Waterway 2" Heater Split Nut [w/Screws] [Universal Fit] (400-5161)

Fittings & Valves: Unions
Waterway Plastics
400-5161
89-238-1044
400-5161
COMPARE AT $14.79
OUR PRICE $8.44
STOCK STATUS IN STOCK Ships Usually the Same/Next Business Day
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Under 25 lbs. Contiguous USA
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The Waterway 400-5161 heater split nut is designed for compatible 2 inch heater union applications and includes screws, with a universal-fit design. A split nut in this style is useful because it helps secure the connection while still allowing easier servicing than a permanently fixed plumbing joint.

The universal-fit format makes this Waterway part especially practical across a wider range of compatible heater setups, and the included screws help simplify the repair by providing a more complete replacement package. That can make service faster and more straightforward when the original nut or hardware has failed.

For compatible heater plumbing service, this Waterway split nut is a practical choice when a universal-fit 2 inch replacement with included screws is needed.

  • Waterway 2 inch heater split nut
  • Universal-fit design
  • Includes screws
  • Useful for heater union repair and replacement
  • Supports a cleaner and more serviceable connection
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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