Jandy R0523000 filter drain cap with O-ring and union nutJandy Drain Cap with O-Ring and Union Nut for DEV and CL Filters, R0523000 In stock$3699
Jandy R0523000 filter drain cap with O-ring and union nut
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Jandy Drain Cap with O-Ring and Union Nut for DEV and CL Filters, R0523000

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$3699
In stock
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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.
Full description and specifications ↓

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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.

Specifications
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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Questions and answers

What people ask about this product, answered by our pool techs.

Does this include the O-ring and the nut?
Yes. Jandy R0523000 comes as the cap, the O-ring and the union nut together.
How do I confirm it is the right cap?
Look at the markings. The cap in this assembly is stamped A0118300 and the union nut is stamped A0578900.
Which filters does it fit?
It is listed for Jandy DEV series and CL series filters. One manufacturer description refers to CV filters instead of CL, so check the markings on your existing cap before ordering.
My filter drips at the bottom, is this the fix?
Usually. A drip at the drain port comes from a cracked cap or a hardened O-ring, and this assembly replaces both along with the nut.
Ask your own question