How to Add a Second Sink to a Bath Vanity | This Old House
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- čas přidán 9. 09. 2024
- This Old House plumbing and heating expert Richard Trethewey shows how to install a new sink into an existing vanity. (See below for a shopping list and tools.)
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Richard helped a homeowner install a second sink in an existing bathroom vanity. To make room for the sink's new piping in the back of the cabinet, Richard had several of the cabinet's drawers shortened by a carpenter. Next, using a jigsaw and paper template, Richard cut a hole in the laminate countertop for the new sink. Afterward, he ran new a new PVC drain and copper supply pipes, mounted a faucet onto the new sink, set the sink in place, and made his final plumbing connections.
Shopping List for Adding a Second Sink to a Bath Vanity:
- lavatory sink
- teflon tape
- PVC pipe and assorted fittings
- PVC primer and cement
- copper pipe and assorted fittings
- lead-free solder and flux
- emery cloth
- copper bell hangers
- plumber's putty
- pipe-joint compound
- silicone tub-and-tile sealant
Tools for Adding a Second Sink to a Bath Vanity:
- drill/driver
- jigsaw
- hacksaw
- 1 3/4-inch-diameter hole saw
- propane torch
- tubing cutter
- adjustable wrench
- pliers
Both the sink and faucet were manufactured by Kohler Co. [bit.ly/2Hpga5Q]
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How to Add a Second Sink to a Bath Vanity | This Old House
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This guy seems so genuinely nice, I don’t even own a house nor am I going to for a while but I love watching this dude work
I’m an apprentice and these videos help me learn more
After watching this video, it takes me back to the time my Dad and I replaced all the copper piping in our 100 year old house to PVC... the satisfaction of finally getting a stronger water flow was so rewarding... I wanna convert all old homes now. 😂
I thought copper was good for you
opps not copper... my mistake, it was iron piping.
The best part is all the crucial details that are glossed over.
Commenting from the future. This bathroom already needs to be updated. 😂
It needed updating in 2014 also...
Looks fine?
I liked when Erica took the silicone caulk
My brother love his gift
Thanks for all of the great videos.
Should have replaced that laminate counter top first before adding a second sink
Exactly. 🙂
That was more of a description of what you did with the plumbing work there, rather then a lesson, for which we searched for this video. Please explain how did you extend one hot and one cold water supply into two?
You heard you were saying something like u put a T joint there. Where u were doing some kinda soldering.More explanation please...
A T joint is used to create two separate lines and it looks like just a T that is soldered onto each end. At that point you can extend those copper pipes wherever you want and add your shut off valves. Yes all these joints are being soldered for a secure connection.
I lost it when he was welding - "yeah sure, I've got those exact materials and the experience to do this perfectly"
David Thome you don’t have to weld if you don’t want or know how too. You can use sharkbite for connections and couplings. And you can use PEX also, which makes things a lot easier.
You only need to know how to solder or braze
Soldiering copper pipes isn’t difficult and the tools and supplies can be bought anywhere.
Is there a p-trap with the other sink? Video does not show it. If it does, will this setup cause siphoning issues?
The pros are pros
So... basically call a plumber
Angela Jordan especially if you dont have tools and experience
Its an easy job tho
@@Axxetto it's always easy till you fllod your house 😄
beautiful job
Drainage understandable (but everybody does it differently) but...How he add connection for hot and cold water for 2 sinks? Not clear at all.
Yes, if one is not familiar with plumbing it may seem complicated.
what he did is he un sweated both shut off valves cold & hot with 2 tees one one going straight and one going up in that way he supplied for both lavatories
Do they make a dual drain 1 1/4 kit for bathroom sinks.I cant find anything online.?
Who remembers the King of the Hill where Hank surprises Peggy with his and her sinks?
That’s why I’m looking this up right now, just watched that episode 😂
I wonder why they had that counter in the bathroom in the first place.
lol same here, looked pretty big for just one
I appreciate it thanks 🙏
Did he burn the wall when soldering the copper?
