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Marshall

Marshall LBB00015 Fuel Pressure Gauge Black 0-15 PSI

★★★★★4.6 (218 reviews)

Compact 1.5-inch liquid-filled fuel pressure gauge with stainless steel construction for reliable 0–15 PSI readings.

$24.99*
✓ In Stock on Amazon.com
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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

The Marshall LBB00015 Fuel Pressure Gauge is a liquid-filled, stainless steel instrument designed for accurate low-pressure readings across a range of automotive and general-purpose applications. With a 0–15 PSI measurement range, it is particularly well suited for carbureted fuel systems, low-pressure oil lines, water systems, and pneumatic setups. The liquid fill — typically glycerin — serves a critical function: it dampens needle oscillation caused by engine vibration and pressure pulsation, allowing you to take steady readings even while the engine is running.

The gauge features a 1.5-inch diameter face for a compact footprint and connects via a 1/8" NPT center back fitting. An integrated easy vent plug lets you bleed trapped air from the case after installation, ensuring the needle moves freely and readings remain accurate over time. The all-stainless steel housing provides resistance to corrosion from fuel vapors, moisture, and underhood heat, making it a durable addition to any low-pressure monitoring setup.

Key Features

1.5" Direct Mount Pressure Gauge, 0-15 PSI, 1/8" NPT center back connection.

Use for measuring pressure on fuel, oil, water, air and other non corrosive media not exceeding 15 PSI.

Easy vent plug for accurate readings every time. Install gauge so that the nipple plug is facing up. Once installed, cut the nipple on the plug.

Buy with Confidence: We take care of all issues with a replacement or refund within 12 months.

Quality Assurance: We double check every gauge for accuracy before shipping.

Specifications

Pressure Range
0–15 PSI
Connection
1/8" NPT center back mount
Dial Diameter
1.5 inches
Material
Stainless Steel
Fill
Liquid-filled
Dial Color
Black
Compatible Media
Fuel, oil, water, air, and other non-corrosive media
Special Feature
Easy vent plug for accurate readings

Pros & Cons

👍 Pros

  • Liquid-filled design dampens needle vibration for stable, easy-to-read measurements in high-vibration environments.
  • Stainless steel construction provides corrosion resistance and long-term durability.
  • Compact 1.5-inch diameter fits easily in tight engine bay locations.
  • Easy vent plug simplifies maintenance and ensures continued accuracy.
  • Versatile for multiple non-corrosive media including fuel, oil, water, and air.

👎 Cons

  • 15 PSI maximum range is too low for fuel-injected systems that typically operate at 40–60 PSI.
  • The 1.5-inch dial face is small, which can make precise readings difficult at a glance.
  • 1/8" NPT center back mount only — no side or bottom mount options, limiting installation flexibility.
  • No luminous dial markings for visibility in low-light conditions.

Frequently Asked Questions

It measures from 0 to 15 PSI, making it suitable for low-pressure applications such as carbureted fuel systems, oil, water, and air lines.
The gauge housing is filled with glycerin or a similar liquid that dampens the needle, reducing vibration-induced flutter and pointer bounce. This results in steadier, more readable measurements in environments with engine vibration.
It uses a 1/8" NPT (National Pipe Thread) center back mount connection.
The vent plug allows you to release trapped air from the liquid-filled case. This helps the gauge maintain accurate readings and prevents the needle from sticking due to air pockets inside the housing.
Yes, it is rated for fuel, oil, water, air, and other non-corrosive media, as long as the pressure falls within the 0–15 PSI range.

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