Replacement Quartz Thimble Suit GT7-8K UV System - 895mm x 24.5mm OD Also Suit GT7-13A (GT7-8K-Thimble)

Ultraviolet Replacement Thimble - Suit 7-8K and 7-13A

Suits: GT7-8K 50 Lt/Min and GT7-13A 91 Lt/Min
Design: Thimble Design with one end closed in and rounded, and the other end is open (as pictured below)
Size: 895mm length x 24.5mm Outer Diameter

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 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.

We, therefore, recommend replacing the thimble every 1-2 years.

***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)