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Jandy DEV Series - User Manual

Jandy DEV Series
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H0295200 Rev B
Installation and
Operation Manual
Jandy
Diatomaceous Earth
Pool Fil ters
DEV Series Fil ters
WARNING
FOR YOUR SAFETY - This product must be installed and serviced by a contractor who is licensed
and qualifi ed in pool equipment by the jurisdiction in which the product will be installed where such
state or local requirements exists. In the event no such state or local requirement exists, the installer
or maintainer must be a professional with suffi cient experience in pool equipment installation and
maintenance so that all of the instructions in this manual can be followed exactly. Before install-
ing this product, read and follow all warning notices and instructions that accompany this product.
Failure to follow warning notices and instructions may result in property damage, personal injury, or
death. Improper installation and/or operation can create dangerous high pres sure which can cause
product failure or also cause the filter lid to be blown off, possibly causing death, serious injury or
prop er ty damage. Improper installation and/or operation will void the warranty.
Installation and Operation Data

Table of Contents

Questions and Answers

  • C
    Chelsea ThomasJul 27, 2025
    How to fix low water flow in Jandy DEV?
    • C
      chernandezJul 27, 2025
      Low water flow in your Jandy Swimming Pool Filter can stem from several issues. The filter system strainer baskets might be dirty; check and clean the skimmer and pump baskets. Air leaks on the suction side of the pump could be the cause; inspect all connections between the pool intake and pump. Restrictions or blockages in the suction or return lines should be checked for debris or partially closed valves. Additionally, ensure the pool water level is above the pump inlet line, and that the pump is primed by filling it with water at the basket and replacing the lid. If the pump impeller vanes are blocked or the pump is operating under speed due to low voltage, a technician or electrician is required.
  • P
    Patrick HallAug 2, 2025
    Why Jandy DEV has short filter cycles?
    • B
      Bruce ContrerasAug 2, 2025
      Short filter cycles in your Jandy Swimming Pool Filter can be caused by algae clogging the filter, so check the disinfectant content. Incorrect water chemistry, such as pH, total alkalinity, and TDS, can also be a factor. Ensure strainer baskets are being used and are not broken; replace them if necessary. Check the pump performance, as the pump output might exceed the design flow rate of the filter. Ineffective cleaning may also be to blame, so clean or replace the filter grids per instructions.
  • D
    Donald RossAug 8, 2025
    What to do if Jandy DEV has high pressure on start-up?
    • C
      christinaberryAug 8, 2025
      High pressure on start-up in your Jandy Swimming Pool Filter can be due to a small eyeball fitting in the Pool/Spa, which you should replace with a larger diameter fitting. A partially closed valve on the return line can also cause this; check and fully open all valves on the return line. The pump might be too large, so check the pump and filter selection. Dirty filter grids can also contribute; clean the filter grids per instructions.
  • V
    victoria35Aug 14, 2025
    Why is the water not clear in my Jandy DEV?
    • B
      bradley41Aug 14, 2025
      If the water in your Jandy Swimming Pool Filter isn't clear, it could be due to several reasons. The disinfectant level might be insufficient, so check and adjust it. The pool chemistry might be incorrect, requiring you to test and adjust it. Heavy use or dirt loads may necessitate adjusting the filter time or water chemistry. Insufficient running times can be resolved by increasing pump run time. A dirty filter needs backwashing according to instructions, and a hole in the filter element requires replacing the filter grids.
  • M
    maureen53Aug 21, 2025
    Why does dirt return to pool from Jandy Swimming Pool Filter?
    • M
      Martha BaileyAug 21, 2025
      If dirt returns to the pool from your Jandy Swimming Pool Filter, it could be due to a hole in the filter grid fabric, requiring you to replace the filter grid per instructions. A worn o-ring seal inside the filter might also be the cause, so replace the o-ring. Alternatively, a cracked manifold could be the issue, in which case you should replace the manifold assembly.

Summary

Safety Information

Important Safety Warnings

Critical warnings about pressure, air, and system connections to prevent injury or death.

General Safety Instructions

Guidelines for installers and owners on safe operation and maintenance of the equipment.

General Product Information

Introduction to the Manual

Overview of the manual's purpose and contact details for technical assistance.

Filter Operation Description

Explains water flow and the role of Diatomaceous Earth (DE) in the filtration process.

Installation Prerequisites

Requirements for filter placement, mounting, and protection from environmental factors.

Technical Specifications and DE Requirements

Details DE quantity needed and the technical specifications/dimensions of the filters.

Installation Procedures

Selecting the Filter Location

Criteria for choosing a suitable and safe installation site for the filter unit.

Anchor Bracket Installation

Steps for securely fastening the filter to the equipment pad using anchor brackets.

Preparing the Filter for Installation

Procedures for checking the filter carton, removing accessories, and inspecting parts.

Plumbing and Connections

Filter Plumbing Installation

Guidance on connecting pipes to the filter, including safety precautions and valve placement.

Filter Assembly and Clamping

DEV Series Clamp Installation

Detailed steps and critical warnings for correctly installing the filter tank clamp for a secure seal.

System Start-Up

Preparing Diatomaceous Earth (DE)

Explains the necessity of DE and provides instructions for its preparation as a slurry.

Filter Operation and Valve Control

Coating Filter Grids with DE

Guide on applying the DE slurry to the filter grids for optimal filtration efficiency.

New Pool and Seasonal Start-Up

Comprehensive steps for initiating the filter system operation after installation or seasonal shutdown.

Diverter Valve Operation Explained

Explanation of the functions associated with different diverter valve handle positions for water flow control.

Filter Maintenance: Disassembly and Assembly

Filter Tank Disassembly and Assembly

Step-by-step instructions for taking apart and putting back together the filter tank.

Filter Grid Disassembly and Assembly

Procedures for removing, cleaning, and reassembling the internal filter grids.

Routine Filter Maintenance

General Filter Care and Inspection

Routine cleaning, inspection of components, and leak checks for the filter system.

Performing Filter Backwashing

Detailed guide on reversing water flow to clean the filter grids and remove debris.

Cleaning Filter Grids with Water

Instructions for flushing filter grids using a garden hose to remove contaminants.

Advanced Filter Maintenance and Winterizing

Cleaning Filter Grids with Muriatic Acid

Instructions and safety precautions for using muriatic acid to descale filter grids.

Winterizing the Pool Filter System

Steps to prepare the filter for cold weather storage to prevent damage from freezing.

Troubleshooting Common Issues

Parts and Diagrams

Jandy DEV Filter Parts List

A comprehensive list of all replacement parts with key numbers and part identification.

Exploded View of Jandy DEV Filter

A detailed visual diagram illustrating the assembly of the filter components.

Filter Performance Data

Design Head Loss Curves

Graphs illustrating design head loss versus flow rate for DEV48 and DEV60 filter models.

Jandy DEV Series Specifications

General IconGeneral
Series NameDEV Series
CategorySwimming Pool Filter
ManufacturerJandy
Maximum Working Pressure50 psi
Available ModelsDEV48, DEV60
Filtration Area (sq. ft.)48, 60
Maximum Flow Rate (GPM)120
Inlet/Outlet Size2"
Waste Line Size1.5 inch

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