Help! Tap tails to isolation valve.

[jrtrrror]

Hi. I am in the process of changing a sink unit.
You'll have to bear with me because I don't know all the precise terms.
I have the flexible hose that leads from the tap (I believe it's called a tap tail) and it connects to the msima via a nut. I wish to connect it to an isolation valve. However, when I remove the nilut and olive from the isolation valve I notice that the end of it is quite sharp. Should I use this, or is there an additional connector that is to be used.

Also there is an arrow on the valve. I presume to indicate flow direction. Does this need to point towards the taps?
If you were to use an isolation valve in the middle of a long run of pipe, how do you determine direct. Also, looking through one end of the pipe, there is acting of holes around the cenral bore, what are these for.

I'm am a complete novice so lots of info with no abreviabbrevi or assumption of parts is needed.

Many thanks.

 

[snowhead]

Tap Tail Adaptors 15mm x 1/2"

 

[Best]

Or use 15mm radiator valves tails if you have any spare.
Or use 1/2” x 15mm male straights tightened on to the pipe - that way you can have the isolating valves at any lower position convenient
Hope I am answering a genuine post?

 

[Welder]

+1 for snowheads suggestion.
In addition, fit full bore isolators NOT the ones you have. Those severely restrict flow to the tap.

 

[jrtrrror]

Hi. YorkshireDave. Thanks for the reply. How do you know which ones I've got?

Snowhead. Thank you very much. Thats extremely helpful. I think that's exactly what I need. Do I remove the nut and olive from the isolation valve then place it on the tail of this adaptor?

Also, can some please explain the directional arrow on the isolation valve.

 

[Best]

Hi. Thanks for the reply. How do you know which ones I've got?

No offence intended, but diy people don’t usually know any better and just buy the cheap small bore isolating valves, which also tend to leak, or fail when turned.
Also I guess majority of folk doing it themselves are cost conscious

 

[Best]

Hi. YorkshireDave. Thanks for the reply. How do you know which ones I've got?

Snowhead. Thank you very much. Thats extremely helpful. I think that's exactly what I need. Do I remove the nut and olive from the isolation valve then place it on the tail of this adaptor?

Also, can some please explain the directional arrow on the isolation valve.

The tap tail adaptors (or rad valve tails) are tightened into the iso valve and the thread end is for the flexi hose (if it is a hose with a nut & flat rubber washer)
Simple as that.
The arrow to fit with flow direction is so that the valve is fitted leaving the valve works not in danger of pushing apart. And on another point - cheap iso valves are not for heating pipes.

 

[jrtrrror]

Thank you for the reply.
Sorry, I didn't understand your explanation regarding the arrow on the valve is,

The tap tail adaptors (or rad valve tails) are tightened into the iso valve and the thread end is for the flexi hose (if it is a hose with a nut & flat rubber washer)
Simple as that.
The arrow to fit with flow direction is so that the valve is fitted leaving the valve works not in danger of pushing apart. And on another point - cheap iso valves are not for heating pipes.

 

[Best]

Thank you for the reply.
Sorry, I didn't understand your explanation regarding the arrow on the valve is,

The parts inside the isolating valve are made in the factory pushed in from one end, pushed in same as direction arrow points. If you installed the valve wrong direction on high pressure, there is a risk those works could come apart inside.
I have never seen that occur though, despite finding many valves with arrow wrong direction

 

[S.P.S.]

We know you have the cheap iso valves as the full bore valves don’t generally have a direction arrow...also you mentioned holes inside, this is the press fitted locking “ring” that holds the seals in.

Make sure the point of the arrow points towards the tap.

In terms of putting a valve in a long run of pipework, you just follow the flow... from the mains stopcock the arrows all point away.

Use the item in the first link to connect your tap tails to the iso valve, as yes, the sharp edge is not ideal to connect to, although many “plumbers” do.

All the best with the install.

Stu.

 

[Chester]

I normally use 15x 1/2 male irons, maybe ill try the tap tail connectors but they're more expensive oddly.

 

[ShaunCorbs]

I normally use 15x 1/2 male irons, maybe ill try the tap tail connectors but they're more expensive oddly.

Not if you keep them from old valves