Replacement O-Ring Seals Suit 24.5mm OD Quartz Thimbles & Sleeves (GT7-8NSF-OR)

O-Ring Compliant to NSF/ANSI 42 - Suitable for use in WaterMark Certified UV Systems

Suitable for 24.5mm OD Thimbles

Suits FSA Model: GT7-8K

* Product is designed to fit the above FSA systems - other brands may vary and may not be compatible

Please Note -  We do not accept returns for refunds or exchanges for change of mind, incorrect size, wrong qty purchases of o-rings.

Please select carefully. If in doubt contact us. 

O-rings are specific to manufacturers' systems. Systems can look the same but have different specifications of diameter or thickness.

***Please note that there are two styles for the GT7-8K System per the below image.***

Type A: Domed Style GT7-8K System - Replacement Parts Below

• 1x 7-8K UV Lamp (Replace Every 12 Months)
• 1x 7-8K Thimble (Replace Every 1-2 Years)
• 1x 7-8NSF O-Ring (Replace Every 1-2 Years (along with Thimble))
• 1x 7-8K Power Source (Ballast)

Type B: Twin Nut Style GT7-8K System - Replacement Parts Below

• 1x 7-8K UV Lamp (Replace Every 12 Months)
• 1x 7-8K Thimble (Replace Every 1-2 Years)
• 2x 7-8NSF O-Rings (Replace Every 1-2 Years (along with Thimble))
• 1x 7-8K Power Source (Ballast)