The builders who did my house in the 80s managed to get the soil pipe from the toilet to the stack (about 1.3 metres) with absolutely zero fall. Amazing that it never leaked. When I redid the bathroom this year, the tiled floor gave me about 10mm, the new toilet had a more horizontal outlet, and this fixed the problem.
Thanks for the videos, find them very interesting and easy to understand. Wondering if you could just clarify something? It seems most manufacturers (Floplast as an example) supply their T's and bends as 92.5 deg. This 2.5 deg fall works out as 1 in 23, almost twice the maximum 1 in 40 fall (1.43 deg) you suggest. Surely the manufacturers have got a pretty good idea of the slope required for a soil pipe and are suggesting 2.5 deg (~40mm over 1m ) is approximately the drop to be aiming for?
Great video … really clear. So I took your advice and made sure I had correct fall etc and everything was just fine, I fitted my close coupled toilet, thinking to myself 'I'll just run some 4 inch pipe along the inside wall and connect up' … but of course the toilet outlet is much too close to the wall to fit a McAlpine bent thingy or anything else really.... so any suggestions will be REAL welcome, thanks.BTW if the fall is supposed to be 1 / 40 to 1 /110 why are all the fittings you can buy angled at 2.5 degrees (which is a fall of about 1 / 23 which is far too steep according to this video) ????Thanks again guys.
This might be a silly question, why is my branch angle 92.5 when this angle would give me a drop of roughly 1/22? Would this be fine for outdoor runs of under 1 meter? Love the channel BTW, very helpful
Great video as always. Small point though, should your 3m measurement not be 7.5cm of the floor? 6.5cm + 1cm for your finishing height. Not going to matter too much as you have a reasonable run on the pipe.
Great video, doing my loft and was worrying about having enough drop but this has made it so much more simple to understand, also I didn't realise it wasn't that steep of a gradient i thought it would have been more. Cheers pal 👍🏻 becoming a dab had at the old plumbing 👌🏻
Studio looking brilliant bud great work, another brilliant video for all the apprentices out there will definitely be sending a link to mine as he struggles with soil. And If Anyone in the comments don’t follow plumber parts on instagram get over there! Lots going on and some great people on the page too that youll speak to along the way
HI James, great channel. Loads of hints and tips. I’m no plumber or apprentice, just an average bloke wanting to give it a go. I looked else where that mentions “breathing?”. I guess if water and soil moves in one direction air moves in the opposite???? Kinda like a bottle of ketchup, I suppose🤷🏻♂️? I just read what I wrote and makes no sense! Thanks David
Most soil systems in the uk have an open vent on the system , this stops compression and back siphonage to allow the air to move freely . A durgo or air admittance valve allows air in to stop siphonage but not out hence keeping the smell in .
I usually measure from the centre of pipes. Reason being that it's simpler if you have a change in the diameter of pipe somewhere (and even for the same nominal diameter of pipe, the external diameter is not always the same due to flanges etc). Of course, you're somewhat guessing where the centre is - but as long as you're reasonably accurate it's not a problem. If you really want what you can do is find the exact centre by measuring top, bottom and taking an average.
Here's a question ..recently refitting a bathroom thats been in since the house was built (18yrs) and the soil pipe from the toilet to the T actually has a negative fall on it. As in it falls towards the toilet by 10 - 20 mm obviously thats a concern but its been in and functioning for that long without giving any hideous odours or leaks. My question is how can I rectify what I will generously refer to as price work by the original plumber. (I'm not a plumber...though I suspect based on this house neither was he )
What do you do if you have a 3 metre run using 1/100 on the 1st floor then it drops through the floor to the ground floor level by 40 cm & you want to run at ceiling height for another 7 metres with a couple of 90 bends along the way to connect to main soil pipe ? Is this doable & what would the safest drop be ? Would this still be good between drop 1/40 to 1/110 ? How do you compensate for the bends ? downstairs floor to ceiling height 235cm Fantastic vids Thanks !
Instead of using 90 bends I'd try and use short swept 45's where possible , allowing for more adequate flow along the remaining length of the pipe after the drop up to where it reaches the stack( 7 meters ) .1 -110 will work just fine, since its only a 3 meter to 7 meter differential in run from the initial drop. Obviously I cannot see exactly where this is being implemented which would possible void my opinion. Still I hope this helps.
