Description
B290010 – End-cap nut 70 × 33.5 mm (ABS, blue) for Blue Lagoon UV-C
Replace a worn or cracked end-cap nut with this genuine Blue Lagoon part in blue ABS. The B290010 nut secures the closing lid at the lamp/quartz end of the reactor body, restoring a clean, pressure-safe seal. Available from PoolParthub.com.
Compatibility
Fits Blue Lagoon UV-C housings that use the blue end-cap assembly, including:
- Timer UV-C 40 / 75 / 130 W
- Signal UV-C 40 / 75 / 130 W
- Xpert Duplex UV-C 80 / 140 W
- Xpose UV-C 42 W
Note: Not for Saltwater series (these typically use the black nut ref. 3901045).
What’s included
- 1 × End-cap nut 70 × 33.5 mm, ABS blue (ref. B290010)
Recommended accompanying parts
- Closing lid, black: F990196BU
- Quartz Glass Stabilizer kit: SP0095 / SP0073 (model-dependent)
- O-ring set for quartz glass: E800912 (3 pcs)
Installation & tips
- Disconnect power and depressurise. Inspect and clean sealing faces before fitting.
- Lightly grease O-rings with silicone grease; tighten the nut evenly by hand.
- Leak-test on restart; recheck after the first heating cycle.
Specifications
- Reference: B290010
- Function: End-cap retaining nut
- Dimensions: 70 mm × 33.5 mm
- Material: ABS, colour blue
- Series: Timer, Signal, Xpert Duplex, Xpose UV-C
Good to know
If the nut has been overtightened or UV-aged, also check the closing lid and O-rings. Replacing these together ensures long-term watertightness and easier seasonal servicing.
