Direct Replacement for the RCI FP‑800
Dieselcraft 5×16 Fuel Purifier – same class, same ports, no filter element, better solids handling.
Meet the Dieselcraft 5×16 Purifier
The RCI FP‑800 is no longer available—but the system requirements it served haven’t changed. The Dieselcraft 5×16 is a direct, drop‑in replacement: same 15‑GPM class, same 1" NPT ports, and the same element‑free separation concept, with a simpler, more durable internal design.
RCI FP‑800 vs. Dieselcraft 5×16
Direct Replacement Comparison Sheet
Product Overview
The DISCONTINUED RCI FP‑800 was a 15‑GPM, 1″ NPT, element‑free fuel purifier used in fuel‑polishing skids, generator day‑tank loops, and bulk storage systems. The Dieselcraft 5×16 occupies the same performance class and plumbing footprint while improving solids handling and serviceability. This makes it the practical, drop‑in successor for any FP‑800 installation.
Side‑by‑Side Technical Comparison
| Category | RCI FP‑800 | Dieselcraft 5×16 |
| Flow Class | 15 GPM nominal | 15 GPM operating range |
| Port Size | 1″ NPT | 1″ NPT |
| Separation Method | Mechanical, no filter element | Mechanical, no filter element |
| Filter Elements | None | None |
| Internal Design | Multi‑piece internal steel strands | Simplified, Proprietary water separation media |
| Solids Handling | Moderate; sensitive to sludge and biomass | Enhanced sludge, rust, and microbial mass capture |
| Water Separation | Impact‑based | High‑residence mechanical separation with proprietary media |
| Service Access | 1/2″ Dain valve | 1/2″ Dain valve |
| Status | Discontinued | Current production, fully supported |
Key Advantages of the Dieselcraft 5×16
- Direct plumbing compatibility with 1″ NPT ports and same system class.
- No filter element, matching the FP‑800’s maintenance philosophy.
- Improved solids removal, especially sludge, rust, and microbial mass.
- Simpler internal geometry, reducing service time and long‑term maintenance cost.
- Active production and support, ensuring technical help.
- Includes water sensor and mounting hardware.
Recommended Positioning Statement
The Dieselcraft 5×16 is the direct replacement for the discontinued RCI FP‑800—same 15‑GPM class, same 1‑inch ports, same no‑filter design, with improved solids handling and easier service.
Typical Applications
- Fuel‑polishing skids for diesel storage tanks
- Generator day‑tank circulation loops
- Marine and fleet bulk storage
- Industrial and municipal standby power systems
- Replacement of legacy FP‑800 units in existing installations
Frequently Asked Questions
A DIESELCRAFT Fuel Purifier removes free water, heavy particulates, and sludge from diesel fuel using a no‑filter, mechanical separation process. Fuel enters the chamber, slows down, and contaminants drop out by gravity and impact. No disposable filter element is used
DIESELCRAFT purifiers are designed to remove:
• Free water
• Rust flakes
• Scale
• Sludge and microbial mass
• Heavy particulates
They do not remove fine suspended solids or emulsified water. A downstream filter is still required for polishing to micron levels.
No. All FP DIESELCRAFT Fuel Purifiers operate without a filter element. They rely entirely on mechanical separation and our proprietary media.
Drain intervals depend on fuel condition. In clean tanks, draining may be infrequent. In older or contaminated tanks, the bowl may need to be drained more often. All units are supplied with water sensors to indicate drain time.
DIESELCRAFT purifiers remove biomass clumps and sludge associated with microbial growth, but they do not kill microbes. A biocide treatment is required if active growth is present.
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