Advanced Plumbing: Mixing Metric and Imperial

[Morakot]

So I bought a wall hung toilet, but discovered that the supplied fitting is metric!

 

The L-shape fitting is supposed to slide over a 100 mm metric drain pipe while connecting the toilet bowl on the other side. However in this bathroom, a standard 4-inch blue PVC pipe is installed that connects to the sewer; this is obviously to big to fit with the black PVC piece.

 

What to do? Does anyone have an idea?

 

 

 

[Artisi]

Are you saying the 4" blue is too big? 

[Morakot]

Looking at the instruction, it appears that the L-shaped outlet pipe is probably connected with a coupler to the  drain pipe. A 4-inch coupler doesn't fit though. It's too wide.

 

 

Edited November 5, 2019 by Morakot

[Morakot]

7 minutes ago, Artisi said:

Are you saying the 4" blue is too big? 

The blue pipe does neither fit over the black piece nor inside.

 

A 4-inch coupler is too wide.

Edited November 5, 2019 by Morakot

[maxpower]

Gently heat the end of a piece of blue Thai UPVC pipe until soft to make a custom adaptor. 

 

Or use a 100mm - 100mm rubber coupler and clips.

Edited November 5, 2019 by maxpower

[sometimewoodworker]

1 hour ago, Morakot said:

The blue pipe does neither fit over the black piece nor inside.

 

A 4-inch coupler is too wide.

If you have a heat gun it’s not a difficult job to reduce the size of a section of blue PVC pipe. You may have to try it more than once to get it correct, though if you use 3 or 4 jubilee clips to squeeze the blue pipe down you may even get it right first time. You may find that being an ambidextrous monkey is useful ???? 

[steve187]

 

What you need is one of these, but not sure if in Thailand available in Singapore - https://steldor.com/plumbing/multikwik-mk-s2.html

Edited November 6, 2019 by steve187

[Morakot]

10 hours ago, maxpower said:

Or use a 100mm - 100mm rubber coupler and clips.

 

Thanks! Yes that sounds probably the best. Something like the one in the photo.

 

 

[Morakot]

10 hours ago, sometimewoodworker said:

If you have a heat gun it’s not a difficult job to reduce the size of a section of blue PVC pipe. You may have to try it more than once to get it correct, though if you use 3 or 4 jubilee clips to squeeze the blue pipe down you may even get it right first time. You may find that being an ambidextrous monkey is useful ???? 

 

On a different project, I tried using a heat gun with these blue pipes before. The results varied: for 2" pipes it worked, for 4" the results were disastrous.

[Morakot]

26 minutes ago, steve187 said:

 

What you need is one of these, but not sure if in Thailand available in Singapore - https://steldor.com/plumbing/multikwik-mk-s2.html

 

This looks interesting. But doesn't this connect to the toilet bowl?

[robblok]

I can't help you but my dad is here and we had to do some plumbing as the pipes in the wal !!!! sprong a leak. The Thais who originally made it used sub standard materials and it just would not hold.

 

Only solution was to redo it and break up part of the wall (hated that) but even then many of the available pipes and connectors were substandard. Just a bit to wide and even in a batch of the same connectors there were differences.

 

I can only say plumbing is real frustrating in this country because of the <deleted> they sell. (been to Home-pro / Thaiwatsadu and local suppliers) Good quality that fits good is hard to find. 

 

Finally its now fixed.. but it took far longer then it should have.

Edited November 6, 2019 by robblok

[Morakot]

13 minutes ago, robblok said:

I can't help you but my dad is here and we had to do some plumbing as the pipes in the wal !!!! sprong a leak. The Thais who originally made it used sub standard materials and it just would not hold.

 

Only solution was to redo it and break up part of the wall (hated that) but even then many of the available pipes and connectors were substandard. Just a bit to wide and even in a batch of the same connectors there were differences.

 

I can only say plumbing is real frustrating in this country because of the <deleted> they sell. (been to Home-pro / Thaiwatsadu and local suppliers) Good quality that fits good is hard to find. 

 

Finally its now fixed.. but it took far longer then it should have.

 

I've worked with the locally available blue UPVC material before. It's okay if it's done properly.

 

Had to deal with "Cowboy" installation too that were done by clueless monkeys who worked for the proverbial peanuts. I can understand the frustration @robblok!

Edited November 6, 2019 by Morakot

[robblok]

9 minutes ago, Morakot said:

 

I've worked with the locally available blue UPVC material before. It's okay if it's done properly.