Hey bruvaaa. But what happens if your moving the toilet upstairs? Where there isnt a waste pipe on the outside of the building? (old victorian house with bathroom downstairs through the kitchen style)
Is there a video where you show a fix on an installed pipe? Like if there is a belly or a cracked section and you have to cut and replace a section of the pipe. I have an underground portion of my sewer pipe that needs replacing. The pipe is fixed. To get it to move a little bit after I cut it I would need to dig a very large trench which I cannot do. Thanks
plumberparts glad to have seen this video in the past and to have this question answered. I am moving the toilet to the other side of the room which will have 8 ft piping then a bend followed by 10 ft pipe to the toilet 🚽, just been advised to get a Saniflow system. Cheers 🍻 for the video mate, really helped.
Alright James. Any chance of doing a video of how to connect 110mm pvc soil pipe to a cast iron soil stack? I need to cut a section out of a cast iron stack to insert a Tee to join a 110mm PVC pipe from another toilet. I cant replace the whole cast iron stack with PVC so need to cut the fitting into it somehow. Any suggestions on fittings would be cool too. Cheers
@@janjuag In these years of practise I learnt that the smaller the pipe the bigger the slope needed but for 32-40-50 mm normally 2 or 2.5 cm per meter is OK. 8f runs are longer then 5 meters in horizontal lenght a bit more is required not too much though. It also depend how much space you've got
Hi, If I have a horizontal 70cm length pipe straight from the pan spigot at 1:25 and then a 92.5° bend followed by a 1m pipe falling at about 1:40-ish (maybe 1:35-ish) to the stack will the water run too fast to carry the waste, especially over the 70cm section or will I get away with it?
I guess you're worried about the 70cm bit. Should be fine mate. If you get a sec join the *LIVE STREAM TONIGHT at 6:30pm* - *_Open to all_* Bang the🔔too! ruclips.net/video/TRJJjTkdENw/видео.html
hi, what happens if the start of the run at the toilet end had to be almost level or even level due to obstacles and issues under a floor and then the rest say 4mtrs could drop as required, could this cause blockages? A
I believe when Joseph Bazelgette designed the London sewers in the 1860s, he had a minimum fall of 1 in 200. Drainage has to achieve a self cleansing velocity. Too steep, water flows too fast and leaves the 'solids' behind. Too shallow, and the velocity isn't great enough to keep the solids moving. Or, just do what groundworkers do when laying drains and they're not using a laser. Just tape a thin piece of wood to one end of your spirit level.
Anybody help...I’ve just bought a house and just noticed the Down pipes have no drainage and the water is just running onto the ground, any ideas please
This is great I have been pointing out to some residents that water does not flow upstream as the had renter plumbers in so I will send them this video, I didn't want to tell them my profession as it always leads to "can you" and the answer is no no no! I did tell the renter plumbers pls get the fall correct well that fell on deaf ears! and guess what, you guessed it we are getting regular blockages, they are now getting a "recommended Plumber" in to start all over again. shit happens.
Why not work back from the lowest point, set your pipe up so that it is LEVEL then raise the toilet end up by 1cm per 1 Meter, if you measure of the floor you could be way out
It's not good practice to do that as the cement can eat out copper brass wrap the pipe in insulation tape or denso tape or use pipe lagging that's usually not an option in alot of cases
I feel that you need to be admonished for your lavatorial humour, references to bestial acts and pornography. She (who must be obeyed) scolded me for teaching our 4 yr old the pull my finger-blow a raspberry joke. Big mother is watching you!
Can't believe you Pommy plumbers talk/measure in centimeters, whats worse, you also occasionally use millimeters. Just heard 6.5 mm when he meant 6.5cm, 11:07 . This brings about confusion and therefore mistakes. In Australia all builders use millimeters and meters only, like 3692mm and 10.5m, so very unlikely for confusion.
Informative and I would have probably come back for more tutorials, but you are stretching it way too long, which was at times way too embarrassing for me to watch your posing.
"often the fall [...] isn't really going to be something you can define yourself properly" "grey soil pipe" - coz that's different to black pipe, right? Do you have a team of writers for these jokes?
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Cheers, water feature builder here, used to plumbing them, but now re-fitting my bathroom so your channel has been a great resource!
The builders who did my house in the 80s managed to get the soil pipe from the toilet to the stack (about 1.3 metres) with absolutely zero fall. Amazing that it never leaked. When I redid the bathroom this year, the tiled floor gave me about 10mm, the new toilet had a more horizontal outlet, and this fixed the problem.
