PTFE tape on compression fittings

Discussion in 'Plumbers' Talk' started by furious_customer, Jul 10, 2018.

  1. Heat

    Heat Well-Known Member

    The V2 Lube paste is non hardening. I guess other similar pastes are same.
    Boss White hardens with high heat and can cause problems if trying to slacken nuts after it had oozed into the threads.
     
  2. PhilSo

    PhilSo Active Member

    Shan't be using that then. :D
     
    Heat likes this.
  3. Heat

    Heat Well-Known Member

    That is exactly what you would want with a paste if it is used on compression joints, - to keep soft. Also good that none will ever be wasted as you won’t someday find the tub solid inside, like with Boss White. So you don’t want the hardening stuff usually, except male threads, rad valve tails etc on heating systems.
    Unless we are thinking of Viagra. :)
     
  4. PhilSo

    PhilSo Active Member

    Just a bit of limp humour. :p
     
    Heat likes this.
  5. PhilSo

    PhilSo Active Member

    How long before they have to change that name.

    :eek:
    PhilSo
     
    retiredsparks and Heat like this.
  6. Heat

    Heat Well-Known Member

    I thought that was likely.
    I think the new name is All Colour All Gender Boss Paste. :p
     
  7. ajohn

    ajohn Member

    The wiki isn't always right you know. This one is factual
    https://chestofbooks.com/crafts/machinery/Shop-Practice-V1/Hardening-And-Annealing-Brass.html
    or more detail
    https://www.highettmetal.com.au/blog/brass/how-to-temper-brass

    500C is just short of red and might be seen in a dark room or it might look grey. That gives the most ductile result but even higher temperatures will still anneal it, just results in larger crystals. That's what quenching fixes what ever state they are in. Small and even is best.

    Sadly maybe I was taught this sort of thing,

    John
    -
     
  8. retiredsparks

    retiredsparks Well-Known Member

    Oh and by the way, happy birthday Nikola.[/QUOTE]


    Many thanks. Where is my prezzi ?
    :)
    RS
     
  9. The Teach

    The Teach Well-Known Member

    Nothing wrong with adding extra (suitable) jointing products to create a 100% seal,different people prefer different products.
    It takes a little more time but if the compression joint is made so the olive is set into the pipe product and then undone a sealing product can we applied to the olive surface that comes into contact with the concave part of the fitting.

    Putting sealing product any where else is a waste of the product and looks very diy o_O.
    As mentioned by Heat in #15, quality of the fitting is an issue.There seems to be so many unbranded compression fittings on the market.Paying a little more has its advantages especially if compression's are in a non accessible area.

    compression fittings can be used on soft plastic pipe to plated metal pipes including galvanised.Copper is not so widely used in parts of mainland Europe,neither are unbranded compression fittings. choosing the correct products is the answer.

    Ptfe has its uses but now use loctite 55 cord or hemp & paste :D
     
    Last edited: Jul 11, 2018
    Heat likes this.
  10. ajohn

    ajohn Member

    LOL I have a big hunk of hemp. Bought a long time ago as old house and I might find some that needs replacing at some point. :( Not so sure I want to find any white lead based sealant to go with it though. I've heard from rather old people at the time that that is where the term boss white came from as the boss never developed a tan.

    John
    -
     
  11. retiredsparks

    retiredsparks Well-Known Member

    Boss is a trademark name...and I suspect made from chalk and liseed oil..as is putty.
    rs
     
  12. The Teach

    The Teach Well-Known Member

    Have used boss heating/plumbing goods for many years,there actually very good.Part of BSS and owned by travis perkins :(

    BOSS WHITE.jpg
     
  13. ajohn

    ajohn Member

    A local builders merchants was bought out by TP a while ago. Used to be a very busy place that kept all sorts of things. It's neither now.

    I'm fed up of opening a tin of jointing compound and finding it has gone solid. It's not something I use very often. Dampening it with water each time it's used helps. However I found a tub of Boss Super Green that states with ptfe. I must have bought it a long time ago and it's still soft. The price sticker has faded. It's reported as being useless in places but should be used with hemp or it's modern equivalent unless they are BSPT threads.

    Next time I open a tin and find it's gone solid I am going to switch to tape as per the gas people I had in. All they did was stretch 2 turns of it around the olive. No signs of it after the joint is made. Not the thicker gas approved tape - it's a pain to use. I think it's been introduced so that they can state use one turn - it's the law. That wont keep it in place on the thread - wouldn't for me on some air compressor fittings anyway. 3 turns of the usual stuff stretched on does. These were BSPT threads though. Parallel may need more.

    John
    -
     

Share This Page