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Started By
Message
Calling plumbers of TD
Posted on 3/14/24 at 1:02 pm
Posted on 3/14/24 at 1:02 pm
Looking to convert a single sink vanity to a double sink. Is it ok to install a T fitting at the hot and cold lines and use those for my second sink? Or do I have to run a new set of hot and cold water lines for the 2nd sink? Also same question for the drain line. Does he sink need its own drain line or can I tie them both into the same drain line?
This post was edited on 3/14/24 at 1:06 pm
7
Posted on 3/14/24 at 1:06 pm to Redstickbaw
Should be able to T off without issue.
Posted on 3/14/24 at 1:22 pm to Redstickbaw
Install Double Bowl Sink Vanity w/ Only One Wall Water Pipe Connection & Drain Pipe Using PVC
I guess the only thing you would have to worry about is draining both at the same time IF they are being used at the same time.
I guess the only thing you would have to worry about is draining both at the same time IF they are being used at the same time.
Posted on 3/14/24 at 2:16 pm to Redstickbaw
I'm not sure about plumbing code, but a T fitting for dishwasher and ice machine is extremely common for supply lines.
Most double kitchen sinks have a T for the drain line.
DON"T use that flexible pipe crap.
ETA: I'm talking about this. Downvote away, but no real plumber would ever use this and if you pay someone to do a job that uses this you should fire them. There's better methods that are firm smooth pipe. But most importantly the corrugated pipe will trap debris and cause you to get blockages. Blockages happen with smooth pipe, throw in debris traps and what do you think will happen?
Most double kitchen sinks have a T for the drain line.
DON"T use that flexible pipe crap.
ETA: I'm talking about this. Downvote away, but no real plumber would ever use this and if you pay someone to do a job that uses this you should fire them. There's better methods that are firm smooth pipe. But most importantly the corrugated pipe will trap debris and cause you to get blockages. Blockages happen with smooth pipe, throw in debris traps and what do you think will happen?
This post was edited on 3/15/24 at 10:07 am
Posted on 3/14/24 at 2:50 pm to baldona
quote:
DON"T use that flexible pipe crap.
Why not? I’m not a plumber but I’ve heard nothing but great things about PEX.
Posted on 3/14/24 at 3:12 pm to baldona
quote:
DON"T use that flexible pipe crap.
Why? I have it in my kitchen sink and it works fine.
Posted on 3/15/24 at 5:34 am to Redstickbaw
You can absolutely turn a single vanity into a double. There are multiple options with the water lines. Is copper stubbed out of your wall? Pex? If copper is present-you can remove the individual shutoffs and install a dual outlet 3/8x1/2 compression shut off valve; or you can sweat a tee on the bull of the fitting and install individual lines and shutoffs to each vanity. If there is pex-do as described above and install tee.
The drain is simple-remove old trap adapter and install a wye fitting. Run individual drain lines to each one with the proper pitch.
The drain is simple-remove old trap adapter and install a wye fitting. Run individual drain lines to each one with the proper pitch.
Posted on 3/15/24 at 7:02 am to baldona
quote:
DON"T use that flexible pipe crap.
Be more specific, there are a lot of flexible pipe options and most are not crap.
Posted on 3/15/24 at 7:53 am to TDsngumbo
He's talking about the accordion style flex drain pipe.
Posted on 3/15/24 at 8:12 am to HarryCallahan
quote:
You can absolutely turn a single vanity into a double. There are multiple options with the water lines. Is copper stubbed out of your wall? Pex? If copper is present-you can remove the individual shutoffs and install a dual outlet 3/8x1/2 compression shut off valve; or you can sweat a tee on the bull of the fitting and install individual lines and shutoffs to each vanity. If there is pex-do as described above and install tee.
The drain is simple-remove old trap adapter and install a wye fitting. Run individual drain lines to each one with the proper pitch.
They also make an "add-a-tee" fitting that you can screw on to the outlet of an existing angle stop and it has 2 ports to run water flex lines. You just have to find long enough flex lines and you wont be able to isolate just one sink if you have to shut them off.
