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-That is odd and it certainly does not correspond to the experience i have with the reg. One of my dive buddy's used to have a Scubapro G250/mk20 reg and it freeflowed all the time. He tried all kind of tricks with it like detuning it and even went so far as to apply silicon grease on the internal parts of the 2nd stage in a desperate attempt to prevent ice from forming. It always worked well to a certain depth of about 30-35m and then it started to freeflow. He finally got pissed off and bought an Apeks reg. I have also seen loads of scubapros freeflow and have had a lot of people telling me it sucks for cold water. I should mention that i have never used a scubapro myself. My experience with it comes from seeing other people using it and people telling me it sucks. We have in fact several student kits equipped with scubapro regs that we rent out to our OW students. I have seen scubapros freeflow even in the summertime when the water temp is pretty high and in the winter they freeflow all the time. One of our instructors told me that he had a scubapro freeflow on him in the 20c pool. It sounds unbelievable but he insists it is the truth. He was in the process of showing his OW students how to breathe from a freeflowing regulator. He did this by pressing down the purge but when he did let goo of the purge button the reg still freeflowed. He could not stop the freeflow so he surfaced and to his amacement he found a big block of ice on the 1st stage. There are witnesses to the insident and i do not think he would lie about this. I laughed for a week when i herd the story. At least our students get top training on freeflowing regs :-) But we are changing them out now. We have a saying about "Suckapro" as we call them. They will start freeflowing in the trunk of your car on the way to the dive site. You know the Scubapro slogan "deep down you want the best". When i see an advertisement with that slogan it always makes me laugh. But i have to admit that you are not the first that claims good cold water performance from Scubapro regs. I do not think you are lying either because i have seen people diving both deep and cold with out any problems. I cant figure out why they freeflow on some and on others not though. But that seems to bee the case. I can certainly see that they can freeze eisier on beginners like our OW students because they are all enormous hovers. They sometimes sucks so badly on that hose that you are worried about the cylinder imploding from the negative pressure. I have to tell you that we once had a student that hovered so badly that when watching his bubbles on the surface you thought a depth charge went off!! That was amazing! When he got out of the water i checked his gauge because i wanted to calculate his RMV. This could bee a new record i thought and it was indeed. He had an RMV of over 70 liter (do not know how much that is in cuft ) per minute!!! This most bee a new world record, i mean even if the reg DID freeflow he still would not bee able to empty that cylinder so quickly. This is totally off topic but i thought that it might amuse some of the readers. On the outer hand i have seen the reg freeflow on very experienced divers such as my dive buddy i mentioned earlier. One other explanation would bee bad air and water in the tanks. But that is not the case with us because we have a very good set of filters on our compressor and being very anal we send in cylinders for analysation every 3 month. Maybe Scubapro have difference in quality between reg to reg. I do not know. Best, Ingemar Peter Fjelsten wrote: > Den 17:07 07-01-99 skrev Ingemar Lundgren noget i som godt kunne ligne > ... > >Some of the regulators on this test has to few dives on them to give a > > >good picture of the reality. > >What i have found though from my experience and divers i have talked > >is that there seems to bee a few regulators which are better than > >others for cold water. Apeks TX40-50 works very good. We have made > >thousands of dives with it and only 2 or 3 freeflows to date. Poseidon > >regulators also works great for cold water but they have other > problems >such as among other things a poor breathing 2nd stage. All > the >Scubapro regs i have tested worked very poor in cold water. The > worst >being the R-190 and G-250 together with the mk-20 first stage. > At least >50% chance of freeflow. The problem seems to bee with the > first stage >because the G-250 works good together with a Poseidon > first stage. >Scubapro might have solved the cold water problem with > the new mk18. I >have herd promising reports from divers involved in > testing it. > > Sorry to disagree, Ingemar, but I have owned a Mk20/G250 combo for > almost a year now and dived with it in our water (as cold as Sweden). I > have had NO freeflows of any kind. I has be slightly detuned. > > The Apekses have given me no problems at all. > > Hope this helps,,, > > Hilsen (Best regards), > > Peter Fjelsten > ___________________________________ > TekDykningsWeb 3.0 > http://welcome.to/pf -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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