#1 Pressure gauge
OEM part number: 190058z
Model and source notes
FNS Plus FNSP48 is not an approved identity for legacy FNS 48. Keep Rev A cast-clamp and Rev K spring-clamp callouts separate. Spring clamps and kits are restricted to filters manufactured before August 2025; unknown or August-2025 boundary units require manufacturer review. Do not infer a retrofit, lid interchange, suffix equivalence or supersession. Models: FNSP48. FNS Plus FNSP48 only; confirm installed generation and physical configuration. Source-edition listing, not a universal old/new replacement. Printed page 12; diagram position 1. No quantity inferred from drawing; no suffix equivalence. Source: FNS Plus Vertical Grid D.E. Filter Installation and User’s Guide · 198104 · REV. A 6/10/25 · 16 · 12 · https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/filters/fns-plus/manual/fns-plus-install-guide-2025.pdf#page=16.
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