11/9/2023 0 Comments Platypus water bottle capThe one thing we have heard the most from you is that you find the Vecto's threads to be too soft to get a good seal with some filters, mainly the Sawyer Mini. Standard Specification for Dimensions and Tolerances for Plastic Bottles Last Note About Threads and Vectos We hope that wasn't too confusing to you and if you really want to dig in dipper into the world of threads and tolerances, here are two more resources: This is why we used the thinner threads of the PCO 1881 on the 1817 shape, so they both fit! The above makes you wonder, why do the SmartWater bottles work so well with the Sawyer filters but not the HydroBlu? Simple: the PCO 1817 has thicker threads that won't fit well into the HydroBlu's thinner grooves. Platypus bottles: SP 400 (old), SP 410 (new).Just to give some context, here are some of the threads out there: This allows it to use the pressure seal of the PCO while working with SP threads (that are thin) like the PCO 1823. To solve that, we opted for a hybrid of threads to provide the most options for you when in the field: The Vecto uses thread shape from the ISBT PCO 1823 and fits them on the PCO 1817. Even more frustrating, the thread can sometimes be different for each product. Despite the "28mm neck" claims of so many filters, in reality, they often end up having different threads. To give you a better idea and perhaps offer some confusion, here is what a thread spec sheet looks like:Īll these boring technical stuff has a point - we wanted the Vecto to work well with as many threads as possible. Many of the pressurize soda bottle use this thread as it provides an excellent seal. The ISBT threads differ in where the point of connection to the bottle is (depending on bottle shape) and ranges from 1810 to 18, each with a slightly different thread shape. The ISBT threads are used very widely for any pressure threads since they have a non-continuous thread (they have grooves) that are offset to allow an excellent seal. The ISBT threads are the most common so I'll only explain those: There three main groups: two by Husky that are either for flat water (Obrist) or pressure top (Alcoa), and one by ISBT ( International Society of Beverage Technologists). This group of threads was developed specifically for what we know today as soda bottles. The illustration below explains these threads: In this group are also SP425 and SP430, which have a slightly different thread pattern and are usually used for a higher seal item. These are the most common threads, which have interchangeable caps that really only differ in the length of the neck (aka, depth of the cap). In this group, there are SP400, SP410 and SP415. SP threads are recommended threads for PET (Polyethylene terephthalate) bottles in a variety of neck sizes, are meant to allow for easy closure, and have similar dimensions. To give a quick explanation, here are the main groups: SP Threads Not only are they not standardized, threads for 28mm threads can fall under the set 28mm group (Alcoa, Orbist or PCO) or under the size ranges (SP400/410/415). "ĭespite this apparently simple definition, things are not that simple: bottle threads are not standardized but follow more of a recommended guideline. It must be engineered to be cost-effective, to provide an effective seal (and barrier), to be compatible with the contents, to be easily opened by the consumer, often to be reclosable, and to comply with the product, package, and environmental laws and regulations. Either continuous threads or lugs are used. To take the Wikipedia definition (for a screw cap): " A screw closure is a mechanical device which is screwed on and off of a "finish" on a container. When talking about threads, we mean the screw-like lips on the neck of the container (in our case, the Vecto) that connects with a cap or a filter for a perfect seal to prevent leaking. The new Vectos have a stiff neck and a unique thread to allow a universal seal using mechanical torque. The 2nd generation Vectos that we are offering work with practically any kind of 28mm female thread: all the Sawyer filters, HydroBlu, LifeStraw, you can use any cap, hose connection or anything else that has a 28mm female thread. March 2019 update: Most of what is mentioned below relates to our 2018 Vectos as we kept adjusting the thread to fit a greater range of connections. So, to clear things up, maybe it is time to talk about those seemingly "simple" threads and add a little more info about the Vecto. We get so many questions about threads it seems funny that something so simple (from the looks of it) gets so much attention, but it does.
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