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[Gaffers]

Resin or stone composite?

Assuming resin

Forstner bit or flat bit

If its stone then it will need a carbide tipped drill bit

I'm not sure about that.

Stone effect, so no worries.  A normal holesaw will do

[Kate]

Resin or stone composite?

Assuming resin

Forstner bit or flat bit

If its stone then it will need a carbide tipped drill bit

I'm not sure about that.

Stone effect, so no worries.  A normal holesaw will do

Thanks Matt.

I'm going to install it tomorrow. Hopefully I won't have any problems.

By the way, do compression fittings need anything extra to stop them leaking? I didn't think they did?

[Entwood]

Resin or stone composite?

Assuming resin

Forstner bit or flat bit

If its stone then it will need a carbide tipped drill bit

I'm not sure about that.

Stone effect, so no worries.  A normal holesaw will do

Thanks Matt.

I'm going to install it tomorrow. Hopefully I won't have any problems.

By the way, do compression fittings need anything extra to stop them leaking? I didn't think they did?

It doesn't do any harm to wrap a little PTFE tape around, but a good clean olive on a new piece of pipe should not leak.. 

[Kate]

Resin or stone composite?

Assuming resin

Forstner bit or flat bit

If its stone then it will need a carbide tipped drill bit

I'm not sure about that.

Stone effect, so no worries.  A normal holesaw will do

Thanks Matt.

I'm going to install it tomorrow. Hopefully I won't have any problems.

By the way, do compression fittings need anything extra to stop them leaking? I didn't think they did?

It doesn't do any harm to wrap a little PTFE tape around, but a good clean olive on a new piece of pipe should not leak.. 

Would plumbers putty do?

[martin42]

You need to use boss white,available from d.i.y places,dont use plumbers mate,

[Bigron]

Agreed, I would use Boss White, mainly because I always seem to get PTFE tape everywhere except in the threads it is meant to go in.
Is that just me?

Ron.

[dbug]

My mates a plumber - he just wipes a dab of clear silicon sealer round the threads/olive and tightens as normal

[Kate]

What is Boss White?

[dbug]

What is Boss White?

Its an "old fashioned" sealer/jointing compound, which sets and hardens with time.

[Vamps]

What is Boss White?

A Man.......................

[Phil]

Compression fittings DO NOT need anything around them, thats the point of using compression!

The only reason people do put 'extra' sealing around them is because they are poor tradesperson. If a professional plumber came in my house and started globbing gear around compression fittings they would be out the door!

Would also double check as some paste is not suitable for drinking water use - Boss white being one of them!!!

De-burr the pipe, push it right home, tighten it right up and it will be fine, Ive never had issues with compression fittings and I'm no plumber

To be honest you might as well use push fit, even if you have copper pipe. If you want the copper look you can get copper 'effect' push fit fittings

[Marks DTM Calib]

My mates a plumber - he just wipes a dab of clear silicon sealer round the threads/olive and tightens as normal

Thats a bloody stupid thing to do as silicon and the acetic acid in the sealer reacts with copper!

[Stemo]

The whole idea of compression fittings is that you don't need to use any sealant. As long as you don't cross thread and don't under/over tighten they are fine. Capillary fittings are more fiddly, but fine with a bit of experience (and a lot cheaper). The only problem with them is that if you fill the system and find a leak, it's a bloody nuisance cause the pipes are full of water and you can't re-solder till you've drained down or isolated part of it. Push fittings....I hate them. Always managed to get a leak with them buggers.

[jonathanh]

back to the sink question

turn it over, it probaby has a knock out piece for the tap punch it out and you've got the hole you want ( I've fitted loads of franke fragranite sinks like that)

and agree with the previous - compression fittings - just work - no sealant or stuff like that.  I've NEVER used PTFE or Boss white.

Depends on what you are doing - if loads of plumbing, I'd use JG speedfit - just easier and faster.  But there is nothing difficult with solder ring or end feed stuff

Also I tend to get most stuff from toolstation - ten quid and they'll deliver

[Marks DTM Calib]

Push fit is a time bomb.....the seals age and then when you disturb it......drip....drip.....drip.....