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NESD | Wet boom uses a rigid pipe and a dry boom uses rubber hose between the nozzle bodies, not sure why they are labeled as such, but a wet boom offers higher flow capabilities over a dry. Found the description below online.
Wet and Dry Booms
There are two types of booms: wet and dry. A boom is considered a wet boom (Figure 1, bottom) if the pipe span is not only used as a support mechanism for the spray nozzles but delivers spray solution to them as well, hence the name "wet boom." A boom that is used merely as a span along which to space the nozzles, but which does not deliver the spray solution, is considered a dry boom (Figure 1, top). The solution is delivered to the nozzles via a separate hose line which runs along the boom span using it as a support mechanism to mount each nozzle.
Edited by Lil' Hoss 3/23/2008 19:32
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