Marshall
Marshall LB00015 Liquid Filled Fuel Pressure Gauge
★★★★★
Compact 1.5-inch liquid-filled pressure gauge with 0–15 PSI range and 1/8" NPT connection for fuel, oil, and air systems.
$20.99*$22.99Save 8%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
Durable Liquid-Filled Design: Filled with silicone fluid to dampen vibration, pulsation, and shock, ensuring stable and accurate readings even in high-vibration environments.
Rugged Construction: Features a 304 stainless steel case and bezel for maximum corrosion resistance and durability in harsh environments and outdoor applications.
Precision and Range: Provides reliable accuracy (±3-2-3% or ±1.5% ASME B40.1 Grade B) for pressure measurement in liquids or gases.
Versatile Application: Ideal for water pumps, compressors, hydraulic systems, and fuel pressure testing; compatible with oil, water, air, and gas (WOG).
Easy Installation and Reading: Features a standard 1/4" NPT (or 1/8") Male connection with a clear, easy-to-read dial
Specifications
Gauge Size
1.5 inches
Pressure Range
0–15 PSI
Connection
1/8" NPT center back
Fill
Liquid filled (silicone)
Construction
Stainless steel, aluminum
Media Compatibility
Fuel, oil, water, air, and other non-corrosive media
Warranty
12-month replacement or refund
Pros & Cons
👍 Pros
- Liquid-filled design dampens vibration for steady readings in engine and equipment applications
- Compact 1.5-inch dial fits in tight spaces where larger gauges cannot be mounted
- Stainless steel and aluminum construction provides durability in demanding conditions
- Easy vent plug simplifies installation and ensures accurate initial readings
- 12-month replacement or refund policy with each gauge double-checked for accuracy before shipping
👎 Cons
- 15 PSI maximum range limits use to low-pressure applications only
- 1/8" NPT center back connection may require an adapter for systems with different thread sizes
- Not suitable for corrosive media, restricting use to fuel, oil, water, and air
- Small 1.5-inch dial can be difficult to read at a distance or in low-light conditions
- Liquid fill may leak if the gauge housing is damaged, rendering the vibration dampening ineffective
Frequently Asked Questions
What does the liquid filling do in this pressure gauge?
The silicone liquid fill dampens needle vibration and pulsation, providing stable, accurate readings even when the gauge is mounted on equipment that produces vibration, such as engines or compressors.
How do I use the vent plug on this gauge?
Install the gauge with the nipple plug facing up, then cut the nipple on the plug. This vents trapped air from the liquid-filled case and ensures the needle moves freely for accurate readings.
What thread size does this gauge use for mounting?
The gauge uses a 1/8" NPT (National Pipe Thread) center back connection, which is a standard thread size found on many fuel and oil system fittings.
Can this gauge be used with corrosive fluids?
No. The LB00015 is designed for non-corrosive media only, including fuel, oil, water, and air. Corrosive chemicals may damage the internal components.
What is the maximum pressure this gauge can measure?
The gauge measures from 0 to 15 PSI. It should not be used in systems that may exceed 15 PSI, as overpressure can damage the gauge mechanism and produce inaccurate readings.
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