Toilet/rainwater into soil stack

Swasterix

Carrot007 said:

Swasterix said:

daivid said:

If you do as Doozergirl suggests (which I would) you wont need to replace the down pipe as you will be running the toilet waste into the existing soil stack. Cost will be minimal: an elbow joint or two and a piece of 110mm soil pipe (which can be the cheaper brown pipe as it won't be exposed to light). The main thing to check is you can maintain a good gradient from the new toilet location to the point you join the existing stack. 1 in 40 is the ideal IIRC though it doesn't have to be exactly that.

Aah, I’ve fully misunderstood what Doozer was saying in that case! Apologies!

I don’t think that would be a possibility unfortunately. I intend to put a shower cubicle in the place where the toilet is currently, so wouldn’t be possible to run it that way I don’t think. Also, the back of the toilet would be on the back wall of the house where the gutter down pipe runs. Hope that makes sense!

Could still do it outside if the drop was enough as said. Though I would not. DIY the new stack costs hardly anything. It's all cheap plastic pipe. A stack in the right place would look better. It's basically change the bottom drain to a closed one. (if that leafy bit is actually part of the drain with an open cover?). Digging up the concrete is a pain. But it's not much, saw to cut lines and pick option on sds.

However is is effort! But if you are prepared then it is easy. I replaced around 3 metres of collapsed sewer at my old house. Had to kill a wet vac doing it. as icky backed up! (Had to get next door to do their part as well but was council). Also reaplced the water main incoming from lead which was 15 metres and a bit of digging a hole! That's where the cost comes in for such jobs. The labour!

Swasterix said:

Carrot007 said:

Cutting the hole though the wall for toilet waste is a right pain.

I recently had to cut one for an extractor fan outlet, was not fun 😂

Should be ok then! I once did one usinf nothing more than a 15 mm drill bit meant to make a hole for a copper pipe (ok so 16mm I would guess more than 15!). Many holes, big circle. Did the job. Better tools were unfortunatly not taken to the house that day!

Excellent, that sounds promising. I’d consider myself a more than competent diyer, so reckon it’s within my capability. Don’t mind getting stuck in at all. 

Appreciate the input!

Swasterix

flashg67 said:

Carrot007 said:

Cutting the hole though the wall for toilet waste is a right pain.

I recently had to cut one for an extractor fan outlet, was not fun 😂

Should be ok then! I once did one usinf nothing more than a 15 mm drill bit meant to make a hole for a copper pipe (ok so 16mm I would guess more than 15!). Many holes, big circle. Did the job. Better tools were unfortunatly not taken to the house that day!

Cost me less than £25 to rent a diamond hole saw, drill & transformer to do mine - took me about an hour (my first time having a go at a job like this!) but was pleased at how neat the job was. I used push fit soil pipe & fittings and a 'durgo' valve to avoid having to take the stack above the roof line. 

I too used a diamond hole saw, and also took around half an hour. Arms didn’t thank me after!

Doozergirl

Swasterix said:

daivid said:

If you do as Doozergirl suggests (which I would) you wont need to replace the down pipe as you will be running the toilet waste into the existing soil stack. Cost will be minimal: an elbow joint or two and a piece of 110mm soil pipe (which can be the cheaper brown pipe as it won't be exposed to light). The main thing to check is you can maintain a good gradient from the new toilet location to the point you join the existing stack. 1 in 40 is the ideal IIRC though it doesn't have to be exactly that.

Aah, I’ve fully misunderstood what Doozer was saying in that case! Apologies!

I don’t think that would be a possibility unfortunately. I intend to put a shower cubicle in the place where the toilet is currently, so wouldn’t be possible to run it that way I don’t think. Also, the back of the toilet would be on the back wall of the house where the gutter down pipe runs. Hope that makes sense!

The waste pipe can run sideways from the toilet.  It's exactly what I have in my house and you'd never know.  

Yours would exit the house on the same wall as the soil stack, by the corner, and travel the rest of the journey over the flat roof. 

