10mm ID tubing to 6mm OD copper adaptor

[Nicknoxx]

As my project to auto-fill my coffe machine continues I've found a potable solenoid valve but it has a 10mm hose outlet and I'd like to use something like 6mm copper to carry the water into the reservoir as it will be visible. I can't find a connector (or series of connectors) which will do the job. Is there one (any)?

Thanks

[Andy Hall]

Yes there are.

You can look on the RS Components web site or that for Thorite. Both have compressed air fittings and adaptors that will do this.

RS have potable water tubing in plastic that would be a better bet than copper anyway.

[Nicknoxx]

Thanks. I hadn't thought of looking at compressed air fittings.

Better in what sense? I was planning to use small bore copper for aesthetic reasons.

[Andy Hall]

Flexible if you want to move the machine, disconnect and so on.

IIRC, RS have a range of potable water fittings as well as the tube, but you could reasonably use stainless steel compressed air fittings in

4 or 6mm. The tube diameter is not that important because you don't really need a high flow rate for this application.

There are fittings with an inbuilt stop valve which would be ideal as well.

[Nicknoxx]

Andy Hall wrote: snip

Ah, I see what you mean. I was planning to put the solenoid and transformer in a small ABS box and have a flexible hose to connect to the water supply so the 'gubbins' could remain in constant position in respect to the tank.

I have no experience of compressed air fittings, do they use olives like plumbing joints?

[Nicknoxx]

Andy Hall wrote: >snip

Is this the sort of thing you meant RS part no 460-7790 How does it connect to the copper?

Thanks

[Andy Hall]

The kind that I use, and which are quite common, have a push-in arrangement. Basically you cut the end of the tube neatly and push it into the fitting.

There are plastic fittings and stainless steel and they are good to 10 bar which is more than enough for this application.

Try going to rswww.com and putting "push-in" and "fittings" as key words and you will get about 1000 items in different sizes and types. Add "s/steel" as a third one and you'll get the stainless steel ones specifically.

I would be surprised if you didn't find all you need here. There are probably cheaper sources of fittings, but RS is convenient as a one stop shop for small quantities.

[John Stumbles]

BES do a 10mm x 6mm fitting reducer in end-feed (p/n 7179*) which you'd have to use with a 10mm coupler (6766) since they don't do 10 x 6mm directly in reducing couplings. Or you could go 10mm x 8mm coupling (7145) then 8mm x 6mm fitting reducer (7178).

• sit down with a cup of coffee with a nice slug of rum in it before looking at the price :-)

[John Stumbles]

Sorry: didn't read your post properly: if the solenoid wants 10mm o/d (compression?) the fitting reducer should work straight off. Still expensive though!