This is the genuine Starway replacement seal piston for the Starway motorized 5-way automatic backwash valve in the 50 mm (DN50) version. The seal piston is the core sliding component inside the valve body, responsible for creating a watertight seal as the valve cycles between filtration and backwash positions. Replacing a worn or damaged seal piston restores leak-free valve operation and protects your filtration system’s performance.<\/p>\n
This seal piston is designed exclusively for the Starway motorized 5-way PVC automatic backwash valve in the 50 mm pipe connection size. It is not interchangeable with the 63 mm Starway valve variant. Always confirm your valve’s connection diameter before ordering to ensure a correct fit.<\/p>\n
The Starway backwash valve operates at up to 2 bar and relies on precise tolerances between the piston and valve bore to maintain a watertight seal. A genuine Starway seal piston is dimensioned and manufactured to the original specification, ensuring proper sealing performance, correct actuator travel, and long service life in chlorinated pool water environments.<\/p>\n
Installation should be carried out by a qualified pool technician. The pool circulation pump must be switched off and the system depressurised before disassembly. Inspect the valve bore for scoring or damage before fitting the new piston, and use only silicone-based lubricant on the seal surfaces to avoid degradation of the sealing material.<\/p>","protected":false},"excerpt":{"rendered":"