Tap Connectors Fibre Washers always leak eventually?

Having just fit some yesterday and having the same problem I find jointing paste smeared over the thread a minor miracle (I couldn't fit PTFE since the [bath] taps were within a bloody cm of the wall).

To be fair I have never had one develop a leak if it did not leak to start with...

That could be the difference. I do them up tighter than that.

Strange, as the thread is not part of the water seal on a tap connector. If you put it on the washer, I might understand it.

Putting it on the thread may lubricate it enough such that it will do up that bit tighter with the same amount of torque.

Use some Fernox silicone sealant. Brilliant stuff - although not cheap.

Hmmm Nope, still drip free. Maybe you're right, and its the re-tightening that's cured the problem?

So what is "Threadseal", "Sealing compound for watertight and gas tight thread connections" for?, is this type of product (PTFE tape, included) just for compression fittings? Do the flexible, braided tap connectors rely soley on the fibre/rubber washer?

From the fact that this is happening to a lot of your taps I'd say you have fitted them badly somehow.

There are -or were last time I replaced some, two different types of washer. one is for the hot tap and the other for the cold. And there are a variety of sizes too.

What causes replacement washers to fail soon after fitting is worn old taps wearing out the surface. They do suffer erosion over many years and even brass can have a very sharp edge in those circumstances.

What can do it to taps just a few years old is detritus in the water. Such regions are fairly rare these days.

Its for improving the sealing of connections that need the seal to operate on the thread itself. Typically malleable iron connections, taper fit BSP threaded connections (like many gas fittings) etc.

From a sealing point of view, there is no need for such things on compression fittings that seal with an olive, but there is a secondary benefit in that it lubricates the threads making it easier to do up (and dismantle later). That in turn gives you more compressive force on the olive and less wasted on overcoming friction in the threads.

Tap connections in general rely on a washer compressed with enough force to make a seal. The choice of fibre is ideal since it will expand slightly when wet and hence have a tendency to self heal any minor leaks. Also the washers don't perish.

Or PlumbaJoint, which is also silicone.

| | Tap Connectors Fibre washers | | Problem always leak eventually?

Yes! tap washers IME have a life of several years, whereas taps have a life of tens of years.

They work just fine. You need to nip them up more.

Christian.

There seems to be a bit of confusion here - I get the feeling some are talking abut tap washers (i.e. that go inside taps to arrest the flow of water) rather than the tap *connector* washers we started talking about.

For the avoidance of doubt, I was talking about tap connector washers.

Christian.

I Know this could be dangerous as I do not have the rest of the thread but....

If the pipe connections are not being strained/twisted when screwing up the joint then these washers should be OK and last along time. I tend to try and solder the last joint with the pipe in position so this is avoided. If this is too difficult and you don't want to re-plumb, you can get away with fitting a suitable rubber ring in place of the fibre washer and some Furnox silicone. Apologies if this has been covered but I have had some problems with these joints especially on bottom high pressure feeds to toilets!!