Unicel Replacement Filter Cartridge 50 sf Hayward CX500-RE | C-7656
Unicel
SKU: C-7656
Unicel C-7656 Replacement Cartridge Filter (50 sq ft)
Part # C-7656 — a premium replacement cartridge from Unicel engineered for in-ground pool and spa cartridge filter systems. This element provides 50 square feet of filtration media with durable pleat construction for reliable clarity and long service life.
Key Features
- 50 square feet of filtration area with 108 pleats for strong dirt-holding capacity.
- Constructed with high-quality polyester filtration media for durability and chemical resistance.
- Approximate dimensions: 19 5/8″ length × 7″ outer diameter.
- Both ends open with a 3″ inner diameter for easy drop-in installation.
- Replaces several OEM cartridges including models used in Hayward Star-Clear C500, Pentair Purex CF-50, and similar filter systems.
- Rigid core and pleat design help reduce pressure rise and extend cleaning intervals.
Typical Applications
This cartridge is ideal for residential and light commercial in-ground pools requiring a 50 sq ft replacement element. It is commonly used when the system begins to show reduced flow, higher pressure between cleanings, or when the existing cartridge becomes worn, flattened, or damaged.
Installation & Compatibility Notes
Turn off the pool pump and depressurize the filter before opening the housing. Remove the old cartridge and clean the inside of the filter tank. Insert the new Unicel C-7656 cartridge, ensuring it seats properly on the manifold. Inspect the tank O-ring and lid before reassembly. Restart circulation and check that system pressure is within normal operating range.
Why Choose This Cartridge?
The Unicel C-7656 provides reliable performance with high-efficiency filtration media and strong structural integrity. It helps maintain clear water, prolong equipment life, and reduce the frequency of cleanings thanks to its optimized pleat count and sturdy construction.
Maintenance Tips
- Rinse the cartridge every 4–6 weeks or when pressure increases 8–10 psi above the clean starting point.
- Use a gentle hose spray and clean between pleats; avoid high-pressure washers.
- Perform an annual deep cleaning by soaking in a cartridge cleaning solution to remove oils and fine debris.
- Inspect pleats, end caps, and the core regularly; replace the cartridge if pleats are torn, misshaped, or heavily stained.
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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