
Quick overview
- Complete assembly Cap, O-ring and union nut together, not just the cap on its own.
- Genuine Jandy Factory part R0523000, the same assembly the filter left the plant with.
- Marked parts The cap is stamped A0118300 and the union nut is stamped A0578900, so you can match what is on your filter.
- Stops a weeping drain A cracked cap or a flattened O-ring drips at the bottom of the tank, and this replaces both at once.
- Plastic construction Molded plastic, matched to the original drain port.
- Filter tank drain Fits the drain port used to empty the tank for service and winterizing.
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Product details
Jandy R0523000 is the drain cap assembly for DEV and CL series pool filters. It arrives as a set: the drain cap, the O-ring that seals it and the union nut that holds it to the tank.
Match it by the markings
The cap in this assembly is stamped A0118300 and the union nut is stamped A0578900. Those numbers are molded into the parts, so you can pull the old cap off and compare before you order.
When to replace it
The drain port is opened every time the tank is emptied for service or winterizing, and the cap takes the wear. A steady drip at the bottom of the filter usually means the O-ring has hardened or the cap has cracked at the threads. Replacing the whole assembly avoids chasing the leak twice.
Genuine part
This is the Jandy factory assembly in plastic, not a generic cap, so the threads and the seal match the tank as built.
| Brand | Jandy |
|---|---|
| Manufacturer part number | R0523000 |
| UPC | 052337053235 |
| Type | Filter drain cap assembly |
| Material | Plastic |
| Included | Drain cap, O-ring, union nut |
| Cap marking | A0118300 |
| Union nut marking | A0578900 |
| Fits | Jandy DEV series and CL series pool filters; the manufacturer description also refers to CV filters |
| Shipping weight | 0.55 lb |
| Ships | Parcel |
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