Thanks for the videos, find them very interesting and easy to understand. Wondering if you could just clarify something? It seems most manufacturers (Floplast as an example) supply their T's and bends as 92.5 deg. This 2.5 deg fall works out as 1 in 23, almost twice the maximum 1 in 40 fall (1.43 deg) you suggest. Surely the manufacturers have got a pretty good idea of the slope required for a soil pipe and are suggesting 2.5 deg (~40mm over 1m ) is approximately the drop to be aiming for?
Great video … really clear. So I took your advice and made sure I had correct fall etc and everything was just fine, I fitted my close coupled toilet, thinking to myself 'I'll just run some 4 inch pipe along the inside wall and connect up' … but of course the toilet outlet is much too close to the wall to fit a McAlpine bent thingy or anything else really.... so any suggestions will be REAL welcome, thanks.BTW if the fall is supposed to be 1 / 40 to 1 /110 why are all the fittings you can buy angled at 2.5 degrees (which is a fall of about 1 / 23 which is far too steep according to this video) ????Thanks again guys.
Excellent videos, really helpful for us novice DIY plumbers. Keep up the great info!
This might be a silly question, why is my branch angle 92.5 when this angle would give me a drop of roughly 1/22?
Would this be fine for outdoor runs of under 1 meter?
Love the channel BTW, very helpful
Entertaining and informative , brilliant videos 👍👍
Great video as always.
Small point though, should your 3m measurement not be 7.5cm of the floor? 6.5cm + 1cm for your finishing height.
Not going to matter too much as you have a reasonable run on the pipe.
Great video, doing my loft and was worrying about having enough drop but this has made it so much more simple to understand, also I didn't realise it wasn't that steep of a gradient i thought it would have been more. Cheers pal 👍🏻 becoming a dab had at the old plumbing 👌🏻
Love this channel, helped me loads over many years now. Keep up the great work mate 👍🏻
Studio looking brilliant bud great work, another brilliant video for all the apprentices out there will definitely be sending a link to mine as he struggles with soil. And If Anyone in the comments don’t follow plumber parts on instagram get over there! Lots going on and some great people on the page too that youll speak to along the way
HI James, great channel. Loads of hints and tips. I’m no plumber or apprentice, just an average bloke wanting to give it a go. I looked else where that mentions “breathing?”. I guess if water and soil moves in one direction air moves in the opposite???? Kinda like a bottle of ketchup, I suppose🤷🏻♂️? I just read what I wrote and makes no sense!
Thanks
David
Most soil systems in the uk have an open vent on the system , this stops compression and back siphonage to allow the air to move freely . A durgo or air admittance valve allows air in to stop siphonage but not out hence keeping the smell in .
We did this in college yesterday, same working out for gutters too
First time on your channel, Love Comedy, Great video
Thanks so much for this video. Great Information 😊
I have 2 situations: (A) 3% on 100mm @ 3.3m run with one 45 degree turn. Will this work. (B) What about 8% @ 1.2m run with one 90 degree turn. Cheers.
I usually measure from the centre of pipes. Reason being that it's simpler if you have a change in the diameter of pipe somewhere (and even for the same nominal diameter of pipe, the external diameter is not always the same due to flanges etc). Of course, you're somewhat guessing where the centre is - but as long as you're reasonably accurate it's not a problem. If you really want what you can do is find the exact centre by measuring top, bottom and taking an average.
Great explanation
Here's a question ..recently refitting a bathroom thats been in since the house was built (18yrs) and the soil pipe from the toilet to the T actually has a negative fall on it. As in it falls towards the toilet by 10 - 20 mm obviously thats a concern but its been in and functioning for that long without giving any hideous odours or leaks. My question is how can I rectify what I will generously refer to as price work by the original plumber. (I'm not a plumber...though I suspect based on this house neither was he )
What do you do if you have a 3 metre run using 1/100 on the 1st floor then it drops through the floor to the ground floor level by 40 cm & you want to run at ceiling height for another 7 metres with a couple of 90 bends along the way to connect to main soil pipe ? Is this doable & what would the safest drop be ? Would this still be good between drop 1/40 to 1/110 ? How do you compensate for the bends ? downstairs floor to ceiling height 235cm Fantastic vids Thanks !
Instead of using 90 bends I'd try and use short swept 45's where possible , allowing for more adequate flow along the remaining length of the pipe after the drop up to where it reaches the stack( 7 meters ) .1 -110 will work just fine, since its only a 3 meter to 7 meter differential in run from the initial drop. Obviously I cannot see exactly where this is being implemented which would possible void my opinion. Still I hope this helps.
