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How to install a mechanical boss | cast iron pipe boss
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- Опубліковано 4 сер 2018
- In this video I install a mechanical boss onto a cast iron soil pipe. How to cut the 57mm hole in the soil pipe can be seen here- • how to cut a hole in a...
A mechanical boss can be used to connect a waste pipe, either 32mm or 40mm into a soil stack. Mechanical boss’s have the advantage that you can use them on cast iron or plastic soil pipes. There are a few different sizes available so please ensure you get the correct one.
More info on Mechanical Boss’s here- mcalpineplumbi...
Extremely grateful for this video. Had an ongoing issue with a shower that won’t drain. Pvc ran onto old lead that went through concrete floor to flat below (no access). Many questions asked about why the lead hadn’t been ripped out and why I can’t gain access, but thankfully with this I’ve got straight into the soil stack. Put a none return valve on the run at the off chance the water is pulled out the traps too as a failsafe incase of smells or gases. Thanks very much!
I’m glad you found the video useful
Thanks for the comment 👍
This video follows on from last weeks video about how to cut a hole in a cast iron soil stack- ua-cam.com/video/xm0GGDsw2OU/v-deo.html
I hope everyone has a great Sunday 😉
Awesome knowledge and narration, i could watch this guy all day and not tire of learning - and i would be confident that he presented it all completely and in the perfect order for one to learn and execute whatever he is demonstrating... Jett Enterprises/Cleveland, Ohio
Thanks for the comment 👍
Interesting. I always thought only a toilet waste should be connected to a soil stack, and all other waste should connect to a downpipe leading to a drain. Deffo learnt something new today. Great video yet again 👍🏽
No, all sink/basin/bath/shower wastes should be connected to the soil pipe, as it leads to the sewer.
Rain water drains do not always connect to the sewer 👍
Who the fuck told you that 😂
I just love your videos and instructions, as a DIYer they are GREAT - thank you so much for taking the time to make and share your knowledge. ANDREW
Thanks Andrew ;-)
Another excellent video. Only wish that all instructions were as clear an simple as yours.👌
Thanks for the comment
Got to do the same job. Thanks for clear and understandable explanation.
You are welcome
Thanks for the comment
Just what I needed! I was going to take off the top of the old soil stack and fit a completely new branch. This is a great suggestion!
I'm glad the video helped
Thanks for the comment 👍
Thanks for such clear and concise videos, you knowledge is amazing!
You are welcome
Thanks for the comment 👍
They are great fittings I use them often. Great video too !
Yes, I'm a fan of McAlpine stuff as it seems much better quality than some other stuff available.
Thanks for the comment
Thanks for making video. Should you put some sealant around the collar or will it be fine without it.👍👍👍👍👍
It should be fine without it. I did think about putting a nice bead around it, but then thought it might trigger a few people as you are not told to do it in the instructions ;-)
Thanks for the comment
Another outstanding video production!!! 😃👍
Thanks for the comment ;-)
Nice. I'd be tempted to run a bit of Sika flex around the boss flange though - just for a "belt and braces " effect.
Yes, I thought about that too but thought it might trigger some people as it's not suggested in the instructions.
Thanks for the comment
Very nice explanation 👍
Thanks for the comment 👍
Wow I’ve done plenty of cast in my plumbing life timesaver and ensign but I’ve never seen this type of boss before
Thank you for you great clear and extremely helpful videos.
One question does the specialist tool come with the boss or do you have to purchase it separately
Regards Micky
Hi Micky, the tool comes with the mechanical boss ;-)
You just need the holesaw and drill
@@ultimatehandyman
Thanks for getting back to me i have put a boss onto a cast iron stack a few times using starret cutter but the boss i used had to be bolted around the whole pipe and had four more bolts to connect the 11/2 pipe,this is so much more easier,thats the second plumbing tip ive picked up of you in 2wks and ive only been plumbing for 18years😂😂
@@micky7028 Brilliant, I’m glad the videos help 👍
i guess my bathroom fitter guy was too afraid to do this and i have a pump instead for the shower drain. doesnt seem too scary to do, good review!
Thanks for the comment
Jusb1066 what do you mean by a pump
I’d guess you didn’t have a sewer line low enough, or he wanted to save you the cost of jacking up concrete?
I’m not sure a self respecting plumber would use this, more of a diy. I’d see solids building up on the intrusion into stack, and a drain machine may break it while snaking.
Great point made about the drain snake cutting head chewing this to bits.
Whale pump
found this video very informative.
Thanks for the comment
However, as a general rule, i always apply a sealant to every connection in plumbing, as well (usually 100% silicone bath caulk) to ensure long life and a semi-flexible connection, in case it gets bumped or moved for any reason...
Thanks Linnie 👍
@@ultimatehandyman my bad, mom (linnie) passed recently, and i was using her laptop when i saw your video, and it defaulted to her account when i commented... sorry for the confusion here - Jeff
Good video and seems a good product. Just a thought, assuming you are not tempted to use a little glue , can you unscrew the connection if required?
