The Planted Tank Forum - View Single Post - Metering(needle) valves selection for our CO2 pressurized system
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post #237 of (permalink) Old 02-16-2013, 04:58 AM
Darkblade48's Avatar
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,673
This is the Burkert? I am pretty sure polarity does not matter for AC solenoids.

However, if you want to be consistent, the left prong of a power cord is neutral (white), the right prong is live (black), and the bottom prong is ground (green).


A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
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