Product review (4 stars): EveryDrop 3 is a Perfect Replacement for Thermador's REPLFLTR20 (at least for fridge #T42BD830NS10)
It seems like Thermador has a staff of people that goes on the internet and erases any reference to a cheaper replacement for its own filter for its side by side refrigerators. For some reason, a generic or cheaper version is impossible to find on a reliable basis. Even when you think you find one, there's always some review for my specific fridge that says "buyer beware - this generic filter doesn't fit your Thermador and leaks all over the place - don't do it, just pay Thermador for their ridiculously priced filter! Trust me an learn from my mistakes as I'm a verified Amazon purchaser" Thermador's filter number is #REPLFLTR20 and specific current model is #00750673 as of June 2017 (replaced #00752595 00655179) and this filter is ON SALE on their website for the low low low price of $108 down from $135.

That said, I don't feel like spending $216+/year for filters for my fridge. I hunted and hunted and saw that this Everydrop 3 might fit my fridge and took a chance. I CAN CONFIRM THAT THIS EVERYDROP 3 IS A DIRECT AND PERFECT FIT FOR MY THERMADOR FRIDGE. The filter cap you need to swap out from filter to filter fits perfectly, the filter fits in perfectly to the fridge, it is the exact same shape and size as the REPLFLTR20 with all the same features, there are no leaks, etc.

I'm sure some Thermador employee will come on here and say that their genuine REPLFLTR20 filter will make all your dreams come true with magical pixie dust, and this EveryDrop 3 on the other hand opens a portal to the Dark Dimension allowing demons to infiltrate your household, but this EveryDrop 3 is good enough for me. I ran 5 gallons of water through the filter - after 1 gallon the water was running clear, but just decided to keep running it. I'll probably flush two more gallons through for good measure. I'll report back if something goes wrong or the demons do appear.

In case there's another Thermador owner searching for a cheaper replacement filter, I have a Thermador Professional 48" side by side fridge and freezer #T42BD820NS10.

There might be some even cheaper generic filters that might fit (that replace this one), but $32 each is cheap enough for me for a "name brand" EveryDrop.