Pentair 190037 Outlet Standpipe Assembly (22-3/8″ Tall) for FNS Plus 60 Sq Ft D.E. Filter
The Pentair 190037 is an OEM outlet standpipe assembly used inside the Pentair/PacFab FNS Plus 60 sq ft vertical-grid D.E. filter (commonly referenced as FNSP60). The standpipe channels filtered water from the internal grid/manifold area to the outlet bulkhead, helping maintain proper flow and preventing internal bypass.
Key Details
- Part number: 190037
- Description: Outlet standpipe assembly
- Filter size: 60 sq ft FNS Plus
- Overall height (commonly listed): 22-3/8″ tall
- Location: Inside the filter tank (outlet/return path)
Common Compatibility (Verify Your Model)
- Pentair/PacFab FNS Plus vertical grid D.E. filter: 60 sq ft (commonly FNSP60)
Always confirm fit by matching your filter model number and the standpipe height/style shown on your parts diagram.
What This Part Does
- Directs filtered water from the internal assembly to the outlet connection
- Helps maintain correct internal flow routing and filtration performance
- Restores proper fit when the original standpipe is cracked, warped, or missing components
When to Replace
- Cracks, splits, or deformation in the standpipe body
- Poor internal fit after service (standpipe no longer seats correctly)
- Unexplained internal bypass symptoms after confirming grids/manifold and seals are in good condition
- Damage discovered during a rebuild or tank component replacement
Installation Notes
- Shut off the pump and relieve all pressure at the air relief before opening the filter.
- Remove the grid assembly as required to access the outlet standpipe.
- Inspect sealing surfaces and any related O-rings while the tank is open; replace worn seals as needed.
- Reassemble carefully so the standpipe seats squarely and does not bind.
- After restart, check for normal pressure/flow and confirm there are no internal leaks or abnormal behavior.
Related Products (Aqua Pool Supply)
- FNS Plus 60 Grid Elements (Search)
- FNS Plus Manifold / Internal Assemblies (Search)
- FNS Plus Air Relief / Gauge Parts (Search)
- FNS Plus Tank O-Ring / Seals (Search)
- D.E. Filter Powder (Search)
Maintenance Tips
- Always bleed air and confirm the pressure gauge reads zero before opening the filter.
- Record your clean starting pressure after each full cleaning to spot restrictions early.
- When the filter is open, inspect internal plastic parts for hairline cracks and stress marks to prevent mid-season failures.
- Use only pool-safe silicone lubricant on O-rings and seals; avoid over-lubrication that can trap debris.
