Basic fitting question - attaching/fixing toilet and basin

[dontknowitall]

I find if I don't silicone the wastes they leak.

Nice one Edwardk and at the risk of sounding patronising, well done for having a go. Looks good. I like to tighten all nuts by fingers/hand so I can ensure I'm not crossing the thread and also have put the two pipes together reasonably straight.

With your black nut, a ring of silicone all round it, hand tight to basin then I use pump pliers to tighten against basin, but not too tight as silicone, when dried, will make it water tight.

 

[PlumbBobBob]

i use pump pliers as well (they're not just for pumps!) to tighten waste bottom nuts

steve

 

[moony]

I find if I don't silicone the wastes they leak.

Nice one Edwardk and at the risk of sounding patronising, well done for having a go. Looks good. I like to tighten all nuts by fingers/hand so I can ensure I'm not crossing the thread and also have put the two pipes together reasonably straight.

With your black nut, a ring of silicone all round it, hand tight to basin then I use pump pliers to tighten against basin, but not too tight as silicone, when dried, will make it water tight.

me too matey, i just got slated for suggesting silicone on here a week or so ago....

 

[TC.]

me too matey, i just got slated for suggesting silicone on here a week or so ago....

Hi all, interesting read, just started my apprentiship, and my boss has had me building up bathroom sinks every morning before he fits it to the bathroom wall.

He requires me to insert silcone sealant in between the gap where the waste pipe/plug insert exits through the sink, and run a bead round the top. This is to act as a second safty seal against unwanted leaks should the rubber gasket which sits between the black nut and sink base fail.

I like this train of thought and not only does it prevent leaks it shows that you are taking care of the customers property by showing forethought.

 

[edwardk]

All fixed now and working - well I say working but as there isn't any mains yet at least when I pour a cup o' water down it heads down the drains rather than the cloakroom floor 🙂

Next job ... the dreaded upstairs bathroom. Will start a new thread for that as I'm bound to have questions and feckups...

Thanks for all your help - getting closer to finishing my 4 year build-a-house-in-evenings-and-weekends project 🙂
Ed

 

[dontknowitall]

Tip for you with bathroom ... take everything out then before tiling and fitting suite, paint ceiling and walls, window and door as it saves covering all the tiles and basin and things from splatter marks.

Still, should be a piece of cake for you now!

 

[kay-jay]

in general i also use silicon to bed wastes in. you don't get leaks this way and it can be touch and go without it.
i have found that if the washers and seals provided are more like plastic than rubber you definately have to use silicon. if the seals are a nice soft squishy and pliable rubber (usually higher end products, and usually white ish) then you don't need it.

KJ

 

[edwardk]

I used a bessey clamp to tighten the black plastic nut as it has straight/flat jaws - worked really well.

Forgot to check - do I need PTFE tape on the isolator valve compression fittings ? - so far just tightened them lightly with spanners and no tape.

Yes - the under sink washer was a hard translucent one rather than a squishy one so used silicon top and bottom.

 

[PlumbBobBob]

no you don't need ptfe on the isolators unless you overdo them and they start to leak then only around the olive

steve

 

[fuzzy]

Right - got a saddle/strap boss for a 110mm foul waste pipe. It slips over the 110mm pipe and has a boss for a 32mm basin waste to connect to it.

I'm ok with the basin waste connection - this looks like you just add solvent glue to the insert into the saddle, solvent glue into the insert for the basin waste and push the lot together.

What I need advice on is how to connect the saddle boss to the 110mm pipe.

It looks like it is a 56mm or 57mm hole that I need to drill into the 110mm and then slip the saddle boss over the top.
There isn't any o-ring so am I right in thinking that I just make sure the hole I drill is a good fit and put lots of solvent glue all over the hole area ? Do I also glue the rest of the saddle strap on ?

Thanks for any help - getting there !
Ed

drill a hole slightly larger than the raised edge on the inside of the boss, then solvent weld or silicone the boos into place

 

[fuzzy]

I used a bessey clamp to tighten the black plastic nut as it has straight/flat jaws - worked really well.

Forgot to check - do I need PTFE tape on the isolator valve compression fittings ? - so far just tightened them lightly with spanners and no tape.

Yes - the under sink washer was a hard translucent one rather than a squishy one so used silicon top and bottom.

you dont need ptfe on the thread of the compression fitting. you may need some on the olive if its tricky but most the time they are fine

 

[edwardk]

Many thanks - will check once the mains is connected - buckets til then... 🙁