



Radium Engineering Check Valve Fuel Filter Conversion Kit
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Description
Radium Check Valve Fuel Filter Conversion Kit
Application: Universal – Radium high flow fuel filters with the standard green outlet (20-0220-0X)
Part Type: Check valve fuel filter outlet conversion kit
Part Number: 20-1221
The Radium 20-1221 Check Valve Fuel Filter Conversion Kit converts the outlet of a standard Radium Engineering high flow fuel filter (green outlet) into a check valve outlet. Flow testing shows a 1psi pressure drop at 300LPH and 2.5psi at 700LPH.
A check valve filter stops fuel rail pressure dropping when the engine or pump is switched off, which helps the engine restart faster. Typical uses are fuel pumps without a built-in back-flow check valve, and venturi jet pumps that run on the high pressure side rather than the return side of the system.
Key Features
- Check Valve Outlet: Converts a standard green-outlet Radium filter to a check valve outlet
- Low Restriction: 1psi drop at 300LPH, 2.5psi drop at 700LPH
- Holds Rail Pressure: Prevents line pressure loss when the pump is off for quicker restarts
- Same Filter Body: Suits the Radium 3-piece 6061 aluminium, Type-II anodised filter with 10AN ORB ports
Optional Parts
- Radium High Flow Fuel Filter (20-0220-03 / -04 / -05) – the standard Radium fuel filter (green outlet) this kit converts
- Radium Engineering Fuel Filter with Check Valve - 10 Micron Stainless (20-1220-03) – complete filter supplied with the check valve outlet already fitted
- Radium Engineering Fuel Filter with Check Valve - 6 Micron Microglass (20-1220-05) – complete filter supplied with the check valve outlet already fitted
- Radium 60mm 2-Piece Clamp Mounting Bracket - Single (20-0218) – 60mm filter mounting clamp
- Radium Fuel Filter Clamp 60mm w/Heat Exchanger (20-0221) – 60mm clamp with cooling fins, works best with airflow (e.g. under the vehicle)
Important Notes
- Converts an existing Radium high flow fuel filter – the filter body and element are not included
- Complete filters with the check valve outlet already fitted are available as 20-1220-03 (10 micron stainless) and 20-1220-05 (6 micron microglass)
- Radium does not list the kit contents – contact iilumolab if you need to confirm what is supplied
Vehicle Fitment
- Universal – see Application
If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.
Installation
We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.
Note
Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.

