Hello :cheesy:
I know this isn't exactly what you were asking, but the 5 gallon tanks with 8 x 1/2" ports are 21" Long x 10 1/2" Deep x 12 1/2"High. That may give you an idea.
The only place I have seen 5/8" air line advertised (I'm sure there are many others) is at
www.teampneumatik.com.
Regarding the upgrade to the 5/8" line, the only parts that would need changing from a 1/2" line system are the parts where the 5/8" line pushes in. So that would be 8 fittings with 1/2"NPT on one end and a push-in fitting for 5/8" line on the other (assuming that you have a 4-way system with 1/2" inflation valves and air springs with 1/2" ports). The fittings would most likely be 90 degree elbow pieces, but do not have to be.
The advantages of a 100% duty compressor is that it can run all the time - but not all day every day. Have a look at the following link and read questions 5, 6 & 7 in particular.
http://www.viaircorp.com/faq.html
A Viair 450 compressor can fill a 5 gallon tank from 110 to 145psi in just under 2 minutes.
I don't know about the lift speed, but a 1/2" system with 1/2" line is considered to have fast capabilities, so 5/8" line will have greater capabilities:

:cheesy:
Last edited by M-827 at Nov 29 2003, 06:57 PM