Blue Lagoon O-ring EPDM 59.99 mm x 2.62 mm - 3902110

Blue Lagoon O-ring EPDM 59.99 × 2.62 mm – 3902110

Restore a watertight end-cap seal on your Blue Lagoon unit with this genuine EPDM O-ring. Sized precisely at 59.99 mm × 2.62 mm, it fits the lamp/quartz head on multiple Blue Lagoon UV-C reactors and ProfiHeater models to stop drips and protect internal components.

• Exact OEM size for reliable end-cap sealing
• EPDM material resists pool chemicals and heat
• Quick, low-cost fix to stop weeping connections

Compatibility

Used across the Blue Lagoon range, including:

• Tech UV-C (16/40/75/130 W)
• Timer UV-C (40/75/130 W) and Signal UV-C (40/75/130 W)
• Xpose UV-C 42 W and Xpert Duplex UV-C (80/140 W)
• ProfiHeater 1/2/3 kW

Pairs with

• End caps: F990107 (32 mm ABS black), F990113 (32 mm ABS blue)
• Retaining nut: B290010 (70 × 33.5 mm ABS blue)
• Quartz sleeve O-rings (separate set): E800912 (3 pcs)

Installation tips

• Clean the groove and mating faces; remove scale and debris.
• Lightly lubricate with silicone grease (never petroleum-based) and seat without twisting.
• Hand-tighten the retaining nut evenly; leak-test after pressurising the line.

Specifications

• Reference: 3902110
• Material: EPDM
• Dimensions: 59.99 mm ID × 2.62 mm cross-section
• Application: End-cap sealing ring (lamp/quartz head)

Good to know

Renew end-cap O-rings whenever you replace the quartz sleeve or service the head. Fresh seals maintain UV performance and help prevent moisture ingress.