Replacement Quartz Thimble Suit GT7-9K UV System - 895mm x 23mm OD (GT7-9K-Thimble)

Ultraviolet Replacement Thimble - Suit 7-9K

Suits: GT7-9K 50 Lt/Min 
Design: Thimble Design with one end closed in and rounded, and the other end is open (as pictured)
Size: 895mm Length x 23mm OD
**REQUIRES 1x GT7-2NSF-OR O-Ring

UV System Maintenence Notes:

Ultraviolet systems are rated based on a dosage level of UV-C radiation into the water (mJ/cm²), with 30mJ/cm² being the standard level of disinfection and a minimum dose of 40mJ/cm² required to comply with Australian Drinking Water Guidelines. Our lamps are rated with a 9000 hour (1 year) lifespan, after which point the lamp will naturally degrade and the level of radiation produced by the lamp cannot be guaranteed.

The UV lamp sits inside a quartz thimble, which protects the electrical components of the lamp from making contact with the water. We specifically use quartz (fused silica) for this application because it is strong, exhibits thermal resistance, and has excellent UV transmission properties.

However, over time, metal ions fused within the silica structure of the quartz thimble interfere with the UV-C radiation produced by the lamp, which reduces the UV transparency of the glass and causes it to become fragile. This process is called solarization.

Tannin, bio-film, algae, and scale can also build up on the outside of the glass thimble, further preventing ultraviolet light produced by the lamp from penetrating through the thimble, and impairing the system's ability to sanitise the water passing through.

Thus, we recommend replacing the lamp every 12 months, and the thimble every 1-2 years.

GT7-9K System - Replacement Parts Below

• 1x 7-9K UV Lamp (Replace Every 12 Months)
• 1x 7-9K Thimble (Replace Every 1-2 Years)
• 1x 7-2NSF O-Ring (Replace Every 1-2 Years (along with Thimble))
• 1x 7-8K Power Source (Ballast)