PresAir Trol Sequencer [Solenoid Special A] (MSA325B) pleatco A paired cartridge arrangement like

A paired cartridge arrangement like this is useful because it refreshes both the inner and outer filtering elements together

The multiple cross-reference numbers give this cartridge practical value because filter service is most accurate when the replacement is matched to known application identifiers

A control box helps coordinate compatible spa outputs from a central platform

Supports a coordinated and visually balanced finished repair

The dual slip-or-spigot design gives this union practical value because plumbing layouts sometimes require flexibility at both ends while still preserving the convenience of a serviceable union connection

PresAir Trol Sequencer [Solenoid Special A] (MSA325B) pleatco A paired cartridge arrangement likePresAir Trol Sequencer [Solenoid Special A] (MSA325B) is a replacement solenoid sequencer component for compatible PresAir Trol electrical control systems. Sequencers help manage staged equipment functions, making this part useful when troubleshooting a compatible control setup that is not activating or progressing through functions properly. When working on pool and spa plumbing, valve, or electrical systems, matching the correct manufacturer part