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Radium Pump Outlet Adapter, Check valve

This 6AN male adapter is used to integrate a high flow check valve on the outlet of many fuel pumps. The valve out flows the integrated check valve that comes standard on many fuel pump outlets. Furthermore, decreasing this restriction allows the pump to operate at less current. This keeps fuel temperatures lower and prevents cavitation. The two billet aluminum adapter halves are secured together with a stainless steel retainer and bolts that clamp tightly around the pump outlet. A stainless steel plunger and spring are used for making a one-way connection. Viton O-rings seal for a leak free connection and E85 compatibility.

Test Comparison
We have tested fuel pumps with and without check valves. With any check valve, flow and current draw will be affected. The two check valves tested were the standard integrated pump outlet check valve and the Radium Engineering check valve.

Standard integrated check valve:
Flow Restriction: 46-76 LPH
Current Draw: 3.2-4.8 Amps
Radium Engineering check valve:
Flow Restriction: 15 LPH
Current Draw: 0.5 Amps
The Radium Engineering check valve is very specific to the pump. It will only work on pumps listed below. NOTE: Before ordering, make sure the pump outlet hose barb ridges are in excellent condition. Damaged or non-round hose barb ridges may prevent the O-ring from obtaining a positive seal.

If you have a deadline to meet, please confirm that we have stock ready for dispatch to avoid disappointment!

FREE SHIPPING ON ORDERS OVER $1200!**

Product Info

Compatible - These pumps did NOT come standard with a check valve, thus are perfect candidates for the Radium Engineering check valve.
*TI Automotive E5LM (BKS1000 Brushless Controller Kit)
Walbro/TI Automotive F90000295
Bosch Motorsports BR540
Deatschwerks DW400 (pre May 2019)

Not Compatible - The check valve will physically fit these pumps, but they come standard with an integrated check valve that can NOT be removed.
Walbro/TI Automotive F90000267
Walbro/TI Automotive F90000274
Walbro/TI Automotive F90000285
Deatschwerks DW400 (post May 2019)

Shipping & Returns

Free Shipping does not apply to some heavy items, for example: Wisefab & BC Racing are included for free shipping, NPC and some PWR are not included.

Shipping times may vary depending on your location, however the majority of packages are received within 3-5 business days of dispatch!

We dispatch 5 days a week, and aim to process all orders within 24hrs*

On weekends and public holidays, orders will be processed next business day.

*order processing may be delayed during sale events or holiday periods.

Payment Methods

We accept all major payment methods including Visa, Mastercard, AMEX & Paypal.


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