One of my jobs for the new mens shed is to set up reticulated compressed air around the shed and thought some of you now or in the future might like to see some comparative costings for different systems.
The main workshop are is 14.5 x 7.5 m, the 45 cfm compressor is outside the shed in an enclosure and the specifications/costing are for a complete loop around the shed (44m of pipe) with 10 drop down access points around the walls. The drop downs were to be done with Flexible High Pressure plastic pipe.
The systems costed were
1) 20 mm Galv pipe. ($537)
Pipe is expensive (~$8/m), fittings are cheap, ($2/$3) but can be reused.
Installation is time consuming and retrofitting awkward.
Pipes will eventually rust
2) 19 mm copper pipe ($518)
Similar costs for pipe and fittings to Galv pipe although fittings not normally reusable - they are cheap away.
Installation is not as time consuming as Galv but retrofitting still awkward.
3) Flexible High Pressure plastic pipe & compression fittings (CF) ($326)
Pipe comes in a cheap (minimum length) 50 m roll but CFs are expensive
Installation and retrofitting are easy
Main problem with this is that expansion of pipe produces dips which stops water from draining properly
4) rigid High Pressure plastic pipe & CF ($575)
Pipe or hose is closer to Galv and Cu price and CF (same as for the flexible pipe) are expensive
Installation and retrofitting are easy and no problem with water draining properly.
The main workshop are is 14.5 x 7.5 m, the 45 cfm compressor is outside the shed in an enclosure and the specifications/costing are for a complete loop around the shed (44m of pipe) with 10 drop down access points around the walls. The drop downs were to be done with Flexible High Pressure plastic pipe.
The systems costed were
1) 20 mm Galv pipe. ($537)
Pipe is expensive (~$8/m), fittings are cheap, ($2/$3) but can be reused.
Installation is time consuming and retrofitting awkward.
Pipes will eventually rust
2) 19 mm copper pipe ($518)
Similar costs for pipe and fittings to Galv pipe although fittings not normally reusable - they are cheap away.
Installation is not as time consuming as Galv but retrofitting still awkward.
3) Flexible High Pressure plastic pipe & compression fittings (CF) ($326)
Pipe comes in a cheap (minimum length) 50 m roll but CFs are expensive
Installation and retrofitting are easy
Main problem with this is that expansion of pipe produces dips which stops water from draining properly
4) rigid High Pressure plastic pipe & CF ($575)
Pipe or hose is closer to Galv and Cu price and CF (same as for the flexible pipe) are expensive
Installation and retrofitting are easy and no problem with water draining properly.
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