How to Add a Second Sink to a Bath Vanity | This Old House
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. [https://bit.ly/2Hpga5Q]
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How to Add a Second Sink to a Bath Vanity | This Old House
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How many plumbers still use copper? With pex it's so much easier 🙂 just my opinion
Should have replaced that laminate counter top first before adding a second sink
Drainage understandable (but everybody does it differently) but…How he add connection for hot and cold water for 2 sinks? Not clear at all.
this looks so easy…who has 5min?!
#Ana Che I fell asleep and got to this video somehow and commented that lol @Brian Crandall
So… basically call a plumber
beautiful job
Did you add a second p-trap for the new sink? Thank you, great video
No stack or air admittance valve between the two p traps it appears. Wouldn't that result in gurgling or an air trap?
Yay
Something's not right here. Either the second sink isn't trapped, or it isn't vented…
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?
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.
mad skillz
This guy uses the shittiest products
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.
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
What about venting for these sinks???
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
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
So in our new world, Jennifer gets full credit for the sink install.
I lost it when he was welding – "yeah sure, I've got those exact materials and the experience to do this perfectly"
Too bad that bath is UGLY AF
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.
Shouldn’t Mark be fixing foundations?
I liked when Erica took the silicone caulk
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.
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…
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.
A little generous with that puddy…a?
I also sometimes get putty on my hot stem.
I wonder why they had that counter in the bathroom in the first place.
There's a much easier way to run the supply to the two sinks from the single supply. Just remove old valve and swap with a dual outlet valve. No pipe sweating necessary. Then use braided faucet connector, you can go up to 48". https://www.homedepot.com/p/SharkBite-1-2-in-Push-to-Connect-x-3-8-in-O-D-Compression-x-3-8-in-O-D-Compression-Dual-Stop-Quarter-Turn-Angle-Stop-Valve-25558LF/302360363
How did u add the 2nd plumbing?
Thanks for all of the great videos.
Such an ugly ugly bathroom just not worth it
This guy has no clue!
You can't have 2 traps tied together without a vent in between or be separately vented.
Who remembers the King of the Hill where Hank surprises Peggy with his and her sinks?
That pvc work is absolutely terrible lol
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
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.
Those old shut-off valves are the weak point of any plumbing system. Always upgrade if you can.
How did he know it identified as female?
i guess as a plumber you need alot of teflon tape right??
Plumbing just isn’t as intimidating when you have Richard walking you through jobs like this.
The best part is all the crucial details that are glossed over.
What are the odds that you don't have an issue with the drawers between the two sinks interfering with the drain line?
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.
My brother love his gift
thats not to code, that second sink is not being vented properly. this would fail inspection