Jamn,
I just posted photos of a tank fill system I put together, check out the Homemade Equipment thread (page 4 or 5, regarding the Homefill II). total system cost was less than $2300 and tank fills with amortized capital costs are estimated to be $13. The system is similar to the one abr sells, but mine has 2 compressors and costs about 1/2 the amount. The schematic is also posted along with parts so that you can piece one together yourself, if you so desire.
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