Starway - Automatic Backwash Valve Viton O-Ring 46.04 × 3.53 mm 90 Shore A - 7039424

Starway – Automatic Backwash Valve Viton O-Ring 46.04 × 3.53 mm 90 Shore A

This is the genuine Starway replacement O-ring for the Starway motorised 5-way automatic backwash valve. Manufactured in Viton (FKM/FPM) fluorocarbon rubber at 90 Shore A hardness, it restores the internal pressure seal that keeps pool water properly directed during filter cycles and backwash sequences.

Compatibilité

Designed specifically for the Starway automatic backwash valve range (Ø50 mm and Ø63 mm models). Always verify the O-ring position and reference against your valve’s spare parts diagram before ordering, as multiple O-ring sizes are used within the assembly.

Why Genuine Viton Matters

Viton (FKM) fluorocarbon rubber offers outstanding resistance to pool chemicals, chlorine, and elevated temperatures, with a service range from –20 °C up to approximately 200 °C. The 90 Shore A hardness rating provides the firm, consistent compression needed to maintain a leak-free seal under the valve’s operating pressure of up to 2 bar. Using a genuine Starway part ensures the exact dimensions and material specification are met — critical for a motorised valve where an incorrect seal can cause water leakage or pressure loss.

Installation

Replacement of internal valve O-rings requires the valve to be fully depressurised and electrically isolated before disassembly. Lightly lubricate the O-ring with a silicone-compatible grease before fitting and inspect the seating groove for any damage or debris. Maintenance and seal replacement should be carried out by qualified technical personnel.