should the fuel supply Tee fitting on a Webasto heater be before or after the fuel filter?

I have an older car 2006, so don't think the fuel system is pressurized. Thanks in advance.

Question

should the fuel supply Tee fitting on a Webasto heater be before or after the fuel filter? I have an older car 2006, so don't think the fuel system is pressurized. Thanks in advance.

This question is related to Webasto or Eberspacher heater fuel connector tee kit 8x5x8 | 31277B.

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Answers (1)

Answered by Butler Technik's David Butler
Posted 8th September, 2025 at 12:00 by David Butler

It is recommended to install the Webasto fuel connector T piece before the filter, the aim is to reduce the suction line flow resistance where possible.

As you are aware, if using a T piece into the engine fuel feed it is very important that the fuel system is not pressurised

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