Yes, you can unscrew one of these and remove it, if needed
Thanks for the comment 👍
I need to fit one to my soil pipe for water discharge from tank but the toilet waste is above, so this attachment would be approx 1 meter below … will toilet waste collect over time or am I over thinking?
Hello, do you have a boss for a 2 1/2" cast iron vent pipe?
No, I think they only make them for 4 inch pipe!
Great video very useful thank you.
You are welcome
Thanks for the comment
McAlpine now do these for a 50mm/2" pipe into a 110mm standard soil pipe. (BOSSCONN110Z-BL in Black or BOSSCONN110Z-GR for Grey)
Thanks for the comment
@@ultimatehandyman It was good to see one installed. I am installing two bathrooms, back to back, running into a single shared 50mm waste so it's good to find I can use a 50mm version rather than an awkward strap-on.
Wouldn't these need to be a "wye" shape?
Does it come with the special tool
Yes, it does.
Thanks for the comment
Nice. Will we be seeing the completed job?
No, this was just a demonstration using a old piece of cast iron pipe that I found in a skip at work.
Thanks for the comment
Ultimate Handyman OK, cheers. Have a great Sunday.
Thanks, you too ;-)
I know it's an older video..but is it a 57mm hole for both 32mm and 40mm pipe ?
Would you recommend drilling this into a cast iron tee/junction if there’s enough room? Shower tray was raised about 8 inches and they have ripped it out and now want a bath fitted so existing waste is way to high.
I'd try to avoid drilling into the Tee, I think they are thicker, so the boss might not work as intended.
@@ultimatehandyman 👍🏻
Love your vids! Can you solvent weld the adapter to a plastic soil pipe as well as the mechanical fixing please?
I don't think it will work, solvent weld pipe is made from a different type of plastic. If you try using PVC cement on non-solvent weld pipe it does not work.
Thanks for the comment 👍
@@ultimatehandyman Thank you for reply UH 👍👍
Is there a similar bit of kit for connecting new plastic soil pipe into an existing cast iron stack?
I don't think there is, this might be the only option- bit.ly/3Edg38B
Hi, great video. I have installed one of these but a 40mm pipe will not fit, the internal diameter of the boss is 38mm so the pipe is too big. Am I misunderstanding something?
Hi Tom,
They come in 2 different sizes, 32mm and 40mm, perhaps you have the incorrect one?
Interesting device, but I wonder could there be an issue with how far it encroaches into the existing pipe and could it cause an accumulation of solid matter over time.
I don't think there have ever been any problems with that, or if there have been problems I have never heard about them.
Thanks for the comment
Do these things last a long time? Can you sure it up with some epoxy under the cresent part that wraps around the pipe and maybe put a metal strap across the top and bottom?
Yes, these should last decades. I have never known one to fail 👍
@@ultimatehandyman Thank you for the response and thank you for being awesome!
Would these work on an internal pitch fibre soil stack?
They will work on any soil stack- but I don't like the sound of a fibre soil stack- it sounds like it might be asbestos!!!!!!!!!
Thanks for the comment 👍
Are these available for rain pipe.
Not to my knowledge, I've only ever seen them for 4 inch soil pipe!
Where can someone get this product? I live in Canada
They are widely available in the UK, perhaps you could ask a seller on eBay, if they could ship one out to Canada- www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p4432023.m570.l1313&_nkw=mechanical+boss&_sacat=0 👍
Can you do a stubborn bearing removal video ?
I'll add it to my list ;-)
Thanks for the comment
Can this be used on a vent stack pipe?
It depends on the situation; a vent stack is normally the higher part of a soil stack. You can use these on a soil pipe 👍
could you add one of these to a existing plastic toilet stack as a rodding/jetting point or is ther a better option. cheers
You can get a soil pipe access saddle, which should be better.
I've never fitted one, but page 121 of this PDF file shows how to fit one-
orbia.blob.core.windows.net/assets/F-25083-0.pdf
@@ultimatehandyman cheers for super quick reply .much appreciated , ill check the lionk out.
Question, instead of using a pipe with compression nut, can you get a a screw on cap, reason im asking is we have internal guttering with a downpipe that "occasionaly blocks, now ny idea is to fit one of these with a screw on cap, so when it does "block" I can unscrew cap on boss and clear out the crap easily, any ideas ????
Is the downpipe 3 inch or 4 inch?
If it's 3", the boss might not fit properly on the pipe, as these are made for 4 inch pipe.
Even then it might be difficult using it to clear out a blockage.
You might be able to get a screw on cap, but I've never seen one, you could use a short piece of pipe though and an access plug- www.screwfix.com/p/floplast-abs-access-plugs-white-40mm-5-pack/23322
@@ultimatehandyman Cheers, thank you for the reply, it's a 3" downpipe, i'll move to plan 42 !
Would this mechanical boss fitting work with a soil pipe that is horizontal? Thanks
Yes, but obviously have the boss hole on the top of the pipe 👍
I have a downstairs toilet but with no sink in the same space, can I tap into the toilet waste pipe?
You should be able to, if you use a boss like in the video.
Obviously if it is being connected to a horizontal pipe the boss will have to be positioned on the top of the pipe.
Is it worth putting silicone sealant on the back of the boss?
