Zodiac Jandy LRZE/LRZM/LXi Bypass Spring (R0453900) onoffvalves and this Pleatco version uses

and this Pleatco version uses the PA200S reference with C-8420 cross reference support

Use the part number as the primary match point when confirming fit

Order by part number 474989 to help ensure the correct match

that kind of accuracy matters even more because the user expects every control to feel natural and dependable

This type of part is especially useful when future removal or inspection matters in the plumbing layout

Zodiac Jandy LRZE/LRZM/LXi Bypass Spring (R0453900) onoffvalves and this Pleatco version usesSupport proper bypass movement in compatible LRZE, LRZM, and LXi heaters with this replacement bypass spring. This spring works inside the heaters water bypass system, helping the assembly respond as flow conditions change. A weakened or corroded spring may contribute to poor bypass response, reduced heating consistency, or added stress on related heater parts. This replacement is a practical service component when rebuilding the bypass assembly or