Search the forum,

Discuss Lowering plastic bath waste pipe through cavity wall into cast iron gutter downpipe in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Status
Not open for further replies.
B

broontroot

Hi
hope you guys can help......

I'm fitting a new bathroom suite and shower, but i have concrete floors.
My old shower tray was sitting on an 8 inch deep timber frame, so as to get the height required for the shower water to run downhill ,along under the bath, then into the bath waste pipe,before going through the cavity wall and into the cast iron down-pipe/stack.

I can see that my 40mm plastic waste pipe is around 5 inches above floor level, so ideally i'd like to hire a core drill and lower the waste pipe where it goes through the wall, which would then allow me to lower the new shower tray, so that it's not so much of a step out of it with wet feet.

I'm looking for advice on how to connect 40mm plastic to a three and a half inch diameter cast iron stack.The stack runs up into the guttering.

I've heard there are quick fitting couplings available, but i'm not sure exactly what i'd need?

Would it be possible for me to drill a completely new 40mm waste pipe hole in the cavity wall, *at floor level*, maybe 6" along from the original hole, then when the new 40mm plastic pipe exits the wall, could i use a 90degree elbow, together with a short straight section?
Could i then drill a hole in the side of my cast iron exterior stack, insert the new plastic 40mm waste pipe and silicone round it?

Here is a couple of pics, hopefully you'll understand what i'm talking about !

You can see where the small dia. cast waste exits the wall into the stack, just under the top 'collar' thing.
You can also see that the 40mm plastic waste could be lowered to floor level

Any info much appreciated.
cheers




 
Status
Not open for further replies.

Reply to Lowering plastic bath waste pipe through cavity wall into cast iron gutter downpipe in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Similar plumbing topics

I was stupid enough not to check the position of the pipes under the tiles when installing a toilet and drilled right through the center of a 16 mm copper water pipe. I exposed the pipe by removing a ~30cm section of the plastic sleeve and a ~10 cm section of the pipe around the hole. Several...
Replies
0
Views
187
Hello all, I’m replacing a concrete paving slab patio in the back yard. The original patio used 50mm deep concrete slabs on hardcore & sand. I’m planning to pour a 100mm deep concrete patio on 100mm hardcore. In order to achieve the same final height to line up with the rest of the patio, I...
Replies
6
Views
232
Copper pipes, I think its fair to say, is not what it used to be, the copper is getting thin while the cost is going up. Meanwhile, plastic Pushfit seems to be getting better and better, cost and convenience was always better, but now the quality is to, have we reached a stage where plastic will...
Replies
2
Views
242
Hello all, I'm would like to extend an existing outside tap to another point in the garden. I'm about to pour a concrete patio and was hoping to run the water line underneath. There are existing drain (and who knows what) pipes running along the same wall so I'm nervous about digging too far...
Replies
6
Views
228
Hi, Can anyone advise as to why the cold water to my bathroom keeps airlocking? This originally happened about 12 months ago and has happened 3-4 times since. It’s an upstairs bathroom, fed from a tank in the attic. The tank is about 8 Meters away and feeds a bath, sink and toilet. The tank...
Replies
9
Views
324
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock