Hayward Star-Clear Plus Filter Locking Knob E-Ring Retaining Clip CX900J
Hayward Products
SKU: CX900J
Hayward Star-Clear Plus Filter E-Ring Retaining Clip | CX900J
The Hayward CX900J E-Ring Retaining Clip is a genuine OEM replacement part designed for compatible Hayward Star-Clear Plus cartridge pool filters. This small retaining clip is used in the filter's locking knob assembly to help secure the mechanism during filter maintenance.
If the original E-ring becomes worn, bent, broken, or missing, replacing it can help restore proper operation of the filter head locking knob assembly.
Product Features
- Genuine Hayward OEM: Original manufacturer replacement retaining clip.
- Star-Clear Plus Compatibility: Designed for compatible Hayward single-cartridge filters.
- Locking Knob Component: Helps retain the filter head locking mechanism.
- Direct Replacement: Replaces original Hayward part number CX900J.
- Small Service Part: Allows replacement of a damaged retaining clip without purchasing the complete filter head.
- Individual Component: Sold as one E-ring.
Product Specifications
- Manufacturer: Hayward Pool Products
- Manufacturer Part Number: CX900J
- Distributor Part Number: HAY-051-1466
- Product Type: E-Ring Retaining Clip
- Filter Series: Hayward Star-Clear Plus
- Application: Filter Head Locking Knob Assembly
- Parts Diagram Reference: #4
- Quantity Required Per Filter: 1
- Package Quantity: 1 E-Ring
Compatible Hayward Cartridge Filters
Hayward CX900J is identified in the manufacturer's Star-Clear Plus parts diagrams for compatible models in the following series:
- Hayward Star-Clear Plus C751 Series
- Hayward Star-Clear Plus C900 Series
- Hayward Star-Clear Plus C1200 Series
- Hayward Star-Clear Plus C1502 Series
- Hayward Star-Clear Plus C1750 Series
- Hayward Star-Clear Plus C2002 Series
Compatibility Notice: Verify the exact filter model and locking knob configuration against the Hayward replacement parts diagram before ordering.
What Does the CX900J E-Ring Do?
The Star-Clear Plus filter uses a locking knob mechanism to secure and release the filter head during cartridge cleaning and maintenance.
The CX900J E-ring is a retaining component within that mechanism. It helps keep the associated parts properly positioned as the locking knob is operated.
A missing or broken E-ring may prevent the locking knob from functioning correctly when attempting to remove the filter head.
When to Replace the E-Ring
Inspect the retaining clip if:
- The original E-ring is broken or missing.
- The retaining clip is bent or damaged.
- The locking knob does not operate correctly.
- The filter head does not release as expected.
- Damage is discovered while servicing the locking knob assembly.
Inspect the associated locking knob, washers, and other retaining components for wear or damage.
Related Hayward Star-Clear Plus Replacement Parts
Complete your filter repair with related products available from Aqua Pool Supply.
- Hayward CX900G – Star-Clear Plus Locking Knob – Genuine replacement locking knob for compatible Star-Clear Plus cartridge filters.
- Hayward CX900H – Locking Knob O-Ring – Search for the replacement O-ring used in the locking knob assembly.
- Hayward CX900W – Locking Knob Washer – Search for replacement washers used in compatible filter assemblies.
- Hayward CX900D – Filter Guide Cone – Search for the guide cone used in compatible Star-Clear Plus filters.
Hayward Filter Parts Diagrams
Need additional replacement components? Visit our Pool Equipment Parts & Diagrams page and select Hayward cartridge filters to identify the correct part for your model.
Installation and Maintenance
- Turn off the pool circulation pump and disable automatic startup.
- Open the manual air relief valve and completely relieve filter pressure.
- Verify the pressure gauge reads zero before servicing.
- Follow Hayward's instructions for accessing the locking knob assembly.
- Remove the damaged E-ring using appropriate tools.
- Inspect the locking knob and associated washers for damage.
- Install the replacement CX900J retaining clip in the correct position.
- Verify the clip is fully seated and the mechanism operates correctly.
- Reassemble the filter according to Hayward's instructions.
Safety: Never attempt to loosen or remove a pool filter head while the system is pressurized. Filter components can separate violently if the manufacturer's pressure relief and assembly procedures are not followed.
Package Contents
Includes: One (1) Genuine Hayward CX900J E-Ring Retaining Clip.
Not Included: Locking knob, washers, O-rings, guide cone, filter head, or other replacement components.
Selling Quantity: One individual E-ring.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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