By Pentair Pool Products



Model # 144296

Alternate Part #'s PEN144296

Availability Please allow 3 - 4 months for delivery

Product Description

The THS Filter is an NSF-approved 50 psi rated tank with flow rates up to 535 gallons per minute. The filter shell is manufactured from a unique and lasting composite laminate design that makes winding unnecessary. Paracote ® , a waterbased, environmentallyfriendly coating, provides remarkable surface protection.


  • Five sizes to 27 sq. ft.
  • Manway in front for easy access and smaller footprint
  • Manway with viewport available as option
  • 6 in. flanged connections, 4 in. victaulic on the THS 3461
  • Optional manual, semi-automatic, and automatic backwash systems for one and two tank systems
  • Lateral V-slots for self-cleaning
  • Influent manifold distribution to prevent clogging
  • NSF approved from 5-20 gpm/sq. ft.




  • Construction:
    • Mult-layer engineered fiberglass crafted of chopped glass and directional roving in an isopthalic polyester matrix.
  • Operating Pressure:
    • Capable of withstanding 50 PSI internal pressure.

Tank Base:

  • Support Bases:
    • Tanks feature ABS saddle style support bases for filter body, capable of rotation for leveling purposes.


  • Headers:
    • One influent header is fitted with sufficient distributors to properly distribute incoming flow evenly across the sand bed surface. An additional effluent header is supplied with sufficient laterals equally distributed not less than 12 inches below the filtering sand bed.
    • Laterals are 2-3/8" x 10" with 2" NPT connections and constructed of ABS plastic with molded 'V'-groove slots.

Operation / Performance:

  • Flow Rate
    • NSF Listed for 5 to 20 GPM per square foot of filter area.
  • Maximum Limits
    • Working pressure 50 PSI max. Continuous Water temperature 125° F.
  • Sand Media
    • #20 white quartz silica sand. Effective size 0.45-0.55mm.
  • Safety provisions
    • Each tank features an automatic and manual air release system fabricated of non-corrosive materials.

Product              Description
156400               Single THS semi-automatic controller 6 in. FP
156450               Dual THS semi-automatic controller 6 in. FP
156800               Dual THS autobackwash controller
156850               Single THS autobackwash controller

Products           Description
140325              Adder kit for third THS Filter 2
156100              Temperature probe kit 4
156150              Flowmaster saddle kit 4
155700              Kit-THS3461, single tank manifold, with diaphragm valve kit
155702              THS single tank manifold kit with butterfly valves 3
155720              Dual 34 in. dia. 6 in. FP kit with diaphragm valves
155722              Kit-THS3461, single tank manifold, with butterfly valve kit 3
155701              Kit-THS3461, dual tank manifold, with diaphragm valve kit

Model                 Description
155703              Kit-THS3461, single tank manifold, with diaphragm valve kit
155721              THS dual 34 in. dia. 6 in. FP kit with diaphragm valves
155723              Kit-THS3461, dual tank manifold, with diaphragm valve kit
155730              THS dual 42 in. dia. 6 in FP Kit with diaphragm valves
155800              WA-KIT wedge anchor kit 1
155850              BVA-KIT 1/2 in. ball valve adapter kit for manual air relief 1
155705              Manway with Viewport upgrade
155706              Manway with Viewport Retrofit Kit

Click here for Product Brochure

Product Specifications

THS4296 - 144296
42 in. x 96 in.
Filtration Area:
26.7 sq. ft.
Flow Rating:
400 GPM
Sand Required:
3,500 lbs.
Turnover 8 Hrs.:
192,000 gal.
Turnover 10 Hrs.:
240,000 gal.

?     Asked on 2/3/2017by Steve

Pentair Sand Filter THS4296. How often is sand replacement necessary? Can you email me an O&M manual?

A  Answered on 2/3/2017 by InyoPools Product Specialist Lennox H.

Hi, Steve. You would normally replace the sand when you start experiencing poor circulation and or poor water clarity. Here is the link to the THS Series® High Rate Sand Filter Installation & User's Guide.

?     Asked on 8/28/2018by Inyo Visitor

The specification notes say 400 GPM while the description on the main page says up to 525 GPM. Which number is accurate?

A  Answered on 8/29/2018 by InyoPools Product Specialist Lennox H.

Hi, The flow rate of this model filter is 400 GPM. 


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