How to Swap Your Hayward Union Nut
Need to replace a cracked or loose union nut on your Hayward cartridge filter? In this quick tutorial, we’ll walk you through the step-by-step process to replace the black union nut on your diverter valve—no stress, no leaks.
Key Takeaways:
Learn how to fully drain and depressurize your filter system safely.
Discover how to use the seat removal tool for secure fitting removal.
Understand how to properly align and tighten the new union nut for a leak-free seal.
Step-by-Step Process:
Turn off your pool system and stop water flow using shut-off valves or Hayward plugs.
Open the air relief valve to release internal pressure.
Loosen the black ring on the filter tank and remove the lid.
Drain water from the bottom plug and pull the filter canister away from the pump.
Remove the old fitting with a seat removal tool.
Slide the new union nut into place behind the fitting and reinsert the fitting securely.
Reconnect everything and tighten the new nut onto the pump fitting.
Ensure all components are sealed and reassembled correctly.
Resources and Explanations:
Black Union Nut: Secures the connection between the diverter valve and pump.
Seat Removal Tool: Essential for safely removing threaded fittings without damage.
Hayward Plugs: Help stop water flow when shut-off valves are unavailable.
Channel Locks: Used for extra torque during final tightening.
FAQs:
Q1: Why do I need to release pressure before opening the filter?
A: Releasing pressure prevents sudden air or water bursts that can cause injury or mess.
Q2: Can I reuse the old union nut?
A: It’s not recommended—cracked or worn threads can lead to leaks.
Q3: Do I need to use any sealant on the new union nut?
A: No additional sealant is needed if the nut and fitting are properly installed and tightened.
Need help? Your local Great Escape team is always happy to help! For more pool care tips and tutorials, hit that subscribe button and keep your pool running like new.
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