Thanks for your reply worth
Looking at . Job not complete due to covid & overseas property so still relevant ! cheers J
Don't forget to provide George with a nice sleeping station ! Good example of the maths involved to get pipe slope right.
Studio is looking great! Nice work
Thank you for the great videos mate.
Quick question: What is the smallest size air vent pipe we're allowed to use for toilets?
Thank you
4"
Great video again mate really helpful atb👍
Hi, Did you mean 1:100 shallow ? My understanding is 1:10 is even steeper than 1:40, correct?
Good video mate is there an actual Sprit level you can get that the vial will show you 1/40 fall ect.
Hey bruvaaa. But what happens if your moving the toilet upstairs? Where there isnt a waste pipe on the outside of the building? (old victorian house with bathroom downstairs through the kitchen style)
Is there a video where you show a fix on an installed pipe? Like if there is a belly or a cracked section and you have to cut and replace a section of the pipe. I have an underground portion of my sewer pipe that needs replacing. The pipe is fixed. To get it to move a little bit after I cut it I would need to dig a very large trench which I cannot do. Thanks
loving the fake grass for a chipping mat 😂 and the wedge above it .. niice
Does a bend in the pipe around a corner impact the fall gradient? Does it still just need to be 1/40 a 1/110?
Bends don't affect the fall gradient, so should all be good!
plumberparts glad to have seen this video in the past and to have this question answered. I am moving the toilet to the other side of the room which will have 8 ft piping then a bend followed by 10 ft pipe to the toilet 🚽, just been advised to get a Saniflow system.
Cheers 🍻 for the video mate, really helped.
Absolutely mad but very good!
Alright James. Any chance of doing a video of how to connect 110mm pvc soil pipe to a cast iron soil stack? I need to cut a section out of a cast iron stack to insert a Tee to join a 110mm PVC pipe from another toilet. I cant replace the whole cast iron stack with PVC so need to cut the fitting into it somehow. Any suggestions on fittings would be cool too. Cheers
If the slope for 111mm diameter pipe must be between 1/40 1/110, which slope would be correct for 32,40 and 50 mm pipe? Please answer me
This was my question as well which hasnt answered..
@@janjuag In these years of practise I learnt that the smaller the pipe the bigger the slope needed but for 32-40-50 mm normally 2 or 2.5 cm per meter is OK. 8f runs are longer then 5 meters in horizontal lenght a bit more is required not too much though. It also depend how much space you've got
Hi, If I have a horizontal 70cm length pipe straight from the pan spigot at 1:25 and then a 92.5° bend followed by a 1m pipe falling at about 1:40-ish (maybe 1:35-ish) to the stack will the water run too fast to carry the waste, especially over the 70cm section or will I get away with it?
I guess you're worried about the 70cm bit. Should be fine mate. If you get a sec join the *LIVE STREAM TONIGHT at 6:30pm* - *_Open to all_* Bang the🔔too! ruclips.net/video/TRJJjTkdENw/видео.html
@@plumberparts Great! Thank you James. :) Appreciate your time and really helpful fun videos.
hi, what happens if the start of the run at the toilet end had to be almost level or even level due to obstacles and issues under a floor and then the rest say 4mtrs could drop as required, could this cause blockages? A
You are brilliant
if 2 houses are built on a 1 acre land the back house how far can toilet waste pipe run before it needs a pump to push it ?
I believe when Joseph Bazelgette designed the London sewers in the 1860s, he had a minimum fall of 1 in 200.
Drainage has to achieve a self cleansing velocity. Too steep, water flows too fast and leaves the 'solids' behind. Too shallow, and the velocity isn't great enough to keep the solids moving.
Or, just do what groundworkers do when laying drains and they're not using a laser. Just tape a thin piece of wood to one end of your spirit level.
Good tip,I'll keep that one.
Is it 1/110 because of the size of the watse ?
6.52 Micky Flanagan lol studio looks well good btw.
Ram it in with spit 😂😂😂 spat my tea out!
2:08 - I think it’s the other way round. 1:10 is really steep (10% gradient) and 1:40 is quite shallow (2.5%)
He said 1:110 first time. Small brain fart I'm sure ;) although even I went back to listen again! xD
So the drop should be around 1.0 - 2.5 % or 0.52 - 1.43 degrees ? xP
Ok I got it now, air admittance valve regulations! How and when do I know when to use one?
