This 4" Liquid Filled Pressure Gauge is designed to measure low pressures up to 15 psi, featuring a flanged connection with a 1/4" NPT fitting. The liquid-filled design minimizes the effects of vibration, ensuring accurate readings in various applications. Ideal for HVAC systems, water pressure monitoring, and other low-pressure environments, this gauge is built with durable materials to withstand harsh conditions. It complies with industry standards, making it a reliable choice for professionals seeking precision in pressure measurement.