Waterco 3" FBT x 3" S Union Adapter (634080BLK)

Fittings & Valves: Unions
Waterco USA
634080BLK
35-252-1330
COMPARE AT $78.96
OUR PRICE $62.74
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 Waterco union adapter is designed for compatible plumbing applications that require a 3 inch female buttress thread connection on one side and a 3 inch slip connection on the other. An adapter in this format is useful because it allows different plumbing connection types to work together without sacrificing serviceability or forcing awkward transitions into the line.

This replacement is especially useful when a threaded union-style body must connect to a solvent-welded pipe section while keeping the plumbing layout true to the intended design. Larger fittings like this benefit from using the correct adapter instead of trying to patch the connection together with multiple unrelated parts.

The 634080BLK is a practical choice when a compatible Waterco system needs a clean, larger-size union transition between threaded and slip plumbing.

  • Waterco union adapter
  • 3 inch female buttress thread by 3 inch slip configuration
  • Helps transition between union-style and slip plumbing sections
  • Useful for larger compatible plumbing applications
  • Supports cleaner fit and easier service access
Waterco USA – Pool Filters, Pumps, Multiport Valves and Water Treatment Systems
Who is Waterco USA?

Waterco USA is a global manufacturer of pool, spa, and water treatment equipment, known for advanced filtration technology and durable system design. With a focus on performance and sustainability, Waterco provides solutions used in residential, commercial, and industrial water applications.

What products does Waterco USA specialize in?

Waterco USA specializes in pool filters, pumps, multiport valves, and water treatment systems. Their product lineup includes sand filters, cartridge filters, and advanced filtration systems designed to maintain clean, clear water. Waterco components are commonly used in pool circulation systems and filtration setups.

Why choose Waterco USA parts for your pool or spa?

Waterco products are known for filtration efficiency, durability, and energy-conscious design. Their systems are engineered to deliver consistent water clarity while reducing maintenance and operational costs. Pool owners and professionals choose Waterco for reliable equipment that supports long-term water quality and system performance.

How do you identify and choose the correct Waterco USA part?

To select the correct Waterco component, it’s important to match specifications such as filter type, tank size, flow rate, valve configuration, and system compatibility. Reviewing model numbers and system requirements ensures proper fit and performance. Choosing the right part helps maintain efficient filtration and water quality.

Need help finding the right Waterco USA part?

At Bath & Spa Parts Online, we carry a wide selection of Waterco USA 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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