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Engineered for performance and built to last, the Clack RT120 Retention Tank is the ideal solution for both residential and commercial water treatment systems. With its 120-gallon fiberglass construction, this tank ensures reliable, long-term performance in even the most demanding well water applications.
Designed for easy installation and exceptional durability, the RT120 enhances the effectiveness of your filtration system by providing critical contact time for chemical treatment, sediment settling, or aeration. Whether you're upgrading your home system or improving operational efficiency for your business, this tank delivers consistent, clean, and treated water—without the headaches.

| Max Inlet Pressure | 80 PSI |
| Max Working Pressure | 315 PSI |
| Max Suction Lift | 15 Feet |
| Temperature Limit | Up to 140°F (Prolonged use not recommended) |
| Fitting Kit | 1-1/4" x 1-1/2" PVC Solvent Straight Fitting |
| Male NPT Fittings | (2) 1-1/4" Plastic Straight |
| Bypass | Included |
| Drain Size | 1" Blow Down |
| Baffle Diffuser | Included |
| Outer Construction | Grey Fiberglass w/Epoxy Resin |


Lifetime Coverage with No Expiration
Every qualifying purchase comes with a unique replacement parts code, valid for life with no expiration or renewal needed.
Simple, Hassle-Free Process
If a part wears out or needs replacing, just follow these easy steps:
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Don’t see the part you need? No problem — just email us at [email protected] or call (800) 374-2143, and we’ll make sure you’re taken care of.
Covers All Major Components
Self-Service Ordering
Ships within 48 hours · Estimated delivery Jun 21 - Jun 26
US$40
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