Waterway Drain Assembly [Drain Plug/O-Ring] (400-6621)

Fittings & Valves: Plugs
Waterway Plastics
500-5310
17-270-1220
500-5300
COMPARE AT $17.63
OUR PRICE $9.84
STOCK STATUS IN STOCK Ships Usually the Same/Next Business Day
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$9.88 Standard Shipping
Under 25 lbs. Contiguous USA
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Important Product Note
This replaces the Cap 500-5300

The Waterway 400-6621 [500-5300] drain assembly includes the drain plug and O-ring for compatible plumbing and service applications. A kit like this is useful because it refreshes both the closure piece and the sealing element together, which often produces a more dependable repair than changing only one of the two parts.

Drain-point service is most effective when the plug and seal are both in good condition, especially if the original assembly has shown wear, seepage, or age-related deterioration. This Waterway drain assembly helps simplify the repair by providing a coordinated replacement set.

For compatible plumbing maintenance and service work, this Waterway drain assembly is a practical option when both the plug and sealing O-ring need to be renewed together.

  • Waterway drain assembly
  • Includes drain plug and O-ring
  • Helps restore both closure and sealing performance
  • Useful for drain-point maintenance and repair
  • Supports cleaner and more dependable service results
Waterway Plastics – Spa Jets, Pumps, Filters, Valves and Pool & Spa Components
Who is Waterway Plastics?

Waterway Plastics is a leading manufacturer of pool and spa components, known for durable construction and broad product compatibility. With decades of experience, Waterway provides essential parts used in both residential and commercial aquatic systems.

What products does Waterway Plastics specialize in?

Waterway Plastics specializes in spa jets, pumps, filters, valves, manifolds, and plumbing components. Their product lineup includes critical parts used in spa and pool systems for water circulation, filtration, and hydrotherapy performance. Waterway components are widely used in both OEM and replacement applications.

Why choose Waterway Plastics parts for your pool or spa?

Waterway Plastics products are known for reliability, compatibility, and long-lasting performance. Their components are engineered to withstand water pressure, chemical exposure, and continuous operation. Spa owners and professionals choose Waterway for dependable parts that maintain system performance and extend equipment life.

How do you identify and choose the correct Waterway Plastics part?

To select the correct Waterway component, it’s important to match specifications such as size, connection type, jet style, and system compatibility. Reviewing model numbers and part dimensions ensures proper fit and function. Choosing the right part helps maintain efficient operation and optimal spa performance.

Need help finding the right Waterway Plastics part?

At Bath & Spa Parts Online, we carry a wide selection of Waterway Plastics pool, spa, and bath parts ready to ship. Can’t find what you need? Contact our Product Specialists at 800-918-9143, use the live chat, or visit our Contact Us page. For installation guides, part diagrams, and troubleshooting resources, visit the Bath & Spa Parts Online Knowledge Base for expert support.

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