Plumber Recommendations please!

[therock]

On 11/4/2023 at 6:05 PM, Volvobrick said:

Maybe there is a silicon gasket and white tape won't help. 

As in - add a gasket inside? 

[Kb27]

On 11/4/2023 at 5:31 PM, therock said:

Bros, this sink keeping having a very gentle leak that befuddles my plumber..

It seems to be leaking from this part, they add tape, remove tape but it's still leaking..

Any ideas? Thanks

 

there is usually a gasket there. it's flat, when you screw it down, the gasket keeps it waterproof.

if it's broken or sealing properly, then it leaks.

ptfe tape doesn't help much in that situation. many people don't know ptfe tape is a lubricant, the actual sealing is by the gasket.

but strange that your plumber doesn't know.

[Kb27]

On 11/4/2023 at 6:35 PM, therock said:

As in - add a gasket inside? 

A new plastic one cost only a few bucks. They all come with sealing gaskets.

The black rings are the gaskets:

Edited November 4, 2023 by Kb27

[Lala81]

On 11/4/2023 at 6:06 PM, Volvobrick said:

What sink needs to wait for 6 months???

Its a countertop sink. She wants back the same dimensions. 

[therock]

On 11/4/2023 at 6:44 PM, Kb27 said:

there is usually a gasket there. it's flat, when you screw it down, the gasket keeps it waterproof.

if it's broken or sealing properly, then it leaks.

ptfe tape doesn't help much in that situation. many people don't know ptfe tape is a lubricant, the actual sealing is by the gasket.

but strange that your plumber doesn't know.

Thanks strange 

that part is brand new hmm 

can you use a plastic cup with the metal top? 

Edited November 4, 2023 by therock

[Dafansu]

On 11/4/2023 at 5:31 PM, therock said:

Bros, this sink keeping having a very gentle leak that befuddles my plumber..

It seems to be leaking from this part, they add tape, remove tape but it's still leaking..

Any ideas? Thanks

 

just change to plastic one, the material you currently using not easy to fix leak. 

[Kb27]

On 11/4/2023 at 7:13 PM, therock said:

Thanks strange 

that part is brand new hmm 

can you use a plastic cup with the metal top? 

The screw-on "cap" simply tightened the 2 parts together, onto the gasket, forcing a waterproof joint. As I mentioned, you don't need ptfe tape, but just the gasket.

For brand new, sometimes have manufacturing defect. If you can find a correct size gasket, you can replace it. Otherwise, it's easier to buy a new bottle trap at the shop or online.

[Mkl22]

On 11/4/2023 at 6:44 PM, Kb27 said:

there is usually a gasket there. it's flat, when you screw it down, the gasket keeps it waterproof.

if it's broken or sealing properly, then it leaks.

ptfe tape doesn't help much in that situation. many people don't know ptfe tape is a lubricant, the actual sealing is by the gasket.

but strange that your plumber doesn't know.

Plumber doesn’t know means plumber fail big time. Next plumber please. 
 

probably need to remove and realign the gasket seal. But ptfe tape is a seal. Just that when used with a rubber seal it causes more harm than it solves and the surface will then not be flat to press against the rubber gasket. With only metal it does seal well

[Kb27]

On 11/4/2023 at 8:06 PM, Mkl22 said:

Plumber doesn’t know means plumber fail big time. Next plumber please. 
 

probably need to remove and realign the gasket seal. But ptfe tape is a seal. Just that when used with a rubber seal it causes more harm than it solves and the surface will then not be flat to press against the rubber gasket. With only metal it does seal well

I have tried with ptfe tape on a flat non-tapered thread, Without a gasket, it will leak, no matter how hard you tried to tighten it.

ptfe tape is primarily a lubricant. If used with tapered thread, it will form a seal.

but most people will look at the white tape and say "hey, that's a seal, that's why it don't leak"

 

https://en.wikipedia.org/wiki/Thread_seal_tape

"Thread seal tape is appropriate for use on tapered threads, where the sealing force is a wedge action. Parallel threads may not seal effectively with or without tape, as they are intended to be sealed by a gasket."

Edited November 4, 2023 by Kb27

[therock]

On 11/4/2023 at 7:33 PM, Kb27 said:

The screw-on "cap" simply tightened the 2 parts together, onto the gasket, forcing a waterproof joint. As I mentioned, you don't need ptfe tape, but just the gasket.

For brand new, sometimes have manufacturing defect. If you can find a correct size gasket, you can replace it. Otherwise, it's easier to buy a new bottle trap at the shop or online.

So I can tell my family to stop using that sink, unscrew it and bring it to a hardware store tomorrow?
I'll try tomorrow at Clementi, there's a nice one near Ave 2, near the Halal Chicken Rice..

[Kb27]

On 11/4/2023 at 8:41 PM, therock said:

So I can tell my family to stop using that sink, unscrew it and bring it to a hardware store tomorrow?
I'll try tomorrow at Clementi, there's a nice one near Ave 2, near the Halal Chicken Rice..

Take note, the bottle trap has 2 sizes. If it's used with the wash basin, it's the smaller one.

The kitchen sink usually use the bigger one.

[Mkl22]

If you tighten this tapered seal without the thread seal it will still leak. So it does seal the threads and does seal. 
it’s like those garden taps that you screw into the wall. Need to put lots of tape. 

Edited November 4, 2023 by Mkl22

[therock]

Had a closer look, even the part leading down from the bathroom sink is wet so I’m not so sure it’s just that joint 😅 

I think I best leave it to the pros

and it’s not so easy in this model to unscrew the bottom out .. sigh 

[Kb27]

On 11/5/2023 at 8:10 AM, therock said:

Had a closer look, even the part leading down from the bathroom sink is wet so I’m not so sure it’s just that joint 😅 

I think I best leave it to the pros

and it’s not so easy in this model to unscrew the bottom out .. sigh 

So it's the higher up that is leaking.

There's also a gasket there. 😁

[Lala81]

Quite surprised a plumber can't sort it out. But probably the leaking amount is minor that's why they can't see it when they test? 

 

[therock]

It looks dry when they left .. it’s a rather slow drip but eventually it’s wet 😢 

[Ct3833]

@therock check this area, the leak can come from 1 and 2 too when the large hex ring is not tight enough, this is especially so when the drain hole on porcelain  sink is not in perfect round shape or the rubber under the trap is worn, see orange ring in next picture. There are usually 2 rubber seals, 1 on top of sink part and 1 under, where the hex ring is. Did you change anything recently ? 

Since the leak is not obvious, it will be difficult to detect it visuallly, try to wrap a small dry tissue on the blue area and see if it gets wet to isolate the top part . 

By the way did you clear the reservior below ? If the reservior is chocked, water flow will be slow, and next is water level will build up and cause leak at the upper joins. Otherwise the top parts  will hardly leak because these are low pressure stuff. 

 

 

 

 

 

There are two rubber seals, one on top andnone below. 

 

 

 

Edited November 5, 2023 by Ct3833

[Ct3833]

@therock 

There are rubber seal here, check if you have installed the rubber seal with correct orientation .