The original sink has a p-trap but the new sink has no p-track (that I can see) so the sewer gases will rise from the sewer to the new sink. I was thinking that the new sink would connect above the p-trap but it doesn't
I agree.
At 4:18, you can see him threading the trap together underneath the new sink.
If you have a single drain, you only need one trap. The singular trap will keep sewer gases from rising.
I also sometimes get putty on my hot stem.
I like that Richard used sch 40 pvc p traps not the poly p tubular traps.
Does it matter the directions of the pvc waste? I saw it looped around.
mad skillz
How did u add the 2nd plumbing?
What are the odds that you don't have an issue with the drawers between the two sinks interfering with the drain line?
Did you add a second p-trap for the new sink? Thank you, great video
Its not necessary but its better to add one
@@Axxetto Why isn't it necessary? the Tee was between the wall and the P trap for the left side sink so it would not have a P trap, or did I not see that correctly?
@@moonpiespotlight4759 because the 1st sink already has a trap. So adding another trap wouldn't matter since they are both connected to the same trap.
@@Axxetto The trap from the 1st sink was between the 1st sink drain and the Tee to the other sink. It was bypassed by adding the other PVC line to the other sink and the sewer gases now have a path to the room, so another trap would be required.
The camera work fails to show it clearly but it appears to me that he did install a trap for this new sink. If he didn't, that would have been a major mistake.
I thought code was that for every p trap it has to have a vent or convert the 1 1/2 vent to 2 inch
I think the whole house has a vent that goes through the roof.
Those old shut-off valves are the weak point of any plumbing system. Always upgrade if you can.
Plumbing just isn’t as intimidating when you have Richard walking you through jobs like this.
Plumbing isn't as intimidating when you're ok with doing it wrong.
@@Bapuji42 Well what’s the correct way to do it then?
I have the same situation where I need to add the second sink. My home was built in 2014 with two vanities but only one sink. I wanted to do it as in the video but was told it could cause at issue if I decide to sell. The pex can be accessed from the other side inside a closet - permit needed. Can I do as the video or do I have to get a plumber to make a T-connection to install separate shutoff valves?
When I bought my house I don’t the inspector looked with that much detail.
Most, but not all, places allow the homeowner to do his own work without a permit, but you need a permit if you hire someone. Minor things like a T-connection inside a bathroom would never be noticed by the city, they are more interested in larger projects.
Shouldn’t Mark be fixing foundations?
This was done incorrectly and against code. Not only does the drain pipe needs to be upgraded to 2” to act as a wet vent, but the vent for the second sink is below the trap weir which means it’s not vented.
a wet vent only need to be 2" if its venting a toilet, otherwise 2 lavs can be wet vented together on 1"1/2
This home would be grandfathered in anyways.
Yay
So in our new world, Jennifer gets full credit for the sink install.
No stack or air admittance valve between the two p traps it appears. Wouldn't that result in gurgling or an air trap?
Yes, the second lav needs an AAV to break the siphon and prevent the trap from siphoning. This is not how a plumber would do this. It would not pass any plumbing inspection.
terrylovepresents it seems it may also be necessary to throw an AAV on the left sink as well, thoughts? You can still have a siphon between the left p trap and the shared drain when the right sink is draining, no? Basically the same problem on both sides, you have three water seals; the two p traps and then shared drain line before you hit the stack vent in the wall. I also agree a good plumber would ideally like to put a p trap on either side of the stack in wall when possible.
Hi Guys, I'm about to do the same job myself. New double vanity is en-route... Any guidance on the proper slope of the drain pipe running right to left in this video? About the siphon effect, I could add a vent pipe for the sink on the right and join it to the existing one in my attic. But I'm not clear why this needed. In this example, the new sink eventually joins the common drain and vent pipe system. Why would it gurgle and would the p-trap from siphon? Just trying to understand... Thanks.
