How to lower clay pipe

[londoner78]

Hi all,

My bathroom is in the basement of my house.

I had to remove my shower due to a leak and am now getting ready to replace it.

After taking it out I noticed that there is no drop on the shower waste pipe, so I want to cut the clay pipe back and remove some of the concrete floor to accommodate a drop.

I would raise the shower tray but the ceiling hight from the floor is only 213cm and I'm 188cm.

What's the best way to cut the clay pipe without breaking it? I need to drop it about 15cm

 

[Hugh Jaleak]

With great difficulty I think would be the answer. If you can break the concrete out without cracking the pipe, then you'll have done well.

Should you be able to get rid of the concrete and expose the pipe, then an angle grinder with a Stone disc will cut the pipe, you'll need enough room though to be able to cut all the way across.

 

[londoner78]

I'm wondering if it would be possible to open the top, block the pipe lower down and then cut from the inside maybe with a dremel with a diamond blade then crack the top of the pipe and lower the concrete to the cut.

 

[Hugh Jaleak]

I'm wondering if it would be possible to open the top, block the pipe lower down and then cut from the inside maybe with a dremel with a diamond blade then crack the top of the pipe and lower the concrete to the cut.

If you can, that would probably be the ideal method. Clay pipes are extremely fragile, the biggest issue is always breaking any concrete from around them without damaging the pipe itself. If the section to be removed is already separated from the rest, then the chances of the whole section cracking lengthways are reduced. I would still proceed with caution though, until depth of concrete is ascertained.

 

[matlob]

If fitting a new tray you may be able to get one with a corner waste so it will increase the fall.