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The P322660 features a standard 1/2" NPT configuration
the sudden increase in fluid velocity causes the internal automatic ball checks to seat horizontally (or vertically depending on the lower arm design)
OEM Compatibility: Designed specifically for Aaon equipment
It can be configured for positive pressure
Weil McLain 511-044-505 Gas Valve THPU32HP7Y The P322660 features a standardThe Weil McLain 511 044 505 gas valve is a critical service component engineered for high efficiency hydronic systems. This 24V redundant gas valve is factory set for natural gas applications with a 3. 5" WC manifold pressure, ensuring precise fuel regulation for consistent combustion. Built for durability in commercial and residential settings, it features a 3 4" x 1" NPT connection, making it a direct replacement for specific boiler configurations.