So how much would it cost me to hire a plumber cause am not trying to destroy my home 😂😂😂😂 serious question though
bariatasudan Lol I feel the same way.. did mess up the wall, the counter and pipes lol
this looks so easy...who has 5min?!
#Doug Funny 1:50 And once again Richard fails to twist his glue joints, making for weaker, less reliable connections. Nice work Richard. @Doug Reed
The woman is gorgeous
I believe if he had teed the second sink drain up stream of the trap so that both sinks use the same trap an additional vent would not be required.
Yes, it seems some if not many are done that way, especially in kitchens but I thought there was a code that requires each sink to have its own trap if they are more than a certain distance apart. I'm either not fully understanding that code or the two trap requirement may work against function though when it comes to venting and siphoning issues.
Do any other plumbers watching this guy hack in plumbing jobs totally wrong just want to scream? This is NOT the correct or legal way to do this job and I can't believe he constantly gets away with it.
How so?
Vegeta Is Better Than Goku
Not venting the new sink. I believe if it has its own trap it needs it’s own vent.
Yes, in most every home, multiple P traps eventually go into a single drain. What you can't have is one P trap in line with another (creating an air locked section), but two P traps that connect to a Y and enter the wall should be perfectly fine.
Yes you can! You can do anything you want if it's your home. .
@@jamedlock83 Absolutely! If it's your own home you're free to wreak havoc on all of your home's systems and make everything barely work.
A little generous with that puddy...a?
How did he know it identified as female?
lmao
This guy has no clue!
You can't have 2 traps tied together without a vent in between or be separately vented.
Not true! 👎
You can if they're less than a certain distance apart, I think.
your vent can be 5ft away from your trap, the problem is that the second lav he added is not being vented properly because your drain cant be above the vent like shown in this video
thats not to code, that second sink is not being vented properly. this would fail inspection
Wrong. . . States have different codes. That is up to code for that state
The drain connection is completely wrong and should not be done that way he could have just put a T before the p trap and that way both sinks would be draining through one p trap because he put 2 p traps, now the new sink has to be vented. You also cannot drop the level of the drain downstream of the p trap because it can cause siphoning.Thats not proper plumbing. That sink will be clogged in the future for sure
No, in most every home, multiple P traps eventually go into a single drain. What you can't have is one P trap in line with another (creating an air locked section), but two P traps that connect to a Y and enter the wall should be perfectly fine.
I swear to God this guy was never a plumber, he can fool everyone but not us plumbers. Second lav isn’t vented. Technically you could call it a combo, but still hack work.
what he did was an 's' trap', right?
Just Curious, what is that T that he is connecting at 1:47 on the Video?
Go ahead and try it.
Now, don't use it or touch it for 24 hours.
Why don't carpenters design a bathroom with a toilet closet. A sanitary room for your toilet so it doesn't contaminate the rest of the bathroom. Aka e coli
in larger master bathrooms, that have jacuzzi tubs they will sometimes have the toilet in a seperate little room. So when the wife has the candles and music on, you cant blow it out with no remorse
@@phillybear9466 lol
That pvc work is absolutely terrible lol
What about venting for these sinks???
its in the wall
How many plumbers still use copper? With pex it's so much easier :) just my opinion
yes, if you have the pex tool regardless you have to solder and adapter from copper to pex might have had being easier
Rats and pests chew pex, cause floods nothing beats copper
Something's not right here. Either the second sink isn't trapped, or it isn't vented...
If it goes down a drain that is vented through the roof that is still vented every drain in my house goes to the same vent and that is how it has been since 1910 that might be how they did it in the video
The new sink has a trap. Difficult to see in video but if you pause it you will see it. Nothing wrong with this job. Rich is a master plumber.
#Ana Che I fell asleep and got to this video somehow and commented that lol @Brian Crandall
For a Pro who does this for a living, and is showing people how to do this, that is the worst teflon tape job on the waste pipe. Teflon tape should be completely on the threads, not partially across the opening restricting the outgoing flow.
Such an ugly ugly bathroom just not worth it