Davey - StarFlo Pump Barrel Union O-ring - 403127

Davey – StarFlo Pump Barrel Union O-ring (403127)

This is the genuine Davey replacement O-ring for the barrel union connections on Davey StarFlo pool and spa pumps. It forms the watertight seal between the barrel union nut and tail, preventing leaks at the pump’s inlet and outlet plumbing joints. Two O-rings are required per pump — one for each union connection.

Compatibility

Part 403127 is listed in the official Davey StarFlo spare parts schedule for the complete single-phase CE range (DSF150CE, DSF200CE, DSF250CE, DSF300CE, DSF420CE) and the three-phase CE variants (DSF3003FCE, DSF4203FCE). CE model variants are the versions distributed exclusively in Europe. Always cross-reference your pump’s model plate and spare parts diagram before ordering.

Why Genuine Matters

Barrel union O-rings are under constant hydraulic pressure and pool-chemical exposure. A genuine Davey part is manufactured to the exact profile and material specification of the original, ensuring a reliable, long-lasting seal. Non-genuine substitutes may differ slightly in cross-section or compound and can lead to persistent weeping leaks that are difficult to trace.

When to Replace

Replace this O-ring whenever you dismantle the barrel unions for pump servicing, if you notice water weeping from the union joint, or as preventive maintenance during an annual pump service. The barrel union design allows the pump to be disconnected and reconnected quickly, making O-ring replacement a straightforward task for a competent technician.