Pentair 42001-0402 2" Heater Half Union

🔧 Pentair 42001-0402 2" Heater Half Union

Replacement half union for select Pentair pool and spa heaters with 2-inch plumbing connections. This union is designed to help connect heater water lines securely and is commonly used on compatible Pentair heater models.

✅ Product Features:

• 2-inch heater half union for pool and spa equipment
• Used to create a secure, serviceable plumbing connection at the heater
• Helpful for replacement of worn, cracked, or leaking union components
• Durable construction for pool and spa circulation systems

📌 Compatibility:

• For select Pentair heaters that use part number 42001-0402
• Verify fit by matching the existing union style, thread pattern, and 2-inch connection size before ordering

🛠 Installation Notes:

• Shut off power and water flow before servicing heater plumbing
• Inspect sealing surfaces and replace worn gaskets or O-rings as needed
• Hand tighten only unless the manufacturer specifies otherwise

📋 Replacement Part Number:

42001-0402

⚠️ Always confirm model compatibility with your heater manual or existing part before purchase.