N40HLC 40mm Shower Cartridge for Zurn Z-7300 Temp-Gard III

N40HLC 40mm Shower Cartridge – Precision Replacement for Zurn Temp-Gard III

Restore your shower to peak performance with the N40HLC Shower Cartridge, a high-quality ceramic and plastic replacement designed specifically for Zurn Z-7300 Temp-Gard III Series single-handle tub and shower faucet valves. Engineered for durability and ease of