Product Overview

The Pentair THS Series THS3461 Horizontal Sand Filter is a high-performance commercial filtration solution designed for commercial swimming pools and other demanding water applications. Built with a durable multi-layer engineered fiberglass tank, the THS3461 provides excellent corrosion resistance, reliable filtration, and long service life.

Pentair rates the THS Series tank for up to 50 PSI working pressure, and the THS3461 provides 13.5 sq. ft. of filtration area with flow rates up to 270 GPM at 20 GPM per square foot. Its 34-inch diameter design is compact enough to fit through a standard doorway, making installation and equipment-room access easier.

Key Features

Commercial-Grade Horizontal Design: Designed specifically for commercial pools and water applications where dependable high-capacity filtration is required.

13.5 Sq. Ft. Filtration Area: The THS3461 provides 13.5 square feet of effective filter area and supports flow rates of 135 GPM at 10 GPM/sq. ft., 203 GPM at 15 GPM/sq. ft., and up to 270 GPM at 20 GPM/sq. ft.

Durable Fiberglass Construction: The tank is manufactured from multi-layer engineered fiberglass using chopped glass and directional roving in an isophthalic polyester matrix for strength and corrosion resistance.

50 PSI Maximum Working Pressure: Engineered to withstand up to 50 PSI of internal pressure for demanding commercial filtration systems.

Front-Access Manway: A front-mounted manway provides easier service access while helping reduce the required installation footprint.

Fits Through Standard Doorways: The 34-inch-diameter THS tank is specifically designed to fit through standard doorways, which can simplify installation in existing mechanical rooms.

Efficient Internal Water Distribution: An influent header and internal distributors spread incoming water evenly across the sand bed, while the effluent header and laterals collect filtered water efficiently.

Multiple Backwash Options: Compatible with optional manual, semi-automatic, and fully automatic backwash systems for flexible commercial system design.

Benefits

High-capacity commercial pool filtration

Corrosion-resistant fiberglass construction

Compact horizontal configuration

Up to 270 GPM flow rate for the THS3461

NSF-listed commercial filtration design

Front access for easier maintenance

Accessible tank drain

Adjustable saddle-style supports for leveling

Compatible with several Pentair backwash configurations

Specifications

Pentair's published dimensional and media table confirms the THS3461 filtration area, flow rates, media quantities, operating weight, shipping weight, and dimensions.

Warranty & Compatibility

Installation Information

The THS3461 is intended for commercial filtration systems and should be installed by qualified commercial pool professionals in accordance with applicable codes and Pentair installation instructions.

The filter requires approximately 1,250 lbs. of sand and 300 lbs. of gravel, for approximately 1,550 lbs. of total filtration media. Filter media, external plumbing, backwash controls, valves, and related accessories should not be assumed to be included unless specifically stated in the product offering.

Pentair offers compatible THS3461 single- and dual-tank manifold kits with either butterfly or diaphragm valves.

Confirm Before Ordering

Please confirm the following before placing your order:

• Pentair part number 143461
• Model THS3461
• Required flow rate and filtration area
• Available equipment-room dimensions
• Required backwash configuration
• Required manifold and valve package
• Sand and gravel media requirements

Commercial filtration equipment may require additional components that are sold separately.

Warranty Information

Pentair's published THS engineering specifications state that the filter vessel carries a 10-year limited warranty against defects in material and workmanship, with the first three years non-prorated. Warranty eligibility and coverage are subject to Pentair's current terms, proper installation, operation, and application requirements.

Customer-Facing Q&A

Q: What is the maximum flow rate of the Pentair THS3461?
A: The THS3461 is rated for up to 270 GPM at 20 GPM per square foot of filter area.

Q: How much filtration area does this filter provide?
A: It provides 13.5 square feet of filtration area.

Q: How much sand does the THS3461 require?
A: Pentair specifies approximately 12.5 cubic feet or 1,250 lbs. of sand, plus approximately 300 lbs. of gravel.

Q: Does the filter include the backwash valve system?
A: Pentair lists separate manifold and valve kits for the THS3461, so the required backwash and face-piping configuration should be confirmed before ordering.

Q: Will this filter fit through a standard doorway?
A: Yes. Pentair specifically states that its 34-inch-diameter THS tanks are designed to fit through standard doorways.

Q: What is the maximum operating pressure?
A: The tank is rated for a maximum working pressure of 50 PSI.