To LSX or not on compression pipe fitting?

[Justice League]

Going to put in new iso valves and on the compression fitting should a smidgen of LSX be used around the olive?

On the other end will be fitting tap tail adaptors again using olive and smidgen of LSX.

Tap Tail Adaptors

These two tap tail adaptors give you the connections you need to fit your flexible tap tails with 15 mm isolation valves. The helical screw threads fix tightly onto the tap tail to make installation easy. The small size ensures you save space around the fitting and simplifies your set-up. The...

www.toolstation.com

So is there any downside in using LSX?

Also would this be a better solution using iso valve plus tap tail adaptor to just using a flexi adaptor with built in iso?

Aim is long term leak prevention and repair if required.

 

[Chuck]

If you want long life use high quality fittings, e.g. Pegler / Kuterlite, and install and test in accordance with manufacturer's instructions.

 

[rpm]

Chance are the iso valve might last longer than the flexi if left untouched so I use seperates. There is no downside as such to using LSX but being new fitting & olive you shouldnt need it. Also prefer copper to brass olives being softer.

 

[WC1]

I think most plumbers use joint compound if anything rather than lsx. I have used lsx in the past, main thing I would say is don't over apply as it's insoluble and it'll get into the system.

 

[ShaunCorbs]

Jetlube v2 for me don’t like lsx as it’s more like a silicon

 

[rpm]

Jetlube v2 for me don’t like lsx as it’s more like a silicon

Whats wrong with that for you shaun.

 

[ShaunCorbs]

Whats wrong with that for you shaun.

It can clog valves and filters and also ot makes removing stuff difficult as it grips / sticks it etc

 

[WC1]

It can clog valves and filters and also ot makes removing stuff difficult as it grips / sticks it etc

 

[Justice League]

It can clog valves and filters and also ot makes removing stuff difficult as it grips / sticks it etc

Even for a bath tap or ot makes its way around the system?

 

[Justice League]

Chance are the iso valve might last longer than the flexi if left untouched so I use seperates. There is no downside as such to using LSX but being new fitting & olive you shouldnt need it. Also prefer copper to brass olives being softer.

I came across these. A service valve with a 15mm thread fitting. Now these are commonly used for toilets. Why are they not used with flexi tails?

Primaflow Nickel Finsh Straight Service Valve - 15mm | Wickes.co.uk

Primaflow Nickel Finsh Straight Service Valve - 15mm

www.wickes.co.uk

So what is best practice when it comes to isolation valves?

Are you supposed to put them in an accessible place so you can reliably close the water supply away from the actualy tap or put them close to the tap for example on the end of the pipe as it attaches to the tap.

 

[WC1]

Why are they not used with flexi tails?
- because that's not what they are for. They are for use with hard pipe.
Why not try a flexi with iso incorporated?
Best practice - as close as possible to the tap but accessible and visible and make sure they are round the right way. I.e slot facing out.

 

[rpm]

It can clog valves and filters and also ot makes removing stuff difficult as it grips / sticks it etc

Whilst I can agree on the first point if over used, but you only use a light smear I can not agree with the second point.