 

Had to deal with "Cowboy" installation too that were done by clueless monkeys who worked for the proverbial peanuts. I can understand the frustration @robblok!

Yes those cowboys go for the cheapest fastest fix (that was what we had to replace) Meant a lot of breaking open of the wall. But even then the material at hand did not fit always as good as it should be. Even between same units in the batch there were minor size differences.

 

Anyway.. finally (today after 3 days) the leaking is fixed. 

 

Really not one of my favorite things to fix and I was so affraid to get a local to do it that i waited for dad. They want to go fast even if you pay more and tell them to do it slow careful and with the best stuff available. 

[Artisi]

Morakot:  just be a Thai plumber for 10 minutes, fill the gap with silicone, easy, secure, and solves your problem. 

[Bassosa]

My plumber has attached the P-trap under the sink to the blue PVC drain pipe with something that can be best described as grey cement.

 

Is this commonly done in Thailand and how bad is it?

Edited November 6, 2019 by Bassosa

[Morakot]

31 minutes ago, Artisi said:

Morakot:  just be a Thai plumber for 10 minutes, fill the gap with silicone, easy, secure, and solves your problem. 

 

I think you discovered my limitation... ????

 

Actually if going done this road, wouldn't be plastic welding rods (PVC) a better option?

 

https://www.ebay.com/itm/50pcs-Set-Plastic-Welding-Rods-ABS-PP-PVC-PE-Welding-Sticks-For-Plastic-Welder/292501782466

[Morakot]

28 minutes ago, Bassosa said:

My plumber has attached the P-trap under the sink to the blue PVC drain pipe with something that can be best described as grey cement.

 

Is this commonly done in Thailand and how bad is it?

 

Not uncommon, but no good at all.

[transam]

There probably is something out there to do the job properly, but finding it...Hmmmmm.

Looking at your problem, I would sand paper and clean both surfaces, then use a quality silicone sealant, pushed well down into the joint.....????‍♂️

[houyuexin]

you can use reducer coupling

[farmerjo]

Wrap tape around pipe till the desired size then use epoxy glue.

[Morakot]

7 hours ago, transam said:

There probably is something out there to do the job properly, but finding it...Hmmmmm.

Looking at your problem, I would sand paper and clean both surfaces, then use a quality silicone sealant, pushed well down into the joint.....????‍♂️

 

Thanks @transam ???? I probably would do what you suggest if this were in an accessible place. But since this will be closed off and tiled over, I'll go for a proper coupling.

[Artisi]

17 hours ago, Morakot said:

 

Thanks @transam ???? I probably would do what you suggest if this were in an accessible place. But since this will be closed off and tiled over, I'll go for a proper coupling.

If you can position it accurately in the correct spot before closing it off and tiling over and offering the pan onto the discharge pipework, use some construction expoxy resin to bond it into the PVC pipe. Easy and permanent, done and dusted. 

Can't see what the fuss is about, if the black connector had of fitted into the 4"PVC, you would have simply stuck some PVC glue on it and got on with the job. 

Edited November 7, 2019 by Artisi

[paddypower]

off topic, but re: special purpose sealants. The metal peak of my roof has beeen exposed in parts, by an over enthusiatic worker doing some rooof paint prep. .the advice i got is buy a sanitary silicon sealant, which will stay flexible, e.g. Sikasil Kitchen & Bathroom. Not available at Home Pro. does anyone have alternative suggested products commonly avalable? I have silicon tubes at home. but I know i need a flexible product due to metal expansion/contraction in this climate.

tia

[sometimewoodworker]

1 hour ago, paddypower said:

off topic, but re: special purpose sealants. The metal peak of my roof has beeen exposed in parts, by an over enthusiatic worker doing some rooof paint prep. .the advice i got is buy a sanitary silicon sealant, which will stay flexible, e.g. Sikasil Kitchen & Bathroom. Not available at Home Pro. does anyone have alternative suggested products commonly avalable? I have silicon tubes at home. but I know i need a flexible product due to metal expansion/contraction in this climate.

tia

This one will do the job

[paddypower]

On 11/13/2019 at 2:09 PM, sometimewoodworker said:

This one will do the job

thanks. I picked up another silicone brand at home pro Surat, yesterday. buy 6 get 6 free.

Edited November 16, 2019 by paddypower

[sometimewoodworker]

3 hours ago, paddypower said:

thanks. I picked up another silicone brand at home pro Surat, yesterday. buy 6 get 6 free.

That’s better than my place as it’s buy one get one