Pentair 410028 Union Kit – 2" / 2.5" Pool Plumbing Replacement Fittings
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The Pentair 410028 Union Kit provides a reliable replacement solution for connecting pool pumps, filters, heaters, and other equipment using 2" or 2.5" plumbing. Designed for durability and leak-free performance, this union kit makes installation and service easier by allowing quick disconnection without cutting plumbing.
Constructed from high-strength materials that withstand pressure, chemicals, and outdoor environments, these unions provide long-term reliability on residential and commercial pool systems.
Pentair 410028 Union Kit Compatibility
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Fits 2" and 2.5" Pentair pumps, filters, and heaters.
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Works with systems using 2” socket or 2.5” spigot plumbing.
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Commonly used with Pentair SuperFlo®, WhisperFlo®, IntelliFlo®, and MasterTemp® equipment.
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Compatible with most standard PVC pool plumbing configurations.
Frequently asked questions
How do I confirm the size of this fitting?
PVC is sized by nominal pipe size, which does not match the physical measurement - 2 inch pipe measures about 2.375 inches across the outside. Measure the outside diameter of your pipe and compare it with the specification above rather than measuring the inside.
What is the part number for this fitting?
Pentair lists this fitting under part number 410028. Quote 410028 when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
What is the difference between slip and threaded connections?
Slip connections are solvent welded with primer and cement to make a permanent joint. Threaded connections use tape or sealant and can be taken apart later, which is why they are used where equipment may need to be removed for service.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
Is Schedule 40 or Schedule 80 right for my job?
Schedule 40 handles typical residential pool plumbing. Schedule 80 has thicker walls and a higher pressure rating and is used in commercial installations and on the discharge side of high-head systems. The two share the same outside diameters, so they connect to each other.
Is there a warranty on this fitting?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.