Description
Blue Lagoon O-ring NBR 56 × 3 mm – 3902041
Restore a watertight seal on your Blue Lagoon equipment with this original NBR O-ring (56 × 3 mm). It seals the housing-to-glass/quartz interface to prevent leaks and protect the UV-C or copper components. Available from PoolParthub.com.
Compatibility
Used in multiple Blue Lagoon systems that require a 56 × 3 mm seal, including:
- Blue Lagoon Copper Electrolyzer
- Blue Lagoon Tech Spa UV-C (housing/glass interface)
Also suitable wherever a 56 × 3 mm NBR O-ring is specified in Blue Lagoon housings.
What’s included
- 1 × O-ring NBR 56 × 3 mm (ref. 3902041)
Installation tips
- Clean grooves and glass/quartz surfaces before fitting; replace any damaged parts.
- Lightly lubricate with silicone grease (never petroleum-based) and avoid twisting the ring.
- Tighten evenly and leak-test after reassembly.
Specifications
- Reference: 3902041
- Material: NBR (nitrile rubber)
- Dimensions: 56 mm inner diameter × 3 mm cross-section
- Function: Housing-to-glass/quartz sealing ring
Good to know
For best results, renew O-rings whenever you replace the quartz sleeve or perform a full annual service. Keeping seals fresh maintains pressure integrity and UV performance.