Is it possible to run the soil pipe outside from the under first floor bedroom (8.9FT)to corner landing area ?
Good vid.. great new studio!
Can you do a video on connecting a new toilet waste into a cast iron soil pipe ?
For a waste pipe or soil pipe it’s 18mm per metre so if it’s 3mx18=54 simple
So, as the devil is in the detail a good target to aim at would be 1 in 66.6 (your 1.5cm per metre). Many thanks for a great video.
I need help. Want to move my toilet from the outside wall to one comnect to the neighbours to maximise my bathroom space. Is this possible?
I need help deciphering what you are saying but I am keeping up as best I can.
Should there be a vent somewhere, what is the rule for vent distance way from the pans ?
Cool stuff
In nz we do 100mm at 1.65% then 32 to 65mm at 2.5%
Making good progress!
Anybody help...I’ve just bought a house and just noticed the Down pipes have no drainage and the water is just running onto the ground, any ideas please
good and specific.
This is great I have been pointing out to some residents that water does not flow upstream as the had renter plumbers in so I will send them this video, I didn't want to tell them my profession as it always leads to "can you" and the answer is no no no! I did tell the renter plumbers pls get the fall correct well that fell on deaf ears! and guess what, you guessed it we are getting regular blockages, they are now getting a "recommended Plumber" in to start all over again. shit happens.
Good channel...ditch the centimetres stuff please....use mms...less chance of mistakes and misunderstanding
keep it up
Hi. Just wanna say. Really good mate thanks. Do you know a joiner who is as good as you are at plumbing on you tube. Really good thanks
Ha! Dunno mate! If you get a sec, follow my Instagram too...might find a joiner there! www.plumberparts.co.uk/social.php?social=Instagram
I could look into your eyes all night long..
Would it be poor doing every 1metre to 2cm?
That should be absolutely fine being that it works out at 1/50 gradient.
@@bluecheese1066 thanks
Why did you not just pull a string line from the top of the first clip to the top of the last clip???
CHECK MY INSTAGRAM INNIT! www.plumberparts.co.uk/social.php?social=Instagram
18mm per metre minimum gradient please
what is the name of the song
Why not work back from the lowest point, set your pipe up so that it is LEVEL then raise the toilet end up by 1cm per 1 Meter, if you measure of the floor you could be way out
Forgot to put your cards at the end mate!
6.5mm or 6.5cm
Your plumber card has been revoked for using that centimeters crap. Real plumbers only use millimetres.
Hi can u tell me if it is safe to bury copper pipes into concrete wall etc thanks
It's not good practice to do that as the cement can eat out copper brass
wrap the pipe in insulation tape or denso tape or use pipe lagging that's usually not an option in alot of cases
gaffer tape or duct tape it
Very helpful , sometimes get you units of measurement mixed up ... 6.5cm not 6.5mm! too much beer
so 1 cm per metre drop
Bit disappointing you cut the bit when you were spitting on the pipe to lube it.
I feel that you need to be admonished for your lavatorial humour, references to bestial acts and pornography. She (who must be obeyed) scolded me for teaching our 4 yr old the pull my finger-blow a raspberry joke. Big mother is watching you!
bro i wanna work for you
surely 1 in 10 is steeper than 1 in 40? 1 in 10 is equivalent to 4 in 40?
sorry i misheard, you meant 1 in 110. ignore me! hold tight!!
Can't believe you Pommy plumbers talk/measure in centimeters, whats worse, you also occasionally use millimeters.
Just heard 6.5 mm when he meant 6.5cm, 11:07 .
This brings about confusion and therefore mistakes. In Australia all builders use millimeters and meters only, like 3692mm and 10.5m, so very unlikely for confusion.
Normally just do it by eye tbh 😂😂
showers on a ground floor with concrete flooring
Informative and I would have probably come back for more tutorials, but you are stretching it way too long, which was at times way too embarrassing for me to watch your posing.
KN Todorov that’s how he’s always been and what makes his videos unique and entertaining
"often the fall [...] isn't really going to be something you can define yourself properly"
"grey soil pipe" - coz that's different to black pipe, right?
Do you have a team of writers for these jokes?
Cheese Whiz, your MUSAK is LOUD!!!
Is it porn studio??
Not fanny quite perfect
With all the effort this guy says he's putting into making these videos; you would think he would bother to learn English.
I'm sorry mate, I can't understand a word you're typing!
@@plumberparts Maybe, the fumes from those pipes, are getting to you?
annoying or what
Becoming crude.