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Worldwide distributor of NSN parts and consumables located in the USA.
Worldwide distributor of NSN parts and consumables located in the USA.
A device designed for installation in the main riser of a dry or empty pipe automatic sprinkler system and held closed by spring force, air, or water pressure. Water is automatically released to the sprinkler system either by releasing or lowering the pressure beyond the requirement or admitting and increasing the pressure to overcome the spring force.
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