This is the genuine Fluidra replacement union nut for the 3-piece pipe union assembly, sized for D63\/75 mm pipework. It forms the threaded locking collar that holds the two union halves together, enabling a secure yet fully demountable pipe connection on your pool filtration system. It is a direct OEM spare for the Fluidra \u00d8900 sand filter rated at 30,000 l\/h with a 2\u00bd” port (valve-free version).<\/p>\n
This union nut is designed specifically for use with the Fluidra \u00d8900 \/ 30,000 l\/h 2\u00bd” sand filter assembly (without valve). It is sized for D63\/75 mm PVC pipework, which is standard on large-format residential and semi-commercial pool filtration installations. Always verify your existing union body diameter before ordering to ensure a correct fit.<\/p>\n
A genuine Fluidra union nut ensures precise thread tolerances and PVC material grade that match the original union body, delivering a leak-free seal without the need for PTFE tape between the nut and union end. Off-brand alternatives may have slightly different thread pitches or thinner walls, increasing the risk of cross-threading or joint failure under sustained pump pressure. Sourcing OEM ensures long-term reliability and pool-safe materials.<\/p>\n
The union nut should be tightened by hand in most cases; however, for larger diameters such as D75, a strap wrench may be needed to achieve a proper seal without over-stressing the fitting. No solvent cement or PTFE tape is required at the nut-to-union interface \u2014 the integrated O-ring in the union body provides the seal. Ensure pipework is properly aligned before tightening, as these unions are not recommended where pipes are under bending stress.<\/p>","protected":false},"excerpt":{"rendered":"