Pentair PKG 188Z — 2" Union Adapter Kit (Pack of 2)
Product Overview
The Pentair PKG 188Z is a genuine OEM two-piece 2" union adapter kit designed to connect 2" slip PVC plumbing to Pentair or Sta-Rite equipment ports with 2" female buttress threads. Ideal for use with pumps, filters, and heaters, this kit provides a secure, leak-free connection and simplifies equipment installation or replacement.
Includes
- (2) Union adapter halves — 2" slip x 2" female buttress thread
- (2) O-rings
- Integrated union nuts
Key Features
- 2" slip connection fits standard Schedule 40 PVC
- 2" female buttress thread connects to compatible Pentair/Sta-Rite ports
- Durable thermoplastic material resists pool and spa chemicals
- Easy installation and removal for maintenance or replacement
- OEM fit ensures precise alignment and reliable sealing
Common Compatibility
Fits a variety of Pentair and Sta-Rite equipment including:
- Heaters: MasterTemp®, Max-E-Therm®
- Pumps: Max-E-Pro®, Dyna-Pro®, Dyna-Glas®, Dyna-Max®
- Filters: System 2® PLDE Series and System 3® SM/SMD Series
Note: Always verify your equipment’s port size and thread type before ordering.
Technical Specifications
- Connection Type: 2" slip x 2" female buttress thread
- Nominal Size: 2" (both ends)
- Material: Chemical-resistant thermoplastic
- Seal: O-ring (included)
- Quantity: Two unions per kit
Installation Instructions
- Turn off power and relieve pressure before starting.
- Clean all mating surfaces and inspect O-rings for damage.
- Apply pool-safe, non-petroleum lubricant to the O-rings.
- Hand-tighten the union nuts until snug—avoid overtightening.
- Restore pressure and check for leaks after installation.
Troubleshooting
-
Leaking at union face: Ensure O-ring is seated properly and not damaged.
-
Cross-threading: Back off and start the union nut again to align threads.
-
Persistent leaks: Replace O-ring or inspect for cracks or warped fittings.
Part Identification
- Manufacturer: Pentair
- Part Number: PKG 188Z
Maintenance Tip
Inspect the union O-rings annually or whenever equipment is serviced. Clean and re-lubricate O-rings periodically to maintain a proper seal. Replace O-rings at the first signs of cracking or flattening for best performance.
