Gasoline
Aviation Gasoline
Regular Unleaded
Regular Leaded
Premium Unleaded
Gasoline/Methanol blend, less than
5% methanol
Gasohol, less than 40% ethanol
NOTE: If the level indicator is used in a non-compatible fluid, swelling, cracking and dissolving may occur,
leading to level-indicator failure. If your product is not chemically compatible with the level indicators, contact
OPW Fuel Management Systems Customer Service for recommendations.
Determining Product Group for a Standard Water Level Indicator
Figure 9-4 Determining Type of Standard Water Level Indicator
Standard Water Level Indicators feature one of two different ballast weights and are etched for gasoline or
diesel (see Figure 9-4). This weight allows the level indicator to sink through the product, but to float on the
water. This registers the height of the water at the product/water boundary. The weight is certified by OPW Fuel
Management Systems for use with one of two product groups, the gasoline group OR the diesel group. There
is a mark etched on the ballast weight plate ("g" for gasoline, "d" for diesel). The water float for gas also has a
white outer ring while the water float for diesel is black.
Stainless-Steel Water Level Indicators are weighted internally and are laser-etched with their specific-gravity
rating.
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