Pentair THS Series 34" × 61" Horizontal Sand Filter
The Pentair THS Series 34" × 61" Horizontal Sand Filter is a high-capacity commercial horizontal sand filter with 4-inch Victaulic connections for streamlined commercial plumbing integration. The unique composite laminate shell with Paracote water-based coating provides long-lasting surface protection without winding. Front manway minimizes footprint depth. NSF/ANSI Standard 50 certified from 5–20 GPM per sq ft. Backed by a 10-year warranty — the longest in the THS lineup.
Requires 1,250 lb of sand and 300 lb of pea gravel (not included). Optional manual, semi-automatic, and automatic backwash systems available (CM200 and CS400 series).
Note: Filter sand (1,250 lb), pea gravel (300 lb), and backwash control system not included. Professional installation required. Freight shipping — contact us for a freight quote before ordering.
Key Features
10-Year Warranty
Longest warranty in the THS Series — exceptional confidence in long-term commercial durability.
4" Victaulic Connections
4-inch Victaulic grooved connections for fast, reliable commercial plumbing without flanges.
Horizontal Tank — Reduced Height Footprint
34-inch diameter horizontal design — ideal for equipment rooms with height restrictions. Front manway further reduces depth footprint.
Composite Laminate / Paracote Coating
No winding required — Paracote environmentally friendly coating for long-lasting surface protection.
Influent Manifold Distribution
Prevents clogging and ensures even distribution across the full sand bed.
NSF/ANSI 50 Certified
Approved 5–20 GPM per sq ft with 50 PSI max working pressure.
Specifications
Performance
| Filtration Area | 13.5 sq ft |
| Max Flow Rate | 535 GPM |
| Max Working Pressure | 50 PSI |
| Flow Rate Range | 5–20 GPM/sq ft (NSF approved) |
Filter Media
| Sand Required | 1,250 lb (not included) |
| Pea Gravel Required | 300 lb (not included) |
Tank & Plumbing
| Tank Design | Horizontal Composite Laminate |
| Tank Diameter | 34 in |
| Tank Length | 61 in |
| Connections | 4 in Victaulic (Grooved) |
| Manway | Front-Access (Viewport Optional) |
Physical
| Product Weight | 575 lb |
| Shipping Dimensions | 86 × 48.5 × 58 in |
Approvals & Warranty
| Certifications | ANSI Standard 50 / NSF Certified |
| Warranty | 10 Years |
What's in the Box
- Pentair THS Series 34" × 61" Horizontal Sand Filter Tank
- User Manual
Note: Filter sand (1,250 lb), pea gravel (300 lb), and backwash control system not included. Professional installation required.
Warranty
The Pentair THS Series 34" × 61" comes with a 10-year manufacturer warranty. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.
Downloads
- Install Guide (PDF)
- Operating Manual (PDF)
- Technical Manual (PDF)
- Technical Manual 2 (PDF)
- Warranty Document (PDF)
Frequently Asked Questions
How does the THS 34×61 compare to the THS 42×72?
Both are THS Series horizontal sand filters with composite laminate construction and front manway. The 34×61 has 13.5 sq ft of area and uses 4-inch Victaulic connections; the 42×72 has 19.7 sq ft and uses 6-inch flanged connections. Notably, the 34×61 carries a 10-year warranty vs. 2 years for the 42×72, and requires less sand (1,250 lb vs. 2,100 lb). Both are rated to 50 PSI max working pressure.