When to Replace Hayward SwimClear Cartridge Elements
Quick Summary
- Replace when the clean starting pressure is more than 6 PSI above the original new-filter baseline — this is the Hayward-specified trigger.
- Always replace all cartridges in a set — replacing only one or two elements in a multi-cartridge filter causes uneven flow distribution and accelerates wear on the remaining new elements.
- Physical damage — torn pleats, separated end caps, or holes in the core — requires immediate replacement regardless of how the pressure is reading.
- Typical residential service life is 2–4 years with regular cleaning and proper chemistry.
The Hayward Pressure-Based Replacement Criterion
The SwimClear owner's manual provides a specific, measurable trigger for replacement. When you clean the cartridges and reinstall them, note the new clean starting pressure. If that clean starting pressure is more than 6 PSI above what it was with brand-new filter elements when the filter was first commissioned, Hayward says to replace the elements at the next red-arrow reading rather than continuing to clean.
This means you need to know the original baseline. If you are servicing a filter where no baseline was recorded, install new elements as the baseline reference and record that starting pressure immediately.
Physical Inspection Checklist
Pull the cartridges and check every element at each cleaning:
Pleat condition
- Good: Pleats are open and evenly spaced. The polyester fabric has a light texture and the pleats spring back somewhat when gently pushed together.
- Replace: Pleats are tightly compressed and do not open when wet. The fabric looks glazed, matted, or permanently deformed. Chemical soaking does not restore pleat definition.
End cap integrity
- Good: The plastic or rubber end caps are firmly bonded to the polyester media at both top and bottom.
- Replace immediately: Any gap or separation between the end cap and the media. This creates an open bypass path where unfiltered water passes directly through without any filtration.
Core and media tears
- Replace immediately: Any visible holes, tears, or splits in the polyester fabric or in the inner plastic core. Even small defects allow bypass.
General wear
- Significant reduction in media thickness compared to a new element of the same part number.
- Persistent staining that survives both degreaser and acid soaks — this material is embedded in the fabric and will not clear.
- Visible cracking or crazing of the plastic core from UV exposure or chemical attack.
Replacement Part Numbers by Model
| Model | Filter Area | Qty | Single Element | 4-Pack |
|---|---|---|---|---|
| C2030 | 225 sq ft | 4 | CX481XRE | CX481XREPAK4 |
| C3030 | 325 sq ft | 4 | CX580XRE | CX580XREPAK4 |
| C4030 | 425 sq ft | 4 | CX880XRE | CX880XREPAK4 |
| C5030 | 525 sq ft | 4 | CX1280XRE | CX1280XREPAK4 |
| C7030 | 680 sq ft | 8 | CX591XRE | CX591XREPAK4 (order 2) |
Always order from Hayward directly or through an authorized dealer to ensure genuine replacement elements. The manual specifies Hayward genuine replacement parts — aftermarket elements may differ in pleat count, media quality, or dimensional tolerances.
What to Check When Installing New Elements
When a full set of new elements goes in, use the opportunity to inspect and service other wear items:
- DEX2422Z2 metal-reinforced seal — If 3+ years old, replace proactively. New cartridges deserve a new seal.
- DEX2421JKIT clamp — Inspect for any deformation, corrosion at the bolt/nut, or damage to the clamp body. Replace if the clamp does not seat cleanly.
- SP1022CBLK drain plug o-ring — Inexpensive and easy to replace. Do it now rather than on the next service call.
- CCX1000V MAR valve o-rings (DEX2420Z8A) — If the valve has been stiff or weeping, service it at this visit.
Record the installation date and the new baseline starting pressure. This data is valuable for setting customer expectations and planning the next replacement interval.
Frequently Asked Questions
Q: Can I replace just two of the four cartridges to save money?
Not recommended. The Hayward manual specifies replacing all cartridges at the same time. Mixing worn and new elements creates uneven flow distribution through the manifold — the new elements will carry more of the flow load and wear faster than they should. Replace all elements in the filter as a complete set.
Q: I just installed new cartridges but the starting pressure is the same as with the old ones. Why?
Check that all cartridges are fully seated on the hub posts on the bottom seal plate and that the manifold is seated correctly. If seating is correct, the high starting pressure is from elsewhere in the system — a partially closed valve, a clogged pump basket, or a pump running at a speed higher than the baseline was recorded at.
Q: How many years do SwimClear cartridges typically last?
Under typical residential conditions with regular cleaning and proper chemistry, 2–4 years is a reasonable range. High-bather-load pools, pools that frequently run algae, or pools with chronically poor chemistry will see shorter service life. Pools with excellent chemistry and moderate use can push to 5 years.
Q: I can't find the original baseline starting pressure. How do I establish a new one?
Install new replacement cartridges, start the system, purge air through the MAR valve until a solid water stream discharges, close the MAR, and immediately read the pressure gauge. Set the green arrow to that reading. This is now your new baseline. Document it with the service date and share it with the customer.
Q: One of the four cartridges in my C4030 has a torn pleat but the other three look fine. What should I do?
Replace all four. The torn cartridge means unfiltered water is bypassing into the pool right now — the filter is not effectively protecting water quality with a damaged element in service. And since all four elements age together, the remaining three are at the same approximate wear stage as the one that failed. Order a CX880XREPAK4 (4-pack for C4030) and replace the full set.