Just fixing up two yellow MSR pumps and pulled out the military JP8 pump that comes with the Miltary issued XGK EX. There doesn't seem to be much on here about this pump. It's just the same as the standard MSR pump but with a little extra plastic. It makes you wonder what took MSR this long to add a plug to the pump. One of the noticeable problems on both ends when disconnecting pumps. All good if you're in the garage playing with stoves but in field use this will help my love of MSR stoves. Now if they could just get the XGK ex up to par I'll be set. Cheers Jeff
That's a nice feature. Have not picked up one of those stoves yet, too much and I prefer the oldies. Duane
In my opinion the Dragonfly pump is the best as it has the valve inside to stove stop leaks. This plug would have the same effect. It is a good idea.
I prefer the oldies as well. The pre shaker xgk. The new ones are just large and loud. The dragonfly pump is good too. The stove needs an update in my humble opinion. Cheers Jeff
I like the DF over the Omnifuel and Nova. It is more finely tuneable, the O-ring on the Omnifuel does not allow precise tuning and I can't lube it with the proper stuff to let the spindle move freely. Duane
Is that cap shipping with the consumer pumps or just the military version? I like the modern pump best where msr is concerned but on the whole I don't care for the design decisions that were made from the very beginning. Too much plastic. Plastic can crack. Plastic can melt. Msr has obviously been fabulously successful but I just have never been a fan when it comes to the pumps. It tickles me when I hear that people are using ergo pumps through the whisperlite universal's butane adapter.
I believe MSR uses plastic as it will melt and slowly release pressure, whereas metal pumps may build up pressure and explode. Also, the NRV can fail or come out on the metal pumps, then you have a big issue if using gas. Ross or someone here had the NRV assembly come off a few years back. Maybe Doc Mark can recall what the MSR reps said about their use of plastic. Duane
Hi Paul, Yes it's only the military version that comes with this plug. Why they don't make all pumps that way is beyond me and I hope they read this site. Listen MSR ! The simple design of the MSR pump with seahorse shape has a simple but cleaver design. The nrv is only exposed to air inside the bottle. See the picture below. Add some imagination and picture the pump inside the bottle. This is how the pump is oriented while in use. With the bottle filled only to the line on the bottle the NRV (non return valve) aka one way valve is only exposed to air while in use. Be it compressed air when pumped but it's air and not a lot of compression. If the nrv fails the bottle will decompress through the pump and gas vapors will be coming out where the pump handle is. The stove while lit should be a fair distance away and should go out. That said the control valve is right where the pump handle is and the gas vapor. Mind you also the gas vapor has to make it past the pump cup too. Also it should be noted that if the nrv fails it's most likely going to be held in because of the pressure inside. The difference between the Primus pump is that an nrv failing means fuild comes out pushed by air. Both pumps rely on plastic with rubber seals and springs. I personally like the Primus/Optimus pumps but most of that is because of the connections those pumps use. Don't say the MSR pump didn't warn ya at least. It says on the side. "Respect fire" Cheers, Jeff