As said by someone else, it doesn't involve the rain water pipe.  

Swasterix

Doozergirl said:

Swasterix said:

daivid said:

If you do as Doozergirl suggests (which I would) you wont need to replace the down pipe as you will be running the toilet waste into the existing soil stack. Cost will be minimal: an elbow joint or two and a piece of 110mm soil pipe (which can be the cheaper brown pipe as it won't be exposed to light). The main thing to check is you can maintain a good gradient from the new toilet location to the point you join the existing stack. 1 in 40 is the ideal IIRC though it doesn't have to be exactly that.

Aah, I’ve fully misunderstood what Doozer was saying in that case! Apologies!

I don’t think that would be a possibility unfortunately. I intend to put a shower cubicle in the place where the toilet is currently, so wouldn’t be possible to run it that way I don’t think. Also, the back of the toilet would be on the back wall of the house where the gutter down pipe runs. Hope that makes sense!

The waste pipe can run sideways from the toilet.  It's exactly what I have in my house and you'd never know.  

Yours would exit the house on the same wall as the soil stack, by the corner, and travel the rest of the journey over the flat roof. 

As said by someone else, it doesn't involve the rain water pipe.  

Doh! Yeah I see what you mean now, think my brain had shut down for the night! We got there in the end!

We are hoping to add a double storey side extension at some point in the near future, so maybe wasted effort to go that way. But I guess it would be quicker/cheaper/easier in the short term!

Thanks again for all your replies

Doozergirl

Swasterix said:

Doozergirl said:

Swasterix said:

daivid said:

If you do as Doozergirl suggests (which I would) you wont need to replace the down pipe as you will be running the toilet waste into the existing soil stack. Cost will be minimal: an elbow joint or two and a piece of 110mm soil pipe (which can be the cheaper brown pipe as it won't be exposed to light). The main thing to check is you can maintain a good gradient from the new toilet location to the point you join the existing stack. 1 in 40 is the ideal IIRC though it doesn't have to be exactly that.

Aah, I’ve fully misunderstood what Doozer was saying in that case! Apologies!

I don’t think that would be a possibility unfortunately. I intend to put a shower cubicle in the place where the toilet is currently, so wouldn’t be possible to run it that way I don’t think. Also, the back of the toilet would be on the back wall of the house where the gutter down pipe runs. Hope that makes sense!

The waste pipe can run sideways from the toilet.  It's exactly what I have in my house and you'd never know.  

Yours would exit the house on the same wall as the soil stack, by the corner, and travel the rest of the journey over the flat roof. 

As said by someone else, it doesn't involve the rain water pipe.  

Doh! Yeah I see what you mean now, think my brain had shut down for the night! We got there in the end!

We are hoping to add a double storey side extension at some point in the near future, so maybe wasted effort to go that way. But I guess it would be quicker/cheaper/easier in the short term!

Thanks again for all your replies

It will be much, much easier to quickly do the digging for a new soil stack with the footings for a new extension.  It would take minutes. 

You'd also save on building control fees for the new stack as they'd be included with the extension. 

No real impact on the new bathroom, just make sure your boxing is removable so behind the loo can be accessed quickly.  

The cost of doing it as suggested in the meantime is negligible.  

Carrot007

flashg67 said:

Carrot007 said:

Cutting the hole though the wall for toilet waste is a right pain.

I recently had to cut one for an extractor fan outlet, was not fun 😂

Should be ok then! I once did one usinf nothing more than a 15 mm drill bit meant to make a hole for a copper pipe (ok so 16mm I would guess more than 15!). Many holes, big circle. Did the job. Better tools were unfortunatly not taken to the house that day!

Cost me less than £25 to rent a diamond hole saw, drill & transformer to do mine - took me about an hour (my first time having a go at a job like this!) but was pleased at how neat the job was. I used push fit soil pipe & fittings and a 'durgo' valve to avoid having to take the stack above the roof line. 

Yes my way was due to taking the wrong tools and needed more covering up, but things tend to anyway! And yes took longer as well! Never again!