Awkward asbestos pipe encapsulation

[battenburg]

This wastewater pipe from a sink and washing machine are plastic, but then seem to drop into another pipe which then runs embedded in a concrete floor before outflowing into a grate outside.

The outside end of the pipe has been tested and is asbestos, so I am assuming that the whole length of the pipe under the concrete is the same. Some kitchen units that were above have just been removed, so you can see how the plastic pipe drops into the floor for the first time. It almost looks like there is a lip from the pipe which just protrudes above the general elevation of the concrete. It also seems like the concrete might have been screeded over, hence there being a bit of a hump in the floor. But, its all pretty grubby under there so I’m not completely sure.

I’d thought of maybe re-routing the pipework so that it no longer goes under the floor and basically abandon this pipe entirely but that is complicated by the position of the grate outside and an external door in the way. So at the moment I think the pipework stays as is. Its looks like the lip of the pipe may have deteriorated slightly and perhaps been chipped, but I’m hoping that is historic as none of the current work involves moving this.

What is my best approach here? Maybe just painting over the ‘lip’ of the pipe that sticks out? This isn’t a high use area, but it may no longer be under a kitchen unit (going for more of a freestanding approach rather than fitted units). Is there any kind of flexible cover that could be draped over the top? I’m thinking like a plaster cast almost, but for building materials. Not sure if such a thing exists! I’m a bit nervous about this kind of thing, even though I know this is low risk stuff. I had a refurbishment survey done before the work started and luckily the pipe was the only thing that was positive so I've tried to be a thorough as I can. It isn't actually being changed as part of the work and I've told the builders not to touch it, but seeing it there does make me a bit uneasy. Thinking to wear a mask, gently clean the area with a damp cloth and then daub a thick layer of paint over it.

What I would say is that where the pipe drops into the grate outside the diameter is very similar to the plastic pipe. So these images make it seem like there is almost a wider 'sleeve' on the pipe under the concrete. Is that common for this kind of configuration?

 

[noseall]

This wastewater pipe from a sink and washing machine are plastic, but then seem to drop into another pipe which then runs embedded in a concrete floor before outflowing into a grate outside.

The outside end of the pipe has been tested and is asbestos, so I am assuming that the whole length of the pipe under the concrete is the same. Some kitchen units that were above have just been removed, so you can see how the plastic pipe drops into the floor for the first time. It almost looks like there is a lip from the pipe which just protrudes above the general elevation of the concrete. It also seems like the concrete might have been screeded over, hence there being a bit of a hump in the floor. But, its all pretty grubby under there so I’m not completely sure.

I’d thought of maybe re-routing the pipework so that it no longer goes under the floor and basically abandon this pipe entirely but that is complicated by the position of the grate outside and an external door in the way. So at the moment I think the pipework stays as is. Its looks like the lip of the pipe may have deteriorated slightly and perhaps been chipped, but I’m hoping that is historic as none of the current work involves moving this.

What is my best approach here? Maybe just painting over the ‘lip’ of the pipe that sticks out? This isn’t a high use area, but it may no longer be under a kitchen unit (going for more of a freestanding approach rather than fitted units). Is there any kind of flexible cover that could be draped over the top? I’m thinking like a plaster cast almost, but for building materials. Not sure if such a thing exists! I’m a bit nervous about this kind of thing, even though I know this is low risk stuff. I had a refurbishment survey done before the work started and luckily the pipe was the only thing that was positive so I've tried to be a thorough as I can. It isn't actually being changed as part of the work and I've told the builders not to touch it, but seeing it there does make me a bit uneasy. Thinking to wear a mask, gently clean the area with a damp cloth and then daub a thick layer of paint over it.

What I would say is that where the pipe drops into the grate outside the diameter is very similar to the plastic pipe. So these images make it seem like there is almost a wider 'sleeve' on the pipe under the concrete. Is that common for this kind of configuration?

View attachment 401047View attachment 401048

If the protruding pipe is merely a (soon to be defunct) duct, pull the waste out, don a decent dust mask, wet down the area, break the pipe away enough to be able to screed repair the hollow bit remaining, hoover up the dust and repair. Double bag the bits and dump them in the bin.

 

[battenburg]

I think in future it would make sense to abandon the pipe, in which case this seems a good approach.

At the moment though it is staying in-situ as it would be complex to sort the drainage outside. So I’m aiming to keep it safe whilst it is still in use and the kitchen units are moved a bit.

 

[noseall]

I think in future it would make sense to abandon the pipe, in which case this seems a good approach.

At the moment though it is staying in-situ as it would be complex to sort the drainage outside. So I’m aiming to keep it safe whilst it is still in use and the kitchen units are moved a bit.

Two coats of PVA solution.

 

[footprints]

AS said couple of coats of paint or perhaps pva first coat diluted on both.
Decant paint into container to avoid contaminating rest of paint and dispose of the brush.