Well I'm working on this at the min and would like to know what you think of it and what I could do to make it any better...

Don't worry about the background yet I'm just working on getting the pipes done first. so any comments or ideas you have plz do tell..

While it looks great, from an engineering point of view that dog wont hunt.
It looks like all the joints are threaded which makes you wonder how it was put together. I'd consider using flanges/nuts and bolts for at least some of the construction if you are looking for realism. Apart from that - great stuff so far!

The texture and general look is really good. Anything with big hand valves would be welded or use sanitary flanges (big flat disk joints with bolts). Also you have two valves and two ways through so opening or closing both of these won't stop the flow through this system. It's just not functional.

 Also through use these valves never end up exactly straight in line with the pipes. I'd turn any handle or nut and bolt at a slightly different angle from the pipes or each other.

This reminds me of the utility room in the last house I rented. It had this weird pipe loop that connected the cold water to the hot water if you opened a valve. (!?!) After some problems with a leaky pipe we cut that weird little bypass out. Nothing exploded, so I guess it wasn't necessary. Never did figure out why that was put in. Applying what I remember from e-fundies to this, I would say the resistance and, judging from the look of those two little tank-things, capacitance of the system would vary when closing those valves. Maybe this is a component in some sort of analog hydraulic computer. Interesting.

modelling is great, but i'd work a bit on the white parts, maybe give them a bit more wear and tare.. just because :)

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Reminds me of one of those pipework miracles you would sometimes find in old ships, no one could remember why or how the stuff was put together in that particular way (lack of spares in the middle of the ocean, use a valve instead of a plug, or a piece of pipe welded shut on one side etc) , but in the best shipboard tradition of "if it works and doesn't leak leave it alone" pieces were just added and never replaced.