Four Seasons receiver dryer - no visible markings to show flow direction

[Eurasiaoverland]

I just received a Four Seasons receiver dryer #33403 (as it seems that the Denso aftermarket part # 478-0101 is not R134a compatible). However, I have gone to install it and notice that, unlike the Denso part, there is no labelling of which port is input and which is output. Does anyone have any insight into which way round the ports are? I struggle to see that it could be reversible.

Thanks

 

[bhsdriller]

I'm pretty sure there's an arrow on top, I just installed one a couple weeks ago

 

[Eurasiaoverland]

Thanks. There certainly isn't anything on mine, could you show me a picture of yours if it's still around?

 

[bhsdriller]

Yeah I drove it to work today so i'll go out and grab one later

 

[bhsdriller]

Did a quick search and it actually says IN on one side. Mine is exactly the same.

 

[Eurasiaoverland]

Well, I just went out to the car (it's dark here) to take a picture to show you there was no marking, and under the phone flashlight I saw a very faint 'IN'. There's so much paint on it that it's invisible under ambient light, only with the strong flashlight at a low angle does it become faintly noticable.

And, of course, I had it on the wrong way round (though I have not taken the caps off yet so no problem with that).

Thanks very much indeed for your info!