ADD-A-TEE
Posted on 3/15/24 at 9:17 am to Themicah86
^^^ Correct. The tee is 3/8 compression, the faucet will be 1/2 Female iron pipe. Additionally, you can buy a couple of 3/8 comp x 3/8 comp lavatory flexs and daisy cahin them with a 3/8 compression union: Union Just take the brass nuts and ferrules off and screw the flexs onto the union to use it as a coupling (most hoses are 20" so if you have a further span, the union/coupling and an additional 3/8 x 3/8 flex is the fastest and cheapest option.
Posted on 3/15/24 at 9:38 am to mdomingue
This is what I got from Home Depot:
Snappy Trap Universal 1-1/2 in. or 1-1/4 in. D PVC Single Sink Drain Kit
I use this in actually my kitchen sink and half bathroom vanity sink. It especially helps in the bathroom where I have small room to work with.
Snappy Trap Universal 1-1/2 in. or 1-1/4 in. D PVC Single Sink Drain Kit
I use this in actually my kitchen sink and half bathroom vanity sink. It especially helps in the bathroom where I have small room to work with.
Posted on 3/15/24 at 10:05 am to BilbeauTBaggins
Use that stuff if you want, all the hardware stores sell it. But any good plumber would never use it and I can't imagine it is to code anywhere.
I've seen multiple home inspections flag this as something to replace immediately.
Its just a jerry rigged method when there are better methods that really aren't much harder.
ETA: I'm not a plumber or someone set in their ways. I'm simply trying to help out do it the right or a good way.
I've seen multiple home inspections flag this as something to replace immediately.
Its just a jerry rigged method when there are better methods that really aren't much harder.
ETA: I'm not a plumber or someone set in their ways. I'm simply trying to help out do it the right or a good way.
This post was edited on 3/15/24 at 10:06 am
Posted on 3/15/24 at 10:13 am to Redstickbaw
My double vanity in the master is set up just like this. Hot and cold lines with a T fitting to supply the first sink. Both 2 inch drain lines go into the wall and connect at a Y near the floor level before going down to connect to the larger 4 inch line, that the toilet and shower also feed into.
Posted on 3/15/24 at 10:16 am to baldona
quote:
But any good plumber would never use it and I can't imagine it is to code anywhere.
Why?
quote:I don't believe you.
I've seen multiple home inspections flag this as something to replace immediately.
Posted on 3/15/24 at 11:26 am to BilbeauTBaggins
quote:
I've seen multiple home inspections flag this as something to replace immediately.
I don't believe you.
I believe it. Home inspectors usually aren't worth a bucket of warm spit and are on the hunt to fill out a report with the least amount of work and knowledge possible. cracked outlet covers and suspect p-traps are their bread and butter.
I wouldn't install one of the flex drain lines in my own home because they look leak and stoppage prone. But they probably will work for several years and could save a homeowner a $100 in a plumber. Just as long as you're vigilant about checking for leaks then I don't care how the dirty water ends up in the sewer.
Battery powered water alarms are readily available and cheap. I recommend them under any sink. The difference in one day of dripping vs 2 weeks of dripping can be huge.
Posted on 3/15/24 at 11:29 am to BilbeauTBaggins
quote:
I've seen multiple home inspections flag this as something to replace immediately.
I don't believe you.
Why would I make that up? Like I said I'm not a plumber, I don't know the code. I'm just trying to help you out. Doing it right is just a little bit harder for a lot better end product.
Link to a home inspector on flex pipe and code
"Flexible pipes are not code compliant because they collect dirt and grime that's supposed to flow down the drain. The zigzag sides make it easy for water slow-down, which results in more gunk collecting further along toward your home’s plumbing system. Code requires smooth drain surfaces so that water flows without restriction."
Posted on 3/15/24 at 1:15 pm to baldona
quote:
Doing it right is just a little bit harder for a lot better end product.
It's doing it different, not "right." Every city/county/state has different codes for plumbing. Maybe in most cases it isn't totally up to code but it still works. I've had it for two years. No issues. If I need to end up buying standard PVC then fine, I'll worry about it then.
I don't see why stores would sell the stuff if it automatically fails as part of any home inspection. There's no incentive to sell the stuff if that's the case.
Posted on 3/15/24 at 7:23 pm to Redstickbaw
You can T off. It will have the same pressure as if you ran another line for the other sink. If both sinks are in use at the same time your pressure will drop somewhat
Posted on 3/15/24 at 7:29 pm to Redstickbaw
The drain is no different than everyone's double sinks in their kitchens
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