Fixing a half installed outdoor tap kit

[martinfd]

Hello,

I'm trying to help someone with an outdoor tap kit they've bought from B&Q that they've half installed. I'm not all that experienced with plumbing but apparently I know more than them! The outdoor tap has a hose leading to a plastic female connector, as far as I can tell it's 3/4" (I'm rubbish at measuring these things and they've thrown the box with the instructions). It fitted nicely onto a spare hot water washing machine valve that was nearby which from memory are usually 3/4"?. A shame it was hot and not cold!

(I can't get the images to rotate the right way unfortunately, I've tried uploading twice, I'm blaming my phone).


They were replacing an old outdoor tap, which was connected to this stopcock valve. Again, as far as I can tell, a standard 15mm fitting (you can see the spare washing machine valve here which fitted the hose connector).

Any advice on the best way to get these to join? Can I get a coupler with a male end for the 3/4" hose connector, and a 15mm olive nut fitting on the other side? I'm struggling to pick out the right bit. Is it worth wrapping tape around both ends as well? I'm not sure I trust the plastic hose connector!

Thanks.

 

[TeaTime]

http://www.screwfix.com/p/male-coupler-15mm-x/82086

 

[martinfd]

Thank you for the very quick reply!

 

[TeaTime]

If there is a straight length of pipework to go off, then this will be the trick to go from 15mm pipe to 3/4" male.

Although, those tap kits are carp.

Remember, you need to install a double check valve on the pipe run, before the pipe exits the building to the outdoor tap.

an outdoor tap with a built in double check valve is not sufficient to meet water regs.

 

[martinfd]

There isn't a length of pipe to work off, I was hoping to connect the coupler directly to the stopcock you see in the third photo, with the hose to the tap connecting directly into the coupler as well. Will that not work?

I have a few spare bits lying around.. There's a spare short length of 15mm pipe with a nut and olive at one end that looks like it came off the stopcock to begin with. Plastic pushfit(?) on the other end (photo below).

No double check valve, so that will need to be added. Any chance I can get one that will fit as a coupler between the stopcock and the hose connector?

 

[martinfd]

This, with a short length of pipe between it and the stopcock?

http://www.screwfix.com/p/15mm-x-washing-machine-valve-with-check-valve/27660

Stopcock - 15mm pipe - check valve - hose

 

[TeaTime]

That is not a double check valve!

Let me see if I can imagine whats going on there: -

You have a stop cock (a gate valve) that has a male 3/4" BSPP thread on it that is currently fitted internally. This supplies the tap with water and nothing else?

You want to use the tap kit, which most of it you have deemed useless since you have a supply to go from (the gate valve).

If you connected from the gate valve with the 3/4" to 15mm to a stub piece of pipe, you will then be able to go from that to the double check valve, onto another stub piece of pipe. from there you will want to have the 15mm compression to male 3/4" thread and attach the hose.

I assume you know what you are doing from there?

All together though, this is an absolute lash up and should be done all in copper to a wall plate elbow. From there you can connect what you desire.

 

[TeaTime]

That is not a double check valve!

Let me see if I can imagine whats going on there: -

You have a stop cock (a gate valve) that has a male 1/2" BSPP thread on it that is currently fitted internally. This supplies the tap with water and nothing else?

You want to use the tap kit, which most of it you have deemed useless since you have a supply to go from (the gate valve).

If you connected from the gate valve with the 1/2" to 15mm to a stub piece of pipe, you will then be able to go from that to the double check valve, onto another stub piece of pipe. from there you will want to have the 15mm compression to male 3/4" thread and attach the hose.

I assume you know what you are doing from there?

All together though, this is an absolute lash up and should be done all in copper to a wall plate elbow. From there you can connect what you desire.

 

[martinfd]

Yes, I appreciate this is a bit of a bodge.

The gate valve is inside, and only supplies the external tap. They've already fitted the external tap and fed the hose through.

What you've described is correct. I'll need another stub of pipe but otherwise that sounds good, thanks.

 

[TeaTime]

Depending on if the thread on the gate valve is 1/2" or 3/4", you will also need either this: -

http://www.screwfix.com/p/female-coupler-15mm-x/93992

or this

http://www.screwfix.com/p/female-coupler-15mm-x/38542

you will then be able to fit the double check valve, a stub piece of pipe, then you can add the 15mm to 3/4" male thread to attach the hose thread to.

Good luck, hope you manage to make it look half decent.

 

[martinfd]

Well, I did what I could, unfortunately the existing gate valve had a slight leak, but more important the hose connector from the tap kit was a little leaky as well, so I've abandoned this for now. I'll go at it with some copper pipe and do it properly another time