Description
Pentair Superflo union fitting kit 1½” – 2″ 170451
The Pentair Superflo union fitting kit 1½” – 2″ 170451 is the original suction and discharge connection set for Pentair Superflo pool pumps. This kit
includes the complete inlet and outlet unions so you can connect the pump quickly and securely to 1½ inch or 2 inch PVC pipe, ensuring a watertight,
service friendly installation in the technical room.
Main features of the Pentair Superflo union fitting kit 170451
- Original Pentair union fitting kit for Superflo circulation pumps.
- Includes both inlet and outlet unions for a complete pump connection.
- Suitable for 1½ inch and 2 inch PVC pipework via stepped or bushing connection.
- Supplied with union nuts and seals for a reliable, leak free joint.
Function and role in the installation
The union fitting kit 170451 is mounted directly on the suction and discharge ports of the Superflo pump. Each union provides a secure threaded
connection to the pump body and a smooth socket side for gluing PVC pipe or fittings. Using original unions simplifies pump installation, makes
future maintenance easier and reduces the risk of leaks compared with fixed glued connections.
- Allows easy connection and disconnection of the pump without cutting pipes.
- Ensures correct alignment and sealing with the factory Superflo pump ports.
- Supports both 1½ inch and 2 inch pipe systems commonly used in residential pools.
Compatibility and typical applications
The Pentair Superflo union fitting kit 1½” – 2″ 170451 is designed specifically for Superflo pool pumps that use 1½–2 inch unions on suction and
discharge. It follows the original thread and sealing profile, so the union nuts and tailpieces fit directly on the pump housing.
- Compatible with Pentair Superflo pumps that specify reference 170451 as union kit.
- Suitable for new installations and for replacing damaged or leaking original unions.
- Ideal when converting an existing pump to Superflo while keeping 1½–2 inch pipework.
When to use or replace the Superflo union kit
A good union fitting set is essential for leak free operation and for quick pump servicing. Over time, unions can suffer from mechanical stress,
cross threading or chemical ageing of the seals.
- Cracked or deformed union nuts, especially around the gripping tabs.
- Persistent drips or salt deposits at the pump connections despite new seals.
- Damaged or seized threads caused by overtightening or incorrect tools.
- Upgrades or reconfiguration of the technical room where new unions are preferred.
Installation guidelines
Installing the Pentair Superflo union fitting kit 170451 is straightforward and should be done with the system depressurised and the pump disconnected
from the power supply.
- Switch off and isolate the pump electrically and close valves on the suction and return lines.
- If replacing old unions, loosen the union nuts, remove the existing fittings and clean the pump port threads and sealing faces.
- Fit the new union tailpieces and seals supplied in the kit, making sure each gasket is correctly seated.
- Position the pipework or adapters for 1½ inch or 2 inch PVC and glue according to the adhesive manufacturer instructions.
- Screw the union nuts onto the pump ports by hand and tighten until snug; avoid using tools that could damage the plastic.
After the adhesive has cured, reopen the valves, prime the pump and check the unions carefully during the first minutes of operation to confirm that
the connections are completely watertight.
Good practice for durable connections
Correct handling and regular inspection extend the life of the Pentair Superflo union fitting kit 1½” – 2″ 170451 and help the installation remain
service friendly.
- Support the pipework on both sides of the pump so the unions are not loaded by the weight of the pipes.
- Do not overtighten the union nuts; hand tightening is usually sufficient for a good seal.
- Inspect seals periodically and replace gaskets if you notice seepage or flattening.
- Protect the technical area from extreme temperature changes and direct sunlight when possible.
With a correctly installed Pentair Superflo union fitting kit 1½” – 2″ 170451, the pump is securely connected to the filtration circuit while
remaining easy to remove for maintenance, ensuring a clean, professional finish in the plant room.
