RW Beckett Oil Tank Gauge 4504 KING float gauge for 275/330 gal tanks (42–44 in) clear vial, 1-1/2" & 2" NPT

This single-piece gauge provides a straightforward visual of remaining oil and installs into standard bung openings on basement or outdoor vertical tanks. Built with a clear plastic vial and a long-lasting plastic float, the 4504 KING was designed for tanks with a depth between 42 and 44 inches and fits 1-1/2" and 2" NPT threaded bung holes. It gives quick readings at quarter, half, three-quarter, and full levels so you can plan refills without guessing.

How will this gauge fit my existing heating oil tank?

The 4504 KING is engineered for standard 275- and 330-gallon vertical tanks that measure 42" to 44" in depth. The gauge's threaded collar accepts both 1-1/2" and 2" NPT bung sizes, allowing it to be used in most common installations without adapter spools. Check your tank depth and bung thread before purchasing to confirm compatibility.

• Designed for 275 and 330 gallon vertical tanks
• Accepts 1-1/2" and 2" NPT threaded bung openings
• Length suited for tanks 42"–44" deep
• Straight insertion into standard bung hole; no complex fittings

How easy is it to read and maintain the gauge?

Reading the 4504 KING is immediate: the clear plastic vial shows the float position against marked increments for 1/4, 1/2, 3/4, and Full. Routine maintenance is minimal — periodically verify the pivot arm clears the tank wall and keep the vial free of debris for accurate sighting. The plastic float is designed to resist corrosion and perform reliably in typical heating oil conditions.

• Visible markings for quarter, half, three-quarter, and full
• Plastic float resists corrosion and fuel exposure
• Simple visual checks recommended; no tools required
• Inspect pivot arm clearance if float shows erratic movement

What materials and build features ensure longevity?

The gauge uses a clear plastic vial paired with a durable plastic float to prevent rust and deterioration common with metal-only assemblies. The pivot mechanism is designed for long-term service when installed correctly — avoiding contact between the arm and tank side extends service life. Because it’s a low-complexity mechanical device, it’s easy to replace if damaged during routine tank work.

• Clear plastic vial for corrosion-free viewing
• Plastic float constructed for extended service life
• Threaded NPT collar for secure tank mounting
• Minimal moving parts reduce mechanical failure points

Will this gauge work outdoors and in basements?

Yes — the 4504 KING is suitable for both basement and outdoor vertical tanks. The materials are chosen to handle typical environmental exposure in heating fuel storage applications. For outdoor installations, check that the bung seal is tight and protected from freezing or extreme weather impacts to preserve accuracy.

• Suitable for basement and outdoor use on vertical tanks
• Requires proper bung sealing for outdoor exposure
• Protect from extreme temperatures where possible
• Regular visual inspections recommended in harsh climates

Who is this for: The R W Beckett 4504 KING Oil Tank Gauge is ideal for homeowners, property managers, and service technicians who need a low-cost, dependable way to monitor oil levels in standard 275 or 330 gallon vertical tanks. If you want a simple, corrosion-resistant sight gauge with clear quarter-level markings and compatibility with common 1-1/2" and 2" NPT bung holes, this model offers a straightforward solution that’s easy to install and maintain.