How to choose filter flasks in an apartment:
1.The choice of the type of flasks – standard or custom cartridges :
Non-standard flasks, of different sizes, even with the exceptional technical characteristics of replaceable cartridges, the buyer / consumer is tied to one manufacturer. I attribute this to a giant minus, because the price is not regulated (no competition), not always available (problems with delivery, customs clearance), production error, etc. In the case of at least one factor, the purchased and installed flask is doomed. Therefore, I think it is right to choose only water filters for home with world-standard cartridges (in size).
2. The choice of the size of the flasks – in standard flasks, 4 sizes can be distinguished:
- Diameter 115 mm, Height 320 mm – we call Slim 10
- Diameter 115 mm, Height 570 mm – we call Slim 20
- Diameter 180 mm, Height 330 mm – we call Big Blue 10
- Diameter 180 mm, Height 590 mm – we call Big Blue 20
When installing, it is also worth considering the length of the thread, as when the flask is unscrewed, its height increases precisely by this length. For Slim flasks – 40 mm, for BigBlue – 55 mm.
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3 . The choice of flask material is an absolute coincidence:
It is strange to say so, but experience suggests that not everything that is expensive is the best, and vice versa (the idea is about plastic flasks). Each manufacturer has a regulation of use, temperature, pressure. There were problems with different manufacturers, but now they have already settled on a particular supplier – not cheap, but you can sleep peacefully.
Transparent vs opaque – I won’t say which is better. Transparent ones are a little more expensive, but it is more pleasant to work with them, both during the service and visually just for the consumer. We have not yet a single transparent bulb burst, perhaps because we use them much less often.
Regarding metal flasks – no problems have been encountered yet, although the choice is small.
4. For hot water, I think it is correct to use only metal flasks , not plastic ones (no matter how much they cost). There is such a thing as thermal expansion … Since during the use of the flask in hot water, water can reach 50-80 degrees, after consumption the water in the flask becomes room temperature – 10-20 degrees. Not every material is able to withstand a large number of expansion-contraction cycles.
5. For cold water – no difference, plastic is 3 times cheaper than metal, but for convenience it is better, of course, to use the same ones – it is exclusively a financial issue.
6. Brass insert vs solid head:
I state my personal opinion: a brass insert is an extra element, or rather an additional, optional element that is welded into the head of the bulb, which in any case reduces its strength. Plus a brass insert – it is much easier (and without risk to thread the thread) to screw another thread. With a monolithic plastic neck, it is different – it is much stronger, more airtight (if it speaks correctly). Minus – if something is screwed into it not by thread – the money is gone .
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