Fluidra - Diffuser Support Tube Ø90 mm for Praga Sand Filter 1800

Fluidra – Diffuser Support Tube Ø90 mm for Praga Sand Filter 1800

This is the genuine Fluidra replacement diffuser support tube (Ø90 mm) designed for the Praga bobbin-wound sand filter with an 1800 mm tank diameter. The support tube acts as the central standpipe that holds the diffuser assembly firmly in place inside the filter tank, ensuring incoming pool water is distributed evenly and consistently across the full sand bed for effective filtration. Replacing a cracked or damaged support tube restores proper water distribution and protects filter performance.

Compatibility

This part is a direct OEM replacement specifically sized for the Fluidra AstralPool Praga sand filter range with a Ø1800 mm tank body and a Ø90 mm diffuser connection. The Praga series is a commercial-grade, bobbin-wound fibre-glass and polyester resin filter available in tank diameters from Ø1050 mm up to Ø3000 mm — always confirm your exact tank diameter and connection size before ordering, as diffuser support tubes vary by model.

Why genuine matters

The Praga filter’s internal diffuser components — including this support tube — are engineered to work together with the collector arms and diffuser head to withstand pressures of up to 2.5 or 4 kg/cm² and temperatures up to 50 °C. A genuine Fluidra part guarantees the correct dimensions, material grade, and pressure rating, preventing leaks or misalignment that can result in channelling through the filter media and reduced water quality.

Installation

The diffuser support tube is accessed by removing the filter lid and lifting out the diffuser assembly. No special tools are required, but the filter must be fully depressurised and drained before opening. Refit with care to ensure the tube seats correctly in the base socket, and check all surrounding seals for wear while the filter is open.