V1, V2 & V3 Overview

Basic Understanding of the Shadow V1, V2 & V3 Overflow

Thank you for choosing the Synergy Reef Shadow® Overflow. The original Shadow V1 was introduced in 2016. The V2 was released January of 2020. And the V3 was released on March of 2022.

They all have a sticker located on the bottom of the rear overflow with a serial number.

  • V1 Serial Numbers 0000-5000 - The sticker will only say "Shadow Overflow"

  • V2 Serial Numbers 5000-7000 - The sticker will say "V2 Shadow Overflow"

  • V3 Serial Numbers 7000+ - The sticker will say "V3 Shadow Overflow"

The holes that are Drilled into the tank all use the same template for V1, V2 & V3. Nothing has changed in the hole patterns.

These installation instructions are for Our V2 & V3 overflows with a serial number 5000 and up. If your overflow has a serial number less than 5000, please do not use these instructions and use the instructions for the V1 Shadow® overflow.

The V3 now includes a Quiet Flow™ Weir design which uses an internal plate inside the front box of the overflow. Please make sure to remove the tape that holds this in place during shipping. The Front weir plate may also need to be removed and cleaned from time to time, but should be almost maintenance free. See Internal Front Box

Overview of the Components of the Shadow V2 Overflow
Figure A.4
Side Cross Section of the Shadow Overflow

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