Hope it's O.K. to start a new thread on this one subject. When disassembling the brake lines, I'd found what I originally thought was a "residual pressure valve" that threads into the 3-way brass T-fitting, then the other 2 lines from the T-fitting feed both rear wheel cylinders.
The section of line in question is a Goodridge piece with a banjo fitting for the rear brake master cylinder and then the other end of the section threads into the T-fitting.
In researching this morning, I found various manufacturers selling flex brake line sections and this one I've got looks to be similar.
Am I correct in thinking that Lehman did NOT use a residual pressure valve (RPV) at all and that what I'd thought was an RPV is actually only a free-flowing brake line fitting ?
As always, Thanx in advance........