[mvpel]

By the way, could you have a look at the photo in #6 and tell me what the green, black, and white fittings are used for in the upper right quadrant of the photo?

[telebob]

"By the way, could you have a look at the photo in #6 and tell me what the green, black, and white fittings are used for in the upper right quadrant of the photo?"

Pop Quiz...

Just looking at it from 20,000 feet away, it looks to me like:

Horizontal Top - Simplex check valve.

Horizontal Bottom - (Attached to the galv. fitting) Possible pressure relief valve.

Verticle Right - Possible air relief / vacuum breaker

White Tank - Hydropnuematic tank for some purpose, possible surge protection or pulse dampening. The main tank may be fed by a reciprocating (piston) type pump or pressure boosting centrifugal pump.

What's the real story?