Pentair Pump 2" Slip 1/2" Union Kit | PKG 188Z
Pentair
SKU: PKG 188Z
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.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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