Just for the record, i just have and it is.
👍
Can you fit to a horizontal soil stack
Yes, as long as you fit it to the top of the pipe
👍🤓👍 Spot on as always
Thanks Wayne
It's a great product. Where can I order one?
Most plumbers merchants sell them, or online here- fave.co/3xgbhlf
I'm adding an macerator where the pipe will run up to it at a slight upward gradient. As it is powered flush could I install this upside down so the 5° is downhill. Before you lambast me. The run I have is only 3 meters and the manufacturer's assured me running up over this short distance will be fine as it can cope with a 45m head.
Many thanks.
It's not something I have ever done, and I'm no expert on macerators either, but I can't see why it would not work.
If you want to be 100% certain, you could always ask the manufacturers- bit.ly/2JK95wn
Thanks for the comment 👍
Possible to do a pressure leak test on that fitting?
It would be possible, but it would be a lot of work as you would have to bung the cast iron pipe at each end for the test.
Soil and waste fittings are not normally under and pressure (unlike mains water).
Thanks for the comment
Ok thank you.nice job.
Been looking for these in the US are they only used in the UK?
I don't think so. I looked before, but could not find them- perhaps they are called something else in the states?
Thanks for the comment 👍
@@ultimatehandyman Thanks for the quick reply. I wonder if the US plumbing code is different? Looks like I will have to cut in a Y in 1910 cast iron.
@@StanSwan Not sure, I know absolutely nothing about US plumbing codes!
(Sorry for the late reply, UA-cam comments has been playing up AGAIN, So I have just seen this)
@@ultimatehandyman No worries, I ended up needing to Y off with a 3 inch pipe so had to cut into the 3 inch stack anyway. Thanks you for the reply!
Hi have you got a link to this product as i cant seem to find it in local diy stores
You can get them on eBay- fave.co/2ofkUhi
Or screwfix sell them- fave.co/2BS6bCw
Thanks for the comment
Thanks for link you saved me a fortune local tradesmen wanted to replace my full cast iron system to plastic this has saved me the big cost and hassle thanks
Is this part available in the US?
Not sure, sorry.
I don't even know what they would be called over there. I just searched Lowes for "mechanical boss" and it showed Bidets 🤔
Does anybody know can these be used on Square rain water down pipes
No, I'm afraid the flange is rounded to suit a 4 inch round pipe.
@@ultimatehandyman Thanks for the reply. Wanted to tap into a square drainpipe for drain for a condensing boiler.
@@rogerarcher4271 Just found this- www.phamnews.co.uk/heavy-rain-a-threat-to-condensing-boilers/
But you have to be sure that the condensate does not go into a rainwater only pipe (if it's a combined foul and rainwater property, the condensate will go to the sewer)
@@ultimatehandyman thanks again plan b now.
Ah Apologies I have just found the other video, I can't understsnd why you you would not put this whole subject into one video.
Because people search for different things.
Someone searching for "how to install a mechanical boss" will want to watch that video and someone searching for "how to cut a hole in cast iron" will find the other video.
Thanks for the comments
McAlpine are the best.
👍
Cool
Thanks for the comment
Are they allowed in the US?
I'm not sure, sorry.
They are widely used in the UK, for connecting to old cast iron soil stacks etc.
Thanks for the comment 👍
Ultimate Handyman it looks like a fantastic solution
Would I need to glue the mechanical boss to the pipe? What would I use? I'm a complete novice.
No, when you tighten it using the special tool, it expands a rubber bung on the inside and that holds it in place. I'm sure someone posted in the comments saying that they used silicone on the bit that fits flush with the pipe, you can do that if you like- but it will be fine without any glue/silicone etc.
Is it me or was the drill at a wonky angle?
Yes, it was a bit wonky (I was stood on steps and trying to ensure the camera was pointing at the right area).
Thanks for the comment
@@ultimatehandyman I wasn't hating. I was just commenting really. I did subscribe to yours and enjoy watching your videos. I hope you're not mad with me. Lol.
I know that LOL
Thanks for the comment
Was the name copied off of Genovas tee and y boss
I have no idea why the manufacturers call it what they call it
Thanks for the comment 👍
It would have been equaly useful to have shown us how to drill/cut the hole in the stack and with what hole saw and auger to use - as usual just show the easy bits - I dare you to add a video onto this of how to drill/cut the hole - I bet you don't.
That video was done first.
NW is a a idiot
It will leak mine did and come detached from the soil stack
Useless product avoid !!
It must have been installed incorrectly, I have never known one to leak 😉
Personally I think this is a load of baloney. I've just tried, with a new DeWalt metal bit to drill a pilot hole in my cast iron downpipe. After 8 minutes there's the slight beginning of a hole - a depression, nothing more. Tried a different bit, no difference, so I don't see for a minute how a Starrett holesay, which I bought for the job, is going to drill a 57mm hole. Absolute twaddle.
You really think I would fake a video about drilling into a cast iron soil pipe 😂
Any Bi-Metal hole saw will drill
Through a cast iron pipe, done it plenty of times. Get your yourself a new drill bit bud.
1st
2nd 😉