Struc Univ Poly 40 Gal. Ret Tnk, 21x32

The Structural Universal Poly 40-Gallon Squat Retention Tank (UT40-SQ) from Pentair Flow Technologies provides essential contact-time capacity for chemical feed and disinfection systems in a space-saving 21" x 32" squat profile. Retention tanks are a key element of treatment processes that require water to remain in contact with a chemical or oxidant for a set period before reaching the home, and this tank supplies that dwell volume in a compact footprint.

In many water treatment applications, such as chlorination for disinfection or the oxidation of iron, manganese, and hydrogen sulfide, the treatment chemical needs adequate dwell time to react fully with the water. Inject too little contact time and the reaction is incomplete, leaving contaminants only partly treated. A retention tank provides that crucial contact time, holding the water as the reaction completes so the downstream filter or system can finish the job effectively and deliver fully treated water.

Built for Contact-Time Applications

• 40-gallon capacity for ample contact and retention time
• Space-saving squat 21" x 32" profile fits tight installations
• Durable Structural Fibers polyethylene construction
• Ideal companion to chemical feed and disinfection systems
• Supports oxidation and chlorination reaction completion
• Lightweight 31 lb tank for manageable handling and setup

The squat design is particularly valuable where vertical clearance is limited, delivering substantial 40-gallon capacity without requiring a tall installation footprint. That makes it a smart fit for basements with low ceilings, crawl spaces, and compact equipment rooms where a tall retention tank simply would not fit. Its rugged polyethylene construction from Structural Fibers stands up to the demands of chemical feed environments while resisting the corrosion that would attack metal tanks exposed to chlorine and oxidizers.

Whether you are building out a chlorination system to disinfect a private well, an iron-oxidation setup to clear rusty or staining water, or another process that depends on reaction time, the Pentair UT40-SQ retention tank supplies the dwell volume that makes the treatment chemistry work. Paired with the appropriate chemical feed pump upstream and downstream filtration to remove the oxidized contaminants, it helps ensure the chemistry has the time it needs to do its job, delivering cleaner, safer water to the household reliably and efficiently.