Hopefully NickB will be along cos he is chapter and verse on this.....I am led to believe that the scubapro mk25 is a good dir reg i.e. ;routing but what about the mk20 also what is a good price for the mk25 second hand .All help is appreciated
Yes, Mk20 or Mk25 are ideal. The only thing bad about them is the price.! Don't buy new, get them on ebay. They make excellent stage regs too.I am led to believe that the scubapro mk25 is a good dir reg i.e. ;routing but what about the mk20 also what is a good price for the mk25 second hand .All help is appreciated
Spot on. The Mk25 evolved from the Mk20 with the addition of an IP adjustment (sort of). Really, you don't get much adjustment; plus/minus one bar is about it. Major adjustment is still done by adding or removing shims inside the reg, but once it's set (in the factory), it doesn't shift by much.The MK20 is essentially a MK25 without the ability to alter the IP from the outside.
Correct, but buying a Mk20 and all the parts you'd need to convert it to the latest Mk25 spec would cost more than buying a Mk25 to start with. The new piston is a very worthwhile upgrade and your service technician should swap it out for free during a service. I service my own and my LDS will swap an old brass piston for a new one for free.It is possible to buy the parts to convert a MK20 into a MK25.