Pentair Standpipe Assembly for Cristal-Flo II & Sand Dollar SD60 — 25-1/4" length fits 22" tanks, OEM fit

Replacement standpipe assembly engineered for Pentair Sta-Rite Cristal-Flo II 22" high-rate sand filters and compatible with Pentair Sand Dollar SD60 models — 25-1/4" overall length.

This standpipe assembly is the internal tank piping designed to fit 22-inch pool and spa sand filter tanks from Pentair’s CristalFlo II line and the Sand Dollar SD60. It provides the internal flow path for filtration and backwash cycles, mounting inside the filter tank and connecting to the laterals or hub system. The 25-1/4" overall length ensures correct reach from the top opening to the filter’s internal distribution components for the specified tank size.

How do I know this standpipe fits my Cristal-Flo II or SD60 filter?

Measure the tank diameter and the required internal piping length of your existing assembly. This part is intended for 22-inch CristalFlo II high-rate tanks and Sand Dollar SD60 blow-molded tanks; if your tank is that size, the standpipe’s 25-1/4" length is built to align with the internal lateral/hub height.

• Designed for 22" tank diameter models.
• 25-1/4" overall length to match internal distribution height.
• Compatible with CristalFlo II and Sand Dollar SD60 specific mounting geometry.

What does this standpipe assembly do inside the filter tank?

The standpipe routes water between the multiport valve and the filter’s internal lateral or hub network, enabling normal filtration and backwash flows. It helps maintain correct flow paths so sand or media remain trapped while filtered water exits the tank through the valve connection.

• Provides internal conduit for filtrate and backwash flow.
• Positions correctly to interface with laterals or a hub.
• Helps prevent media from entering the valve during operation.

Can I install this standpipe myself, and what should I check during replacement?

Many technically inclined pool owners or technicians can replace the standpipe with basic tools, but follow safety steps: depressurize the system, remove the tank lid or valve, and lift out the old assembly. Inspect the laterals/hub for damage, ensure seals and O-rings are intact, and verify the standpipe seats squarely in the hub before reassembling.

• Always release pressure and drain the tank first.
• Check lateral ends and hub for cracks or wear during replacement.
• Confirm the standpipe alignment and seal before reattaching the valve.

What materials and build details should I expect from this Pentair part?

As a replacement factory part for Pentair/Sta-Rite systems, the standpipe is molded to match original equipment dimensions and connection points for the listed models. It’s shaped to fit the internal layout of a 22" CristalFlo II or SD60 tank and to interface with the original laterals or hub assembly.

• Molded to OEM dimensions for correct fit.
• Shaped to interface with Pentair laterals or hub.
• Supplied as a single-piece internal piping assembly.

Who is this for: This standpipe assembly is for pool professionals, repair technicians, and do-it-yourself owners who maintain Pentair Sta-Rite Cristal-Flo II 22" high-rate sand filters or Sand Dollar SD60 tanks. Choose this part when your existing internal piping is cracked, obstructed, or misaligned and when you need a direct replacement that restores proper filtration and backwash function without modifying the tank or valve.