Home » Swimables | SW-41-188 | MasterTemp / Max‑E‑Therm Style Half Union Adapter Kit – Secure 2″ Plumbing Connection

Swimables | SW-41-188 | MasterTemp / Max‑E‑Therm Style Half Union Adapter Kit – Secure 2″ Plumbing Connection

In stock
SKU: SW-41-188
(0)
Length: 11 in Width: 9 in Height: 9 in
$28.99

Swimables SW‑41‑188 half union adapter kit for Pentair MasterTemp and Sta‑Rite Max‑E‑Therm heaters. Includes dual unions, nuts, and O‑rings for reliable 2″ plumbing connections—ideal for leak-free installation or replacement.

Key Features:

  • Full-dual kit: Includes two 2″ half-union slip tailpieces, two union nuts, and two O‑rings—everything needed for both heater inlet/outlet connections 

  • Certified compatibility: Designed as a direct replacement for Pentair MasterTemp (200/250/400) and Sta‑Rite Max‑E‑Therm series, matching OEM part #PKG188 / 42001‑0402 

  • Durable construction: Made from sturdy plastic/PVC material that resists pool chemicals and pressure, ensuring long-term leak-free performance 

  • Simple installation: No gluing required—slip tailpieces fit existing unions, nuts tighten by hand or wrench for a quick, reliable seal 

  • Versatile application: Also compatible with Sta‑Rite pumps and PLDE filters, making it a practical maintenance kit for broader pool plumbing use 

Product Overview:
The Swimables SW‑41‑188 Half Union Adapter Kit offers a professional-grade, comprehensive solution for maintaining or upgrading the plumbing connections on Pentair MasterTemp and Sta‑Rite Max‑E‑Therm pool heaters. This kit mirrors the OEM Pentair PKG188 / 42001‑0402 specification, delivering perfect fitment with 2″ unions on heater models SR200, SR333, and SR400.

Included in the kit are two slip-in tailpieces for quick integration into existing union systems, along with matching union nuts and O‑rings to ensure watertight sealing. Constructed from robust PVC-style plastic, these adapters withstand pool chemicals and pressure without degradation. The plug-and-play design eliminates the need for glue or specialized tools—just slide, tighten, and go.

Beyond heater use, the SW‑41‑188 kit can also serve as a maintenance spare for Sta‑Rite pump-union fittings and PLDE filter connections, enhancing its utility across your pool equipment setup. Whether repairing a leaky union or upgrading system plumbing, this kit ensures a secure, reliable 2″ union connection.