OK for waste to run uphill a short distance?

[trf0412]

Currently in the middle of a bathroom refit. Just had first-fix plumbing done and new flooring installed and plumber has sent me some photos of the pipework before flooring went down (see attached).

The shower and sink waste combine into one before crossing the joists to get to the soil pipe. From the photo the plumber sent me, it looks like there must be a fall from the shower waste down to the sink waste (it's pieces of rigid pipework joined with a straight connector, so can't possibly be falling from both ends, right?). Also, I'm not sure why a T-piece that should be used vertically has been used horizontally? Anyway, my logical conclusion is that water will be permanently sat in the section of pipe between the T-piece and where it turns to go up to the sink. So, if I'm right, that leads to a few questions:

• Is this going to pose a major problem or will the waste coming from the sink just displace the water in the pipe as it would be coming from a higher source?
• Will this set-up result in the sink draining too slowly and backing up?
• Is there a risk the sink waste could get into the shower tray (esp. with the strange T-piece that's been used, meaning the water will need to do a sharp left-turn)?
• How about the water coming from the shower while showering? Will it all flow via the T-piece down to the soil pipe, or is there a chance it will push water back up the sink waste?

 

[ShaunCorbs]

Needs a fall on the basin pipe and that plumbing also isn't upto par

Yes
Yes
No
Yes

 

[trf0412]

Can you give me more details about why it isn't up to par? I'm aware that plumber has drilled holes through joists higher than they should be, but would be interested to know what else you've spotted.

 

[ShaunCorbs]

Notching and holes arnt really correctly done

Mix and match push fit fittings

Inserts in plastic pipe ?

Long left runs arnt clipped so possibility of a thud every time you close a tap if on mains pressure

 

[trf0412]

By the way, my questions 1 and 4 had two parts, so I don't know which part your "yes" answers relate to. Depending on which part of the question you were replying to, the answers are complete opposites of each other...

 

[trf0412]

Yes, the notching and holes are a bit of a mess... not really anything I can do about these now, apart from hope they don't cause an issue. The bits of reinforcing wood are only there because I insisted on having them, but I don't know exactly how much they will help things. (A lot of the notches are pre-existing ones, though, so not all done by our plumber).

The mix-and-match fittings are probably due to the fact that we had a new boiler installed recently and the plumbers on that job used Hep20 pipe and fittings. Our current plumber uses Speedfit and has just continued on from the exisiting pipes/fittings, so I'm not too worried about this.

Not sure what you mean by inserts in plastic pipe?

Hmm... thud when turning off tap doesn't sound ideal... we have high pressure mains...

 

[ShaunCorbs]

By the way, my questions 1 and 4 had two parts, so I don't know which part your "yes" answers relate to. Depending on which part of the question you were replying to, the answers are complete opposites of each other...

First part will cause problems later on if it's falling the wrong way (blocking etc)

 

[ShaunCorbs]

Yes, the notching and holes are a bit of a mess... not really anything I can do about these now, apart from hope they don't cause an issue. The bits of reinforcing wood are only there because I insisted on having them, but I don't know exactly how much they will help things. (A lot of the notches are pre-existing ones, though, so not all done by our plumber).

The mix-and-match fittings are probably due to the fact that we had a new boiler installed recently and the plumbers on that job used Hep20 pipe and fittings. Our current plumber uses Speedfit and has just continued on from the exisiting pipes/fittings, so I'm not too worried about this.

Not sure what you mean by inserts in plastic pipe?

Hmm... thud when turning off tap doesn't sound ideal... we have high pressure mains...

Ok

That's fair enough thought he did the lot

And plastic pipe require inserts internally to the pip

Pic in attachment

 

[1Steven]

I never connect basin with shower.

 

[oz-plumber]

I've seen it all now.

There is no way that the person who did the waste / drain pipe has any knowledge about plumbing.
There is no way that will work correctly and will cause you insurmountable problems in the future.

The way the junction is installed you cannot get fall from the shower or the basin.

Unbelievable!!!!!

 

[trf0412]

Ok

That's fair enough thought he did the lot

And plastic pipe require inserts internally to the pip

Pic in attachment

View attachment 30792

Not something I can see, obviously, but I guess he used these. If they are a key element of the join, then presumably there would be leaks without them, right?

 

[trf0412]

There is no way that will work correctly and will cause you insurmountable problems in the future.

The way the junction is installed you cannot get fall from the shower or the basin.

What makes you say we can't get a fall from the shower either? (I'm not saying you're wrong, I just have no plumbing experience/knowledge). Is it because half the water will travel down through the sink waste pipe and not all be diverted down the main waste? Would the water not fill up the pipe leading to the sink first and then, once it's full of water with nowhere to go, take the path of least resistence down to the soil pipe?

 

[Stigster]

Even six inches more waste pipe and an elbow would have improved that situation. Water flows downhill under gravity. Simple as that. Water will drain away from that system but it is going to block at the elbow from the basin because it's a low point/no fall. Soap, hair, oils will gather there.

 

[snowhead]

That waste junction wants cutting out now and redoing.

It would have cost 1 more 32mm Elbow and for the Tee to be in the correct orientation.
Whoever did that doesn't understand how water flows and wouldn't have been aware of these either;

POLYPIPE Solv 40 White Cross Tee .. WS38 | Priority Plumbing

 

[Best]

In short, - he isn't a plumber.
Amazed that the "plumber" actually took those photos of that work he did and sent them to you!
Bit like a burglar taking a selfie when stealing your property and then sending you the photo. 🙂
Usually work like that is photographed by the customer to have proof or make complaint to the installer. (Or some of us take photos for hall of shame plumbing work)
I wouldn't want the other work to be completed with same person.

 

[1Steven]

Now you have seen everything, fitted in a carehome.

 

[ShaunCorbs]

Now you have seen everything, fitted in a carehome.View attachment 30796

motorised up and down sink?

 

[1Steven]

No fitted in a sluice room.
Waste is just held in with silicone.

 

[oz-plumber]

What makes you say we can't get a fall from the shower either? (I'm not saying you're wrong, I just have no plumbing experience/knowledge). Is it because half the water will travel down through the sink waste pipe and not all be diverted down the main waste? Would the water not fill up the pipe leading to the sink first and then, once it's full of water with nowhere to go, take the path of least resistence down to the soil pipe?

You have about as much understanding about how plumbing drainage works as your so called plumber.

Fair enough, you probably don't need to know.

But all the advice you have been given regarding the work done you had better take on board, because you will be accessing the drain in the near future if you don't have it corrected at this stage.

Far cheaper to rectify now than after the bathroom has been completed.

Just out of interest, you must have had some thoughts on whether it has been done correctly otherwise you wouldn't be asking the questions on here.

 

[bambers]

B