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Synergy Reef Systems

Shadow® Overflow Replacement Gasket Kit

Name: Shadow® Overflow Replacement Gasket Kit
Brand: Synergy Reef Systems
Price: 24.99 USD
Availability: InStock

Official OEM Replacement Gasket kit for the Shadow® V1, V2 or V3 Overflow System. Kit contains 4 TPU gaskets.

What's Included:

4 X Original OEM TPU Gaskets for the Shadow® Overflow.

In stock

$24.99 USD

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Let customers speak for us

from 132 reviews

Great sumps and

Great sumps and accessories

Mike OBoyle

Synergy Reef Systems

04/20/2026

working great

The sump I purchased is working great. I wanted to add a sensor so I needed another return cover to modify. Fast and fits perfect.

Mark Lee

Synergy Reef Systems

03/31/2026

SK 60 Clarisea & Filter Sock Sump and ATO

Worked with Rick and the Synergy Reef team to build a custom sump for a 235 gallon reef tank. The order process was fantastic, customer service was professional and always prompt. Received my sump this week and wanted to share that it exceeded my expectations! It's absolutely beautiful and of high quality. Packaging and delivery were excellent without any issues or concerns. Overall a great experience!

Anonymous

Synergy Reef® SK-60 Clarisea SK5000 & Filter Sock Sump

03/01/2026

Great looking professional built sump.

I love my Triton 60 sump. We are still setting up my tank room for my dream tank, but I can tell already that the sump will definitely be a centerpiece in the room. The tank will be a peninsula so the sump will be seen from the living room. I just love how it looks. I plan on using the full Triton method and this tank fits all the requirements and more. I wet tested it right after I received it and had no problems. It was shipped with the utmost care as I could see by the way it came. I just wanted people to know that after months of comparing sumps that I picked a winner.

Shawn Rosh

Synergy Reef® TS-60 Triton Method Aquarium Sump

02/19/2026

Direct replacement

Direct replacement for overflow. Happy with parts.

Mario Atkins

Shadow® Overflow Spacer Ring Kit

02/18/2026

Fit exactly as it should have

Fit exactly as it should have, great support team and shipped quick. Great job

George X

Replacement Weir for 16" Shadow Overflow

02/16/2026

Great customer service!

Great customer service! I needed help with my v1 overflow and they helped resolve the issue without purchasing a full overflow.

Anonymous

Shadow® V3 Overflow Rear Box Upgrade Kit Only

01/12/2026

It’s a beast of a box. However the best box i’ve seen on the market with the highest flow rates for my 7x2x2 aquarium. I’ve not fitted it as yet as my aquarium is still in the process of being built. Be aware. If you are ordering to the UK there is an extra £140 duty that you have to pay you can’t get around it.

D.W.

16″ Shadow® Overflow V3 2500 GPH

12/22/2025

CL-26 Aquarium Sump

Awesome sump ! The build and the delivery time was excellent. The Synergy CL-26 Sump fit perfectly underneath my stand with plenty of room to maneuver. Was able to fit a Simplicity DC320 Protein Skimmer with no issues, plenty of space ! Very pleased with this sump ! Thank you SYNERGY 🤘🏻🤘🏻🤘🏻

William Bain / UPS Store

Synergy Reef® CL-26 Aquarium Sump - Delete

01/04/2025

Convenient

Layers of glue is not best sealing approach but effective. All my flow goes thru the shortest with u installed for noise. 800 gallons an hour through filter sock others just drip into sump.

Tom Shaw

Internal Pre-Cut Pipe Kit

01/01/2025

63 mm Hole saw

Worked great nice clean cut!!

Shawn Hall

63mm Diamond Hole Saw

12/16/2024

Line Lock

I purchased the double kit for my 75 gallon system. They work great I have used them for years!!

Shawn Hall

Loc®Line Return

12/13/2024

Great over flow

I installed it on my 75 gallon tank. Works great so quiet once tuned in. Synergy provided get information from drilling holes to installing and adjusting. Super quite great product!!!

Shawn Hall

16″ Shadow® Overflow V3 2500 GPH

12/13/2024

Very impressive

Given its superior quality, customizable color options, and robust functionality, the Synergy Reef sump is highly recommended for a stylish and efficient filtration system.

Shaun Jones

Synergy Reef® SK-44 Clarisea SK5000 & Filter Sock Sump

12/06/2024

For large aquaria this is the only overflow that can handle high gph in a single unit.

Dominic

16″ Shadow® Overflow V3 2500 GPH

11/25/2024

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Shadow® Overflow Replacement Gasket Kit