Is the MSR fuel pump compatible with any other kind of fuel bottle, or must you only use their bottle?
ive used a old sigg bottle for years ive just switched to a msr bottle as the sigg's bottom was deforming with the pressure
in my experience primus/optimus bottles are too thick and will deform the pump gasket collar without making a seal and only seal to MSR bottles
It is best to use the MSR bottle or one of the earlier Sigg bottles...the Sigg was what MSR started with in 1973. As MSR bottles are two a penny why use anything else unless you have the Siggs?
The new duraseal pump has a cup shaped washer for the bottle seal that requires the thinner top on the MSR bottle to work properly. I have used it on an optimus bottle and worked ok but the washer makes it a very tight fitting. I havent tried but cant see any reason not to either cut this washer flat or replace with a flat viton one. Dont use with the chinese bottles though. They are a very lose fit on the pump and there cap will not screw into a msr bottle
I've used the new duraseal pump on an optimus bottle (the newer green one). It worked but I had to tighten down quite a bit to make sure it didn't leak. I might get an new MSR bottle if the seal works better with the smaller lip though.
I wonder what design philosophy caused msr to change from a standard o-ring to the proprietary one? It seems to me that the old o-ring worked just fine.
make only your bottles fit and you sell more of your bottles. Simple economics. At least they didnt change the thread excluding all other options
Perhaps MSR's o-ring/washer did not live up to expectations and had to change the design to a more proprietary one. Then again as some say, its economics. Take for example the soto stove featured by HJ and Doc Mark where the bottle neck is also proprietary so you really have to buy their bottles but unless you have a very good product with lots of customer support as well as parts, it will not sell. Ron
well... mail order may be different, but in the past 8 months I havent seen any soto muka stoves sold at the store and in my talking to people its ussually 6 out of 10, the bottle issue
The threads on the following brands of bottles are generally compatible: Sigg, Primus, Optimus, MSR, Brunton, and Snow Peak. I had trouble one time threading an MSR pump into a Primus bottle. The threads started further down the neck of the Primus bottle, and I couldn't get the MSR pump to "bite" into the top of the threads. A Primus pump works fine on an MSR bottle. Soto and Coleman bottles aren't compatible with each other or any other brands. I've seen the bottoms of older Sigg fuel bottles become convex over time with use with MSR pumps. Something to be careful of. Best to keep the pressure moderate. MSR developed the Duraseal (that's the red collar that replaced the old black "O" ring) for a reason. The old "O" rings were a major source of failure, perhaps the #1 point of failure for MSR stoves. The Duraseal is designed to last longer and be more crack resistant. We'll see, but so far I think it works well. The Duraseal collar can be used with non-MSR bottles, but I'm not sure how good of an idea it is. With some bottles, the Duraseal gets quite stretched which might cause premature wear. The Duraseal does work though with all of the brands of bottles I've tried except Primus which I couldn't get the pump to seat on. HJ
Hmm. I have a couple pumps now with the red collar. Are you saying they do not take an o-ring? They seem too hard to not use an o-ring, they seem more like they would hold the o-ring in place good. I ordered a bunch of MSR o-rings from a supplier to fit all my bottles, pumps and more pumps. Duane
Hi, Duane, No, there's no reason to use an "O" ring with the Duraseal pump. The "O" ring is for older pumps. HJ
Hmm. No wonder a pump leaked last weekend on my new used Dragonfly. Just got a bag full of o-rings today. I'm set for life. Duane
i am using the duraseal pump on a sigg bottle, but first i removed the red duraseal and replaced it with the standard o ring. this can be a fingernail breaking exercise, so i suggest warming the seal with hot water before removal. it bothers me when makers tweak their products to make them LESS compatible with other brands. makes me think that someone might suffer for it Presscall for modulator (emeritus)
Hey, All, My Brother-in-law asked me to check out a used MSR Whisperlite that he got at a yard sale, along with an older Sigg fuel bottle, but no pump. It was in excellent condition, and I bought him a brand new MSR Duraseal pump for it. However, when trying to screw the newer pump into the older body, it leaked like a sieve! So, we went down to REI in San Diego, and I bought him a proper, new MSR fuel bottle, in the size you wanted, and VOILA, everything worked like a champ, just as it should!! At CASG 7, I used my MSR #9 and had a good bit of fun with that outstanding stove!! I paired it with a brand new MSR pump, and a newer fuel bottle, and it worked just like it grew there!! My advice, is to use what you are supposed to use, and forget about trying to jury-rig new MSR pumps to work with old fuel bottles. Why mess with it, when the new bottles are not that expensive, and should your jury-rig setup fail, a new bottle is FAR less expensive than hospital bills!!! My two cents..... Take care, and God Bless! Every Good Wish, Doc
I am not familiar with the MSR "Duraseal". Can you retrofit an older MSR O-ring style pump body with a Duraseal? (I am assuming the Duraseal fits onto the pumps body, but let me know if I am wrong). If anyone has a picture of a Duraseal to post that would be informative. My experience is that MSR O-rings crack and fail after just a couple of years (yeah, maybe I was not as good as I should have been about keeping 'em lubed...) I have a whole bunch of older O-ring style pumps, and if it is possible to retro-fit a "Duraseal", and if they last better than the O-rings, I will do it.
Howdy, Sooty, Good to hear from you! The seal, itself, comes off, but if it were me, I'd not muck about with trying to fit it onto an older MSR pump. Just get a new pump, and call it good. Also, when keeping spare fuel bottle o-rings, I've often carried them, lubed with a good gun grease, in a small, double plastic bag. That way, when I need on, it's already lubed up, and ready to install. I would really not trust any of the seals in any stoves to last a full year, unless they were made of leather, or cork, just to be safe. Again, just my two cents, and others do things their own way. Good luck, and God Bless! Every Good Wish, Doc
Thanks Doc! I have no real reason to buy a new pump body other than to avoid the inconvenience of failed O-rings discovered right before a trip. Which is not a very compelling reason. I just thought that if the Duraseal can be purchased separately and can be retrofitted to the old pumps it might save some bother looking for O-rings at the last minute. I will drop by REI and take a look at the new pumps and see what its all about. I keep too a few spare O-rings, well lubed, in a film canister. But where the heck did I put that little canister..? Have y'all noticed that its the O-rings that you leave ON the bottles between trips that go bad quickly? A nuisance. Ummm... is MSR still using O-rings to seal their bottles? Or is there a "Duraseal" for bottles now as well?
