Home |
Search |
Today's Posts |
|
UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
I have just put in some plumbing, one part of which is a compression
joint to 22mm pipe, that screws straight into a 3/4" brass fitting. This screw in joint is weeping very very slightly. The easy way out is to unscrew the compression joint, and then re-do the screw in bit with more PTFE tape..and then re-screw the compression joint.. I never like re-screwing up a compression joint though, although this one is not totally rammed home. To remake the pipe that goes into the compression joint is flipping awkward, so I am inclined to take the risk as a shot to nothing really.. What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? |
#2
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
The Natural Philosopher wrote: I have just put in some plumbing, one part of which is a compression joint to 22mm pipe, that screws straight into a 3/4" brass fitting. This screw in joint is weeping very very slightly. The easy way out is to unscrew the compression joint, and then re-do the screw in bit with more PTFE tape..and then re-screw the compression joint.. I never like re-screwing up a compression joint though, although this one is not totally rammed home. To remake the pipe that goes into the compression joint is flipping awkward, so I am inclined to take the risk as a shot to nothing really.. What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? Personally, I would re-use it, but using a bit of Plumber's Mait compound |
#3
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Homer2911 wrote:
The Natural Philosopher wrote: I have just put in some plumbing, one part of which is a compression joint to 22mm pipe, that screws straight into a 3/4" brass fitting. This screw in joint is weeping very very slightly. The easy way out is to unscrew the compression joint, and then re-do the screw in bit with more PTFE tape..and then re-screw the compression joint.. I never like re-screwing up a compression joint though, although this one is not totally rammed home. To remake the pipe that goes into the compression joint is flipping awkward, so I am inclined to take the risk as a shot to nothing really.. What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? Personally, I would re-use it, but using a bit of Plumber's Mait compound I just did, just more tape on the screw joint, and re-tightened the compression.it had a little bit left..so far...so good. Gulp. I hate leaks.. ALL the solder joints I worried about were fine. Just one lousy packed thread. |
#4
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
The Natural Philosopher wrote:
Personally, I would re-use it, but using a bit of Plumber's Mait compound I just did, just more tape on the screw joint, and re-tightened the compression.it had a little bit left..so far...so good. Tape on the thread? :¬( The water shouldn't be getting anywhere near the thread. A few winds around the olive/pipe or some other form of flexible sealant would have been a better solution. -- http://gymratz.co.uk - Best Gym Equipment & Bodybuilding Supplements UK. http://trade-price-supplements.co.uk - TRADE PRICED SUPPLEMENTS for ALL! http://fitness-equipment-uk.com - UK's No.1 Fitness Equipment Suppliers. http://Water-Rower.co.uk - Worlds best prices on the Worlds best Rower. |
#5
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Pet @ www.gymratz.co.uk ;¬) wrote:
The Natural Philosopher wrote: Personally, I would re-use it, but using a bit of Plumber's Mait compound I just did, just more tape on the screw joint, and re-tightened the compression.it had a little bit left..so far...so good. Tape on the thread? On the other half of the joint. Screw joint. I had to undo the COMPRESSION joint to remove the screw joint. Have a look here http://www.discountedheating.co.uk/s..._Fittings.html Product code 555031. And all will become clear.. :¬( The water shouldn't be getting anywhere near the thread. A few winds around the olive/pipe or some other form of flexible sealant would have been a better solution. Again, haven't read what I wrote properly. |
#6
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
On Wed, 12 Apr 2006 10:59:57 +0100, The Natural Philosopher wrote:
The easy way out is to unscrew the compression joint, and then re-do the screw in bit with more PTFE tape..and then re-screw the compression joint.. PTFE tape is not for compression joints. Use Boss White. -- Nigel M |
#7
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Nigel Molesworth wrote:
On Wed, 12 Apr 2006 10:59:57 +0100, The Natural Philosopher wrote: The easy way out is to unscrew the compression joint, and then re-do the screw in bit with more PTFE tape..and then re-screw the compression joint.. PTFE tape is not for compression joints. Use Boss White. No, the PFTE was on the screw in part - not the compression joint. The whole assy was to go between 22mm copper and 3/4 thread..the only thing I could find was a 3/4" screw to 22mm compression fitting. It was the screw in bit that was weeping. |
#8
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
No, the PFTE was on the screw in part - not the compression joint.
