# V2 Tank, V4 Resin refill

**URL:** <https://forum.formlabs.com/t/v2-tank-v4-resin-refill/26735>\
**Category:** Form 2\
**Created:** [February 24, 2020, 7:26pm UTC](https://forum.formlabs.com/t/v2-tank-v4-resin-refill/26735 "2020-02-24T19:26:18Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![mrwakefield](https://avatars.discourse-cdn.com/v4/letter/m/e68b1a/32.png) [@mrwakefield](https://forum.formlabs.com/u/mrwakefield)\
**Post date:** [February 24, 2020, 8:48pm UTC](https://forum.formlabs.com/t/v2-tank-v4-resin-refill/26735/5 "2020-02-24T20:48:40Z")

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Unfortunately you can’t mix Black v2 with Black v4. Take a look [here](http://forum.formlabs.com/t/formlabs-resin-releases-master-list/16960) for a list of resin versions and changes. You’ll need to empty out the v2 resin from the tank before filling it with v4. When you try to print something, that is when it will give you the option to update the tank.

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_[View the full topic](https://forum.formlabs.com/t/v2-tank-v4-resin-refill/26735)._