Dumb question I guess, but - Well, I have collected MSR stoves, also Optimus and Primus stoves, with their various bottles. Which bottle may I use with each brand? At least with my Svea 123 I am not confused! Thanks Tom
Try and see. All MSR stoves work with all MSR bottles afaik. But new Primus and Optimus bottles won't work with old MSR pumps. You will hear a lot of concern with putting new MSR pumps on new Primus and Optimus bottles. It's because the stretchy rubber seal needs to stretch. Doesn't worry me, and it does work with a solid seal even if it looks odd. The seal is actually inside the neck not at the stretchy outer rim. Can't speak for what the other way looks like- don't have any Primus or Optimus stoves.
It comes down to the shape of the fuel bottle neck and the type of pump seal. Primus has used both round O-Rings and flat seals on their pumps. Optimus has always used flat seals on their pumps and all of my MSR pumps have round O-rings. My Brunton bottles have both tapered necks and fatter flat necks. My MSR bottles have tapered necks. My Primus and Optimus bottles have flatter necks. I have seen on one occasion the round O-ring of a pump being forced out of the neck of a bottle under pressure, unfortunately I don't remember what bottle/pump combination it was. It is my current practice to match the bottle neck to the proper seal on the pump. I have no problem using brand specific bottles to same brand pumps as they were designed to work together, this is also for Coleman and Soto as their products are unique.
I am not sure whether this is the right place (maybe the more suitable is the fuel bottle threading and interchangeability discussion). I got access to a Quechua 0.75 l bottle which has the same threading as Primus fuel bottle (Quechua cap is Primus compatible as well as the Quechua bottle is compatible with the Primus Multifuel pump). Did a test today. The Quechua description says -"...suitable for fizzy drinks. Do not use with fatty substances (dairy products, oils...) or acidic drinks (fruit juices, energy drinks)" - and the Quechua bottle is thinner than the Primus bottle. Moreover, when I unscrewed the fuel pump (there was still some pressure in the bottle), there was something like a mist (not sure whether there was something similar in the Primus bottle when I did the same exercise). What I also noticed is that the Quechua cap has 3 slits through the threading (seen on the picture), so there is no need to drill a hole through the cap. I am not sure whether and how the material of the cap is going to be affected by the petrol fumes and the pressure built when the bottle is carried in warm environment, i.e sunny summer days. Maybe somebody more experienced may comment on the quality of the Quechua bottle, its cap and sealing material. As a side thought, people here comment that the closest threading to the Primus bottle is 1 1/16" but I recently screwed a 3/4" plastic pipe ( 3/4" is one of the the sizes used in plumbing) and seemed to fit OK. Thanks for the advice.
As you say the bottle is thinner than the proper fuel bottle. Do not use it as a pumped bottle. The cap might be identical dimensions to the primus cap but is the plastic or the gasket fuel safe? You could test it by immersing in fuel overnight then measuring the dimensions and checking for stickiness but you already know this is a drink bottle. Ive said for a long time that drink bottles that look like fuel bottles are potentially dangerous. Yes I own a few because they are the only bottles you can get without those stupid sipper tops
@5y4 Yes, best to just get a proper fuel bottle. The bottle you have is a water bottle, if it can't handle fat or oils (per your information), you sure don't want to be storing hydrocarbon fuels in it under pressure.
