Hayward ProGrid DE Filter Grid Inspection and Replacement Guide
Quick Summary
- The ProGrid uses 7 full-length and 1 short filter element per cluster. Each element must be individually inspected at every manual cleaning.
- Tears and holes are confirmed by holding an element up to bright light — compromised cloth shows as bright spots where light passes abnormally.
- Individual elements can be replaced without replacing the entire cluster assembly.
- Part numbers are model-specific — a DE2420 element will not fit a DE4820. Always verify model before ordering.
ProGrid Element Cluster Overview
The filter element cluster (also called the grid cluster or septum assembly) sits inside the lower filter body and is the heart of the DE filtration system. The cluster consists of:
- 7 full-length filter elements (DEX2400DA and model variants)
- 1 short filter element (DEX2400DS and model variants)
- Top collector manifold (DEX2400C)
- Retainer rod (model-specific)
- Element locators (DEX2400H)
- Retainer nut and washer hardware
The 8 elements are arranged radially around the collector manifold. Each element consists of a rigid frame with monofilament polypropylene filter cloth stretched and heat-bonded over the frame. The cloth is what holds and supports the DE cake. When the cloth is compromised, DE passes straight through into the pool.
Grid Inspection Criteria
Inspect grids at every manual cleaning, and inspect them again any time DE returns to the pool. The inspection takes about 5 minutes if you are systematic.
The light test
Hold each element up to a bright light source — a work light, a sunny doorway, or a phone flashlight held behind the element. Healthy grid cloth should show a uniform, fine mesh pattern. Look for:
- Bright spots or pinholes: Light passes through where the cloth is torn or worn through. Any visible hole is a replacement indicator.
- Translucent patches: Areas where the cloth is thinned significantly but not yet torn. These will fail soon — replace proactively if a pattern of thinning is visible.
- Frame separation: Look at where the cloth is bonded to the plastic frame at the edges and seams. Separation or lifting of the cloth from the frame creates bypass channels.
Physical inspection
Run your fingers across the cloth (once it is clean and dry). Cuts, gouges, or areas where the cloth feels rough or frayed should be flagged. Also check the ends where the element connects to the manifold — the plastic end caps should be intact with no cracks.
The manifold and retainer hardware
While the cluster is out, inspect the top collector manifold (DEX2400C) for cracks, especially at the element sockets and at the outlet port where it seats on the outlet elbow. Flex the plastic gently and look for hairline cracks. A cracked manifold bypasses the entire filtration system.
Check the retainer nut (ECX176865, 5/16"-18), washers (ECX1109, 2 required), and retainer rod for straightness and secure connection. Loose retainer hardware allows elements to shift and gap, creating bypass.
Filter Element Part Numbers By Model
Part numbers are model-specific and are not interchangeable between models. Use the model number from the filter tank label to confirm which parts to order.
| Model | Full Element (7 req.) | Short Element (1 req.) | Complete Cluster |
|---|---|---|---|
| DE2420 | DEX2400DA | DEX2400DS | DEX2420DC |
| DE3620 | DEX3600DA | DEX3600DS | DEX3600DC |
| DE4820 | DEX4800DA | DEX4800DS | DEX4800DC |
| DE6020 | DEX6000DA | DEX6000DS | DEX6000DC |
| DE7220 | DEX7200DA | DEX7200DS | DEX7200DC |
The complete cluster assembly (DC suffix) includes all elements, the manifold, locators, and all associated hardware. It is generally cost-effective compared to buying all 8 individual elements plus hardware when a full set is needed.
Individual Element Replacement vs. Full Cluster
Replace individual elements when:
- Only 1–2 elements are torn or compromised
- The manifold and hardware are in good condition
- The remaining elements are relatively new (less than 4–5 years)
Replace the full cluster when:
- 3 or more elements are torn or heavily worn
- The manifold is cracked or socket seats are damaged
- All elements are at end of service life (7+ years, or show widespread cloth thinning)
- The retainer rod is bent, corroded, or the retainer nut is stripped
- Full cluster pricing is close to the cost of individual elements plus labor
Replacing Individual Elements: Procedure
- Remove the element cluster from the filter following the disassembly procedure in the manual cleaning guide.
- Hose down the cluster. Remove the retainer nut (ECX176865) and washer (ECX1109) from the top of the retainer rod.
- Lift the top collector manifold off. The elements can now be slid off the retainer rod individually.
- Note the position of the short element — it occupies one of the 8 positions and must be reinstalled in the same orientation.
- Slide new elements onto the retainer rod in the correct positions. Seat them fully into the element locators (DEX2400H).
- Reinstall the top collector manifold, washer, and retainer nut. Tighten the nut securely.
- Hose down the assembled cluster, inspect one more time, and reinstall per the reassembly procedure.
Expected Element Lifespan
Hayward does not publish a specific element lifespan, but field experience suggests 5–10 years on residential pools under normal conditions. Factors that shorten element life:
- High bather load (commercial or heavily used pools)
- Persistent algae or high organic load
- High pH / calcium deposits causing abrasion from scale
- Incorrect DE amounts causing uneven loading
- Pressure washing elements instead of hand-brushing
Frequently Asked Questions
How do I tell which one is the short element when reassembling?
The short element (DS suffix) is visibly shorter than the full-length elements (DA suffix). On most models, it sits in a specific position on the retainer rod — note the position before disassembly. If you forget, the short element goes in the position closest to the outlet elbow port, but check your specific model's parts diagram to confirm orientation.
Can I mix old and new elements in the same cluster?
Yes. Replacing only the compromised elements and leaving the rest in place is standard practice. There is no functional issue with mixing element ages as long as all elements pass the light test inspection.
The plastic frame on an element cracked but the cloth is fine. Do I need to replace the element?
Yes. A cracked frame can cause the cloth to sag or shift, creating bypass channels along the crack. The cloth condition alone does not determine whether an element is serviceable — the frame must also be intact.
I replaced all the elements but still see DE returning to the pool. What did I miss?
Check the outlet elbow O-ring (DEX2400Z5) and the top collector manifold (DEX2400C) for cracks. These are the two other bypass points that can cause DE to return even with intact elements. See the DE returning to pool guide.