Compression Type A drain off and female 15mm coupler - Plumb Center

[M.Joshi]

I bought a compression (threaded) Type A drain off and female 15mm coupler from my local Plumb Center. The thread on the drain off is longer than the female coupler fitting so some of the thread shows when screwed fully on.

Is this normal?

 

[nysk2008]

Hiya, is iot not just a long tail fitting? TBH if its water tight and the cust happy then all good but to my knowledge you can get long and short tails both solder and screwed.

 

[Guest123]

It will not do any harm when screwed in tightly. Use about 15 wraps of tape and screw it up as much as possible, but with this amount of tape on the threads, you don't have to tighten it up to the last thread in the female coupler. Think "outside tap onto a wall plate" and you'll get the idea about screwing it on just enough to make it a nice tight fit.

The fittings combination you selected is a wee bit unusual, but will work just fine. I like the solder/compression version than the threaded one.

 

[M.Joshi]

Hi, it's a screw fitting. The thread looks looks longer than the ones I've seen pictured elsewhere?

The female coupler is this one:

Center compression female iron straight connector 15 x 1/2

The drain-off looks like this but has a longer thread:

http://www.professionalbuildingsupp...products_images_2610-1-4821_800_800_False.png

I didn't select them, it's what the chap at the counter gave me when I asked for a compression Type A drain off and female 15mm coupler. Initially, he gave me a non-threaded drain off but I said it was the wrong type and he then searched and found one with a thread. Where would you use the ones with a longer thread?

 

[mountainman]

Not another mammoth discussion thread about a really basic and obvious subject please!!!

 

[M.Joshi]

Not another mammoth discussion thread about a really basic and obvious subject please!!!

Are you a moderator to be passing such judgement?!

I'm sure there are other simple questions posted on here daily - why pick on this one?

I come on here to ask advice and share advice - not to be judged.

 

[nysk2008]

the fem and male thread r just different, personally i wouldnt worry bout it. different companies, different supplies, different length threads

 

[Guest123]

Absolutely nothing to worry about. Just use the thread tape in the way I described above. As I said, not the fittings combination I'd chose, but you've been given them at the counter and they will work just fine.

 

[Guest123]

For the next time this problem pops up, use one of these instead.......

 

[M.Joshi]

For the next time this problem pops up, use one of these instead.......

Hi system3, thanks. It's only at home - I'm not a plumber! Hopefully won't have to change one again! I purchased the screw thread type one as someone on here mentioned that the drain off can easily be changed in the future if it leaks. The female 15mm coupler can be left in place and the old drain off removed and a new one fitted in its place.

I suppose you could easily change the one you've posted too. I'm assuming you'd need a 15mm back-back threaded compression coupler instead?

 

[nysk2008]

agree with system. all you need mate is something to solder onto the male side i.e a coupling, elbow etc

 

[mountainman]

You've obviously forgotten that I gave you good advice during your 'filling loop' thread.
A guy learning is one thing but someone who professes to be electrically natured should know better.

 

[M.Joshi]

You've obviously forgotten that I gave you good advice during your 'filling loop' thread.
A guy learning is one thing but someone who professes to be electrically natured should know better.

Electrical and plumbing are two completely different subjects. Water and electricity don't mix too well! :wink_smile: Could you explain how I should know better if I am familiar with electrics? I agree both do involve some soldering, planning the layout of circuits/pipe runs but beyond that I think the commonality ends...?

 

[mountainman]

Consider an internal thread of 20mm depth having an external thread 25mm long screwed into it. Would you expect to see any thread exposed after unification?

Ps, why didn't you buy a 15mm compression coupling and a 15mm drain off cock instead of going from 15mm to BSP then from BSP to DOC? would have saved on PTFE

 

[M.Joshi]

Consider an internal thread of 20mm depth having an external thread 25mm long screwed into it. Would you expect to see any thread exposed after unification?

Ps, why didn't you buy a 15mm compression coupling and a 15mm drain off cock instead of going from 15mm to BSP then from BSP to DOC? would have saved on PTFE and hot air.

I'm not a 'sparkie' but familiar with electrics! I had seen the parts I wanted in a catalogue and presumed that if I went into the Plumb Center instead of Screw Fix and asked for the same parts, they would give me correct ones. It's only when I reached home and fitted them together that I realised that the thread was too long. I didn't know they came in different thread lengths.

My reason for choosing a female 15mm coupler is on recommendation from someone on another post - see my reply above. Basically, it allows the drain off to be changed easily in the future if necessary.

 

[mountainman]

May I suggest that instead of going to screwfix and plumb center you acquaint yourself with a proper plumbers shop.
They will advise you properly and more cheaply than the big boys.

 

[M.Joshi]

May I suggest that instead of going to screwfix and plumb center you acquaint yourself with a proper plumbers shop.
They will advise you properly and more cheaply than the big boys.

Local plumber's merchant was completely out of stock of Type A compression screw thread drain off's. So I had to go to Plumb Center!

 

[dontknowitall]

If you use a soldered fitting remove the insides first or you'll melt the washer!

 

[ecowarm]

If you require to change the drain off in the future, you could have used a 15mm ball-a-fix valve or iso valve and a 15mm drain off.

 

[M.Joshi]

If you require to change the drain off in the future, you could have used a 15mm ball-a-fix valve or iso valve and a 15mm drain off.

Thanks, it was suggested by another forum member that I use a ball valve attached to a hose-pipe type connector to achieve full flow however, due to the outside location, I decided against using a ball valve.

Edit: Just came across these outdoor ball valve taps. I may be able to use the one with the butterfly handle?

http://www.emmeti.co.uk/wp-content/...Ball-Valves-Outdoor-Lever-Ball-Valve-Taps.pdf

 

[REDSAW]

Thanks, it was suggested by another forum member that I use a ball valve attached to a hose-pipe type connector to achieve full flow however, due to the outside location, I decided against using a ball valve.

Edit: Just came across these outdoor ball valve taps. I may be able to use the one with the butterfly handle?

http://www.emmeti.co.uk/wp-content/...Ball-Valves-Outdoor-Lever-Ball-Valve-Taps.pdf

good choice.

i like to use the solder type d/cok into comp if doing it that way.