1. Would someone please explain "upstream" regulator design? What is this? What manufacturers DO NOT use an upstream design? 2. Isolator valve on manifold: Si or No ? 3. Ocean diving, drysuit. Double my alum 80's or my steel 72's (2650psi)? Thanks, BDG _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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