The whole assy was to go between 22mm copper and 3/4 thread..the only thing I could find was a 3/4" screw to 22mm compression fitting. You make it sound like it wasn't the perfect fitting for the job! Christian. |
#9
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Christian McArdle wrote:
No, the PFTE was on the screw in part - not the compression joint. The whole assy was to go between 22mm copper and 3/4 thread..the only thing I could find was a 3/4" screw to 22mm compression fitting. You make it sound like it wasn't the perfect fitting for the job! Christian. Oh..well yes..it is a three hole wall tap..bought it online, and got two taps, and a spout. All had 3/4" screw fittings. No explicit way to mount the taps, except a large threaded section to which I could find no nuts. No explicit way to connect the tap outputs to the spout. In the end I soldered up a 22mm T section, and put 22mm compression to 3/4" threaded sections - 5 in all - on all the threaded bits, did it up tight and wedged it in a notched stud. And screwed a bit of 15mm ply over that to hold it down. Then a further bit of MDF wedged under a noggin with a hole in it to take the other side tap pushed it horizontal, and provided a spacer..and a sheet of 22mm chip of dubious parentage with three holes in it was screwed over the lot... and extended as far as needs be along where the bath will go. Screw the bath to that later, and tile up the lot..after skimming a bit to get the wall FLAT which it ain't. Grr. Must remember to line the bath up with the floor tile line... SHE wanted 'taps in the wall please' I didn't even get a blow job. |
#10
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
The Natural Philosopher wrote:
snip SHE wanted 'taps in the wall please' I didn't even get a blow job. /me resists the temptation to suggest DIY, or getting a professional in. |
#11
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
On Wed, 12 Apr 2006 20:20:41 +0100, The Natural Philosopher wrote:
I didn't even get a blow job. No blow job, no taps. -- Nigel M |
#12
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember The Natural Philosopher saying something like: SHE wanted 'taps in the wall please' I didn't even get a blow job. You got a drip, though. -- Dave |
#13
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Nigel Molesworth wrote:
PTFE tape is not for compression joints. Use Boss White. -- Nigel M Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html |
#14
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Bookworm wrote:
Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. When is tape or anything else needed for compression joints? The joint is watertight metal on metal. |
#15
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
"Chris Bacon" wrote in message ... Bookworm wrote: Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. When is tape or anything else needed for compression joints? The joint is watertight metal on metal. In theory you are right. In practice a smear of jointing paste is needed to fill in any imperfections in the olive, fitting and pipe. |
#16
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Chris Bacon wrote:
Bookworm wrote: Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. When is tape or anything else needed for compression joints? The joint is watertight metal on metal. Sigh. How many times do I have to repeat that the original question was not about using tape on compression joints, but on a screw thread joint, the undoing of which also required a compression joint to be unscrewed? However, I have had to use sealer on compression joints before now. 10mm oil pipe mainly. The pipe is so soft the olives don't make a good seal to it. |
#17
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
"Bookworm" wrote in message ups.com... Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. -- Nigel M Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html He is right. PTFE should not be used on brass compression joints. There are potable version of jointing paste. This should be used and only a smear between the body of the fitting and the olive.. Do you put PTFE on the threads of a compression joint? |
#18
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Doctor Drivel wrote: "Bookworm" wrote in message ups.com... Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. -- Nigel M Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html He is right. PTFE should not be used on brass compression joints. There are potable version of jointing paste. This should be used and only a smear between the body of the fitting and the olive.. Do you put PTFE on the threads of a compression joint? Why shouldn't PTFE tape be put on compression joints ? If I've got any concerns about one, I put a couple of wrpas round the nose of the pipe such that it just covers the olive. And as for the tosh about work hardening !!! Once the olive has been compressed onto the pipe' it's not going to change in dimension again - the metal to metal seal has been made and the seal thereafter is between the olive and the fitting, which might require some assistance in the form of PTFE or paste. I've never had any problem with re-suing compression fittings - in fact I'm mean enough that I've recycled various bits of off-cuts that have olives on them and never had a problem. Rob |
#19
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
"robgraham" wrote in message ups.com... Doctor Drivel wrote: "Bookworm" wrote in message ups.com... Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. -- Nigel M Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html He is right. PTFE should not be used on brass compression joints. There are potable version of jointing paste. This should be used and only a smear between the body of the fitting and the olive.. Do you put PTFE on the threads of a compression joint? Why shouldn't PTFE tape be put on compression joints ? It is not designed for it. It is designed to be wrapped on threads. Some plastic pipe makers stipulate that PTFE is wrapped around a metal olive when using brass compression joints with plastic pipe. That is the only case of wrapping an olive with PTFE that I know of, and I am doubtful if that really adds anything at all. If I've got any concerns about one, I put a couple of wrpas round the nose of the pipe such that it just covers the olive. Use jointing paste. And as for the tosh about work hardening !!! I never said anything about work hardening. |
#20
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
PTFE tape is not for compression joints. Use Boss White.
Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html Somewhat unnecessarily, though! You're right about Boss White, though. Should only be used on heating primary circuits, really. Christian. |
#21
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
In message . com,
Bookworm writes Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. -- Nigel M Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html True, but Boss Green is/does. -- Chris French |
#22
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
On Thu, 13 Apr 2006 23:12:07 +0100, chris French
wrote: In message . com, Bookworm writes Nigel Molesworth wrote: PTFE tape is not for compression joints. Use Boss White. -- Nigel M Wrong. Been using PTFE tape on Compression Joints (where needed) for 30 years. Boss White is not suitable for potable water. Must conform to BS 6920, it doesnt. see www.tool-up.co.uk/shop/diy/MISBW.html True, but Boss Green is/does. As does Boss Blue I believe . Stuart |
#23
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
What are your experiences of unscrewing a 22mm compression joint and
then re-using it without a new olive?? I've done it loads of times. It certainly wouldn't even occur to me to even change the olive, let alone the entire fitting. I never use any jointing compound or PTFE on compression joints. Christian. |
#24
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Christian McArdle wrote:
What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? I've done it loads of times. It certainly wouldn't even occur to me to even change the olive, let alone the entire fitting. I never use any jointing compound or PTFE on compression joints. One problem with this is you don't know how many times this has been done. The olive will work harden sooner or later, and stop working so well. |
#25
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Ian Stirling wrote:
Christian McArdle wrote: What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? I've done it loads of times. It certainly wouldn't even occur to me to even change the olive, let alone the entire fitting. I never use any jointing compound or PTFE on compression joints. One problem with this is you don't know how many times this has been done. I do. I did it yesterday for the first time. The olive will work harden sooner or later, and stop working so well. Yup. I don't like reusing old ones, but this was brand new. Whole new pipework, bugger of a job, and then one screw joint leaked a teeny bit..and it would be buried in the wall. Anyway it IS buried in the wall now, and I hope I never have to see it again. There is a huge dichotomy between neat trim bathrooms and accessible plumbing. My feeling is that as long as it all lasts longer than HER desire for another complete makeover (10-15 years) that's good enough for me.. |
#26
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Ian Stirling wrote:
Christian McArdle wrote: Someone else wrote, but the attributions were munged: What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? I've done it loads of times. It certainly wouldn't even occur to me to even change the olive, let alone the entire fitting. I never use any jointing compound or PTFE on compression joints. The olive will work harden sooner or later, and stop working so well. It's a metal-on-metal joint, which should be watertight. After the initial deformation it should not be necessary to swing on the spanner when doing the joint up. You can't make a watertight joint more watertight. |
#27
Posted to uk.d-i-y
|
|||
|
|||
Reusing a compression joint..?
Christian McArdle wrote:
What are your experiences of unscrewing a 22mm compression joint and then re-using it without a new olive?? I've done it loads of times. It certainly wouldn't even occur to me to even change the olive, let alone the entire fitting. I never use any jointing compound or PTFE on compression joints. Christian. Good. Anyway it worked. There is confusion. The PTFE was not on the compression joint - there was a threaded joint as well. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Help please with joint naming | Woodworking | |||
Plumbing compression joint | UK diy | |||
v simple q: will a compression joint handle mains pressure? | UK diy | |||
Compression joint leaking | UK diy | |||
Slow leak on compression joint - can't access stop cock | UK diy |