3/8" NPT Vent Limiting Device

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NOTE: this product is already included with the Maxitrol new 325-5V & 325-5LV series (replaces old 325-5 & 325-5L series) regulators we sell and should not be purchased unless a replacement is needed.
Size: 3/8" NPT. For use with: 325-5, 325-5L, 325-5V, 325-5LV series.
Vent limiter (vent limiting device) prevents excessive gas venting when regulator is installed indoors.