blanking caps and blanking discs

Hello,

I see Tool station sell brass caps (39682) and blanking discs (22572). Why would you use these rather than a stop end?

Do you use the discs with the caps, or do you use the discs with a normal nut to blank off the nut?

Do you need to use fibre washers with either?

Sorry for all the questions, I've never seen/used either before.

Thanks, Stephen.

Reply to
Stephen
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Without seeing the images maybe they could be used temporarily ..for example .If you have fitted a T piece to a water supply but wanted to stop up two of the T's which would allow you to turn the water back on until you did something else ....fit the disc or cap to the unused legs of the T ? I remember using something similar a while back ..it consisted of a brass disc and a rubber disc which fitted inside the compression cap to blank it off ..It was in stu for years and worked fine.

Reply to
NOSPAMnet

Or you could use what plumbers have used for decades, IE a 1pfor 15mm and a

2p for 22m....I've seen these left in place for years without any problem.

AFAIK, the new coins are made of steel, but the old ones (pre-1990) were mostly copper and solder held on very well, and at 1-2p each were far cheaper.

Reply to
Phil L

A suitable coin and washer on a normal compression coupler works ok as a stopgap.

Reply to
Dave Plowman (News)

The caps fit gas taps when you take an appliance out.

Reply to
dennis

Stop end goes on a pipe, blanking disc goes on a compression fitting under the nut, cap goes straight onto a compression fitting.

The latter.

No.

Reply to
The Medway Handyman

Thank you. I am still a bit confused though. Say you want to blank a port on a tee, it seems you have two choices: cap or nut and disc. It seems there are two products that do the same job. Why not make just discs or just caps for this?

It seems to me that if you were going to blank a couple or an elbow, you may as well remove the fitting and replace with a stop end (or even remove the pipe completely).

These only seem to be of use with tees but then you could argue that a blanked tee could be replaced with an elbow or straight couple.

So I guess it is for temporary blanking? Like the other post said, to blank a gas pipe whilst you replace a fire or cooker or whatever?

I did buy a cap to blank the F/E and vent pipes when doing DIY power flushing but I found one leaked and required PTFE, that's why I wondered whether I should have used a washer. Perhaps it was just a dodgy fitting?

Thanks again.

Reply to
Stephen

If you want to blank off part of a Tee either temporarily or permanently you will already have the Tee's nut so all you need is the disc . You could have a situation where a pipe had a branch that was still in use but further along had a connection that was now redundant . In that case I would use a Stop End but some folk might prefer to use the existing fitting and insert a disc . It's really just one more option to suit the situation and you use whatever is most convenient for you.

Reply to
NOSPAMnet

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Stephen saying something like:

Keep a few of each rattling around in your toolbox just in case. In time to come you will discover them and not recall why you bought them.

Seriously - they are ultra handy for temporary or permanent blanking off, especially if you remove a pipe from a T and put a cap on - you might want to keep the removed pipe, complete with end for re-use, and a cap saves you having to cut the end of the pipe to retrieve the nut.

Blanking discs - for the same as above, where you have a spare nut available to convert into a cap; and stop ends come in to their own where there's a redundant pipe end that might be used in the future, or is just a total pita to remove.

Reply to
Grimly Curmudgeon

Thanks. I can see how caps and stop ends are useful. I have used stop ends in the past and just recently used caps. It's the discs I can't see any use for. As you say, you can't use the original nut because it's trapped behind the olive on the removed pipe. If you've got to go and buy something or fetch something from the toolbox then why not fetch a cap rather than a disc? It seems to me that there is nothing you can do with a disc that you can't do with a cap.

Reply to
Stephen

There is no "can't" about it . Uou "can" if you get the cap off or ,if the pipe has no fitting at the other end then it's simply a case of sliding it off. Anyway why get yourself in a faff about discs or caps .They both have their uses . get over it :-) .

Reply to
NOSPAMnet

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Stephen saying something like:

Plumbers generally have a box/bag full of nuts and rings and a handful of discs thrown in there means they don't need to worry about running out of caps. Of course, the cumulative savings of using a few discs instead of caps will add up, especially if the nut is the old one.

Reply to
Grimly Curmudgeon

Now I admit I have not been to a plumbers merchant, only Toolstation, but they only sell imperial size caps but metric discs. For 15mm it means there is a choice of either but for 22mm it has to be a disc. I don't know if caps and discs are available in greater ranges elsewhere but if not, perhaps that explains the mystery? One is imperial and one is metric. Anyway, like the other poster said, I've thought too much about it already ;)

Reply to
Stephen

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