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Marshall LS00015 1.5
Marshall LS00015 1.5
Marshall LS00015 1.5
Marshall LS00015 1.5
Marshall

Marshall LS00015 1.5" Fuel Pressure Gauge - Silver Dial 0-15 PSI

★★★★★4.3 (59 reviews)

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

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Overview

The Marshall LS00015 is a 1.5-inch fuel pressure gauge built for monitoring low-pressure fuel systems in the 0–15 PSI range. Its liquid-filled stainless steel case is engineered to absorb vibration and pressure spikes, keeping the red pointer steady against the silver dial even when mounted directly to an engine or fuel rail. The 1/8" NPT center back connection is a widely compatible thread size, and the compact dial diameter makes it easy to tuck into tight engine compartments where space is at a premium.

A notable feature is the Easy-Vent nipple plug, which lets you purge trapped air from the gauge housing after installation. By positioning the nipple upward and cutting its tip, you ensure the liquid fill is properly settled and the gauge delivers accurate readings from the start. Marshall backs every unit with individual accuracy testing before it ships and a 12-month replacement or refund policy, making it a reliable choice for carbureted setups, return-style regulators, and other low-pressure fuel monitoring needs.

Key Features

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

Silver Dial, Red Pointer, Liquid Filled, Stainless Steel Case and Bezel

Easy-Vent Nipple Plug for accurate readings every time. Install gauge so that the nipple plug is in the upright position, then cut the nipple to vent gauge.

Quality assurance: Every gauge is double checked for accuracy before shipping.

Buy with confidence: We take care of all quality-related issues with a replacement or refund within 12 months.

Specifications

Brand
Marshall Instruments
Model
LS00015
Gauge Type
Fuel Pressure
Pressure Range
0–15 PSI
Dial Size
1.5 inches
Dial Color
Silver
Pointer Color
Red
Connection
1/8" NPT center back
Construction
Liquid Filled
Case & Bezel Material
Stainless Steel
Warranty
12-month replacement or refund

Pros & Cons

👍 Pros

  • Liquid-filled design dampens vibration for stable, readable needle movement.
  • Stainless steel case and bezel resist corrosion in engine bay environments.
  • Compact 1.5-inch diameter fits tight mounting spaces on fuel rails and regulators.
  • Each gauge is individually tested for accuracy before shipping.
  • Easy-Vent nipple plug simplifies air removal for precise readings out of the box.

👎 Cons

  • 0–15 PSI range is too low for fuel-injected systems that operate at higher pressures.
  • Small 1.5-inch dial can be harder to read at a distance compared to larger gauges.
  • Center back connection only — no bottom or panel mount option without an adapter.
  • Silver dial and red pointer may not match existing gauge clusters in all vehicles.

Frequently Asked Questions

It uses a 1/8" NPT center back connection, which is the most common fitting size for fuel pressure applications.
The Easy-Vent nipple plug allows you to remove trapped air from the liquid-filled case. You install the gauge with the nipple plug facing upward, then cut the nipple tip to vent the gauge for accurate readings.
The liquid fill dampens the needle movement caused by engine vibration and pressure pulsation, which keeps the pointer steady and makes the gauge easier to read during operation.
Yes, Marshall covers quality-related issues with a replacement or refund within 12 months of purchase.

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