I have a SP MK3 first stage that I'm using for a pony reg. SP apparently doesn't make the service kit for it anymore (kit no. 10.103.041). I can use a kit for a MK2 for most of what I need, except for the HP stem o-ring (127 amber) and the piston head o-ring (168 amber). Does anyone know what the sizes of these two o-rings are so I can pick up a couple at a hardware store?
My MK3 is a later model with the 3000 psi yoke. I'll be using it with an air filled pony, so I don't have to worry about o-rings designed for EAN.
My MK3 is a later model with the 3000 psi yoke. I'll be using it with an air filled pony, so I don't have to worry about o-rings designed for EAN.