Drain in wrong place. Can this be fixed somehow ?

[Spinny]

Hi, my departed builders installed a rainwater drain somewhat in the wrong place.

It was supposed to be directly underneath the drain pipe position but has been put under the window instead. Is this going to be feasible to fix and how ?

See photo's...

[Mr Punter]

Yes, dig it out and reroute it.  If it is feeding into that y branch it will be shallow.

[Russell griffiths]

What he said ⬆️

[nod]

Real easy fix Id to move two 

A dodgy self builder put them on the wrong side of the corner 😁

[saveasteading]

  On 19/03/2025 at 16:44, Mr Punter said:

If it is feeding into that y branch

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IF. It's best to know. Put some water down and see if it comes through.

[Spinny]

Thanks for replies.

I have put some water down and it is indeed feeding into the y branch.

 

Looking at the current position, I am thinking the builders must have put it where it is for a reason - usually convenience and speed for them. It looks as though there is a pipe connected to the inspection chamber outlet with presumably a 90deg bend and then the gully on the end of that. So that is presumably why they deviated from the plan and it has ended up where it is. So any idea what parts would allow it to be connected in the correct position - can the gully be twisted relative to the grill on the top ?

 

I attach more photos. Any idea what part/manufacturer the gully is, it seems to have something with a cap on it inside - maybe a rodding point ?

 

[Eric]

That is a grease trap / gully, meant for kitchen / utility.

 

Just a rain head & elbow is all you need.

[Spinny]

Thanks Eric, I think I have found it - looks to be an OsmaDrain bottle gully as shown below.

 

I do need something with a water trap to stop smells because this particular rainwater pipe connects into the foul water drain to the sewer. It also rotates which is helpful.

 

I am not sure what the purpose of the fixed internal baffle is ?

It is roddable which is also useful but not really essential here as it could be rodded from the nearby chamber.

 

All in all I guess I might as well reuse it, it is just going to be a case of sorting out how to pipe it into the fixed chamber.

 

Am I right in thinking this is all going to be push fit ?

Am I supposed to have some sort of support under the bottom of the gully ?

 

 

[Spinny]

Another thought - should I be concerned with leaves and debris washed down from the roof blocking this up ? (the water in it looks rather black and putrid).

[Mr Punter]

That is a bottle gulley and has a water trap to stop smells escaping.  The grid will stop most leaves.  You can fit an interceptor on the downpipe to catch leaves if they become a problem.  You would normally be the gulley onto concrete for support.

[Russell griffiths]

That bottle gulley you have listed is the same as what you have, why are you getting another one. 

[Eric]

Might be better with something like this then 

[Nickfromwales]

  On 21/03/2025 at 11:47, Spinny said:

 

I am not sure what the purpose of the fixed internal baffle is ?

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It’s to create a throat so a body of water is trapped and prevents gasses escaping. 

[Spinny]

  On 21/03/2025 at 18:47, Russell griffiths said:

That bottle gulley you have listed is the same as what you have, why are you getting another one. 

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I'm not getting another one. I have just identified what it is that is there already.

[BotusBuild]

Spinny,

The pipes will most likely all be push fit. It might be a fight to get them apart, depending on how your builders fixed them in the ground (hopefully they didn't set in concrete). If you do get them apart check the rubber seals are not damaged before trying to re-use them - if they are, then easier to replace the whole fitting fo peace of mind.

 

You will likely need to do some pipe cutting to be able to move the trap/gulley closer to the Y-branch. Lots of measuring and checking and imagery in your head as to how it will all fit back together. Take you time with the refitting and it will all slot into place. Don't beat yourself up if you end up having to recut pipes a couple of times

[Spinny]

Thanks.

The pipes are not set in concrete, just shingle and hardcore over.

 

Am I right to think the rubber seals are attached to the pipe and NOT to the chamber inlets ?

(There is no way I want to risk replacing the chamber itself as it connects backward to the main kitchen drain and forwards to the main drain.)

[Spinny]

Just found this photo.

So the rubber seals are part of the chamber. uh-oh.

There is no way I want to have to change the chamber given it is connected elsewhere. Changing the chamber would mean taking a whole load of other stuff up too.

 

How likely is it to damage the seal when removing the pipe ?

[gaz_moose]

should just pull out. might need a bit of a wiggle.

use some washing up liquid as lube when putting it all back together.

[Gone West]

I wouldn't use washing up liquid or Vaseline on rubber seals, as over time the seal will be degraded. Use silicone grease which is the correct lubricant for rubber seals.

[ProDave]

What nobody has mentioned yet, is if you cut any of the pipes to reconfigure the run to move the drain, then make sure you chamfer the outer edge of the cut so it feeds into the seal gently (with the correct silicon lubricant as already mentioned)  Trying to insert a blunt square edge cut is a common reason for damaging the seal.