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<blockquote data-quote="syevad" data-source="post: 570110" data-attributes="member: 10066">wow...this is a lot more involving than I thought - I thought it was about the use of o-rings but you&#039;d need to buy a special neck (or modify an existing one?)....no wonder many wouldn&#039;t be bothered.With a bit of diy anyone can experiment with o-rings - in my case I&#039;ve used a combination of silicone&#039;s tubes and o-rings. The sleeves are about 7mm and a minute gap is left to accomodate the o-ring snugly enough to keep them in place when sliding the mouthpiece in and out. My diy version looks just like the picture above only imagine cream coloured silicon tubes instead of silver chrome metal (and no neck chanbes...it can be done on any existing neck).It works great for a while, but the o-rings I&#039;ve used started deteriorate quickly - I&#039;ve used basic o-rings for diy plumbing.Maybe with some special o-rings and lubricants it is possible to use this system a bit longer but the stress is concentrated on a relatively small surface...</blockquote>

[QUOTE="syevad, post: 570110, member: 10066"] wow...this is a lot more involving than I thought - I thought it was about the use of o-rings but you'd need to buy a special neck (or modify an existing one?)....no wonder many wouldn't be bothered. With a bit of diy anyone can experiment with o-rings - in my case I've used a combination of silicone's tubes and o-rings. The sleeves are about 7mm and a minute gap is left to accomodate the o-ring snugly enough to keep them in place when sliding the mouthpiece in and out. My diy version looks just like the picture above only imagine cream coloured silicon tubes instead of silver chrome metal (and no neck chanbes...it can be done on any existing neck). It works great for a while, but the o-rings I've used started deteriorate quickly - I've used basic o-rings for diy plumbing. Maybe with some special o-rings and lubricants it is possible to use this system a bit longer but the stress is concentrated on a relatively small surface... [/QUOTE]

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