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Jandy DEL Series - User Manual

Jandy DEL Series
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H0238800B
Installation and
Operation
Manual
Jandy
®
Diatomaceous Earth
Pool Filters
DEL Series Filters
WARNING
Before installing this product, read and follow all warning notices and instructions that
accompany this filter. Failure to follow warning notices and instructions may result in
property damage, serious injury, or death.
Installation and Operating Data
FOR YOUR SAFETY - This product must be installed and serviced by a professional
pool/spa service technician. The procedures in this manual must be followed exactly.
Improper installation and/or operation can create dangerous high pressure which can
cause the filter lid to be blown off, possibly causing death, serious injury or property
damage. Improper installation and/or operation will void the warranty.

Table of Contents

Questions and Answers

  • M
    meredith48Aug 1, 2025
    How to fix low water flow in my Jandy DEL Swimming Pool Filter?
    • E
      Erica ColemanAug 1, 2025
      Low water flow in your Jandy Swimming Pool Filter can stem from several issues. Start by checking and cleaning the skimmer and pump baskets, as they might be dirty. Inspect all connections between the pool intake and pump for air leaks. Also, check all lines for debris or partially closed valves that could be causing restrictions. If the filter grids are the problem, clean or replace them as instructed. Ensure the pool water level is above the pump inlet line. Prime the pump 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.
  • C
    Christopher CooperAug 7, 2025
    How to stop dirt from returning to the pool from my Jandy DEL Swimming Pool Filter?
    • G
      gmasonAug 7, 2025
      If dirt returns to the pool when using your Jandy Swimming Pool Filter, it could be due to a hole in the filter grid fabric, in which case you should replace the filter grid as instructed. It may also be caused by a worn o-ring seal inside the filter, so replacing the o-ring might be necessary.
  • M
    Michael BakerAug 13, 2025
    Why is the water not clear in my Jandy DEL?
    • S
      Scott NguyenAug 13, 2025
      If the water in your pool isn't clear, it could be due to several reasons. First, check and adjust the disinfectant level. Also, test and adjust the water chemistry to ensure it's properly balanced. Heavy use or dirt can also affect water clarity, so adjust the filter time or water chemistry accordingly. Insufficient running times can be a factor, so increase the pump run time. A dirty filter can cause this issue, so backwash the filter as instructed. Lastly, inspect the filter grids for any holes and replace them if necessary.
  • E
    Edward DouglasAug 19, 2025
    What to do if my Jandy DEL Swimming Pool Filter has short filter cycles?
    • B
      Bryan GordonSep 12, 2025
      Short filter cycles in your Jandy Swimming Pool Filter can be caused by a few things. Algae clogging the filter is a common culprit, so check the disinfectant content. Incorrect water chemistry can also lead to this issue, so check the pH, total alkalinity, and TDS. Make sure strainer baskets are being used and are not broken; replace them if necessary. The pump output might exceed the design flow rate of the filter, so check the pump performance. Ineffective cleaning of the filter grids can also cause short cycles, so clean or replace them as instructed.
  • M
    michellelewisAug 25, 2025
    Why is there high pressure on start-up with my Jandy DEL Swimming Pool Filter?
    • T
      tbakerAug 26, 2025
      High pressure on start-up in your Jandy Swimming Pool Filter can be due to a few reasons. A small eyeball fitting in the pool or spa can cause this, so replace it with a larger diameter fitting. Check and fully open all valves on the return line, as a partially closed valve can increase pressure. Also, the pump might be too large for the filter, so check the pump and filter selection. Lastly, dirty filter grids can contribute to high pressure, so clean them as instructed.

Summary

SECTION 1. Safety Information

1.1 Important Safety Warning

Crucial warnings about operating pressure and potential hazards.

1.2 General Safety Instructions

Guidelines for installers and owners on safe use and servicing.

SECTION 2. General Information

2.1 Introduction

Overview of the manual's purpose and scope for DEL Series Filters.

2.2 Description

Details how water flows through the filter and the DE collection process.

2.3 General Requirements

Site selection and preparation requirements for optimal filter performance.

2.4 DE Requirements

Guidance on selecting and using Diatomaceous Earth (DE) for filtration.

2.5 Specifications and Dimensions

Provides filter specifications, flow rates, pressure limits, and physical dimensions.

SECTION 3. Installation Instructions

3.1 Filter Location

Guidance on selecting a suitable and safe location for filter installation.

3.2 Filter Preparation

Steps for unpacking, inspecting, and preparing the filter for installation.

3.3 Filter Installation

Detailed steps for positioning the filter and connecting plumbing components.

3.4 Clamp Installation, DEL Series

Instructions for correctly installing the filter tank clamp to prevent leaks and blow-offs.

SECTION 4. Start-up and Operation

4.1 Preparing Diatomaceous Earth

Procedures for preparing the DE slurry for initial filter coating.

4.2 Coating the Filter Grids

How to apply the DE slurry to the filter grids for efficient filtering.

4.3 New Pool and Seasonal Start-Up

Step-by-step guide for starting the filter system after installation or seasonal closure.

4.4 Valve Operation

Explanation of the different positions and functions of the multiport valve.

SECTION 5. Filter Disassembly;Assembly

5.1 Filter Tank Disassembly;Assembly

Procedures for taking apart and reassembling the main filter tank components.

5.2 Filter Grid Disassembly;Assembly

Steps for removing, cleaning, and reinstalling the filter grids.

SECTION 6. Maintenance

6.1 General Maintenance

General practices for keeping the filter in good working order.

6.2 Backwashing

Instructions on how to reverse water flow to clean the filter grids.

6.3 Pressure Gauge

Guidance on checking and maintaining the filter's pressure gauge.

6.4 Cleaning Filter Grids with Water

Method for cleaning filter grids using only water.

6.5 Cleaning Filter Grids with Muriatic Acid

Procedure for cleaning filter grids with acid to remove mineral deposits.

SECTION 7. Winterizing

7.1 Winterizing

Steps to prepare the filter system for winter to prevent damage.

SECTION 8. Troubleshooting

8.1 Troubleshooting

Common issues and their solutions for filter operation and performance.

SECTION 9. Exploded View and Parts List

9.1 Jandy DEL Filters Parts List

A list of all available parts for the Jandy DEL Series filters with part numbers.

9.2 Jandy DEL Filters Exploded View

An illustrated diagram showing the assembly of the Jandy DEL Series filter.

Limited Warranty

Exclusions

Conditions under which the product warranty is not valid.

Limitation of Liability

States the extent of the manufacturer's responsibility for product defects.

Warranty Claims

How to initiate and process a warranty claim for defective parts.

Jandy DEL Series Specifications

General IconGeneral
BrandJandy
ModelDEL Series
CategorySwimming Pool Filter
LanguageEnglish

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