simply screw on to the shower pipe sticking out of the wall.

Last edited by jeffnc; 04-03-2019 at 05:21 PM.
jeffnc is offline   Reply With Quote
Old 04-04-2019, 11:31 AM   #6
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,744
Rewards Points: 2,150
Default

Re: understanding bathroom fixture pieces


Quote:
Originally Posted by 3onthetree View Post
He didn't say anything was wrong with it, if he likes it, just reuse it all. It could be more expensive to order a'la carte than in a big box store set.
Sure, but if he has 3 of 4 pieces he needs and the missing piece costs $30 vs $50 for the set of 4? I mean, sure there's an argument to be made if the pieces match vs. a solo purchase that doesn't look right.
huesmann is offline   Reply With Quote
Old 04-04-2019, 11:45 AM   #7
Hammered Thumb
 
Join Date: Dec 2018
Location: SuburbanIL
Posts: 1,587
Rewards Points: 938
Default

Re: understanding bathroom fixture pieces


He also didn't say whether the wall board was down or if he has an access panel to the mixer. That's is why it was asked.
3onthetree is offline   Reply With Quote
Old 04-07-2019, 09:24 AM   #8
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,744
Rewards Points: 2,150
Default

Re: understanding bathroom fixture pieces


A thousand apologies.
huesmann is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Foyer fixture just smoked LED bulb - why? 5mall5nail5 Electrical 5 01-29-2018 06:22 PM
NEC - what is the purpose of some of these codes ? chez bouton Electrical 32 12-17-2013 03:04 PM
2 sets of wires to bathroom light fixture Mrsbrad Electrical 4 04-24-2013 04:37 PM
New bathroom fixture won't fit! fixitnana Plumbing 3 05-07-2008 11:26 PM
New bathroom fixture Palmtree Carol Electrical 6 04-26-2008 11:28 AM




Top of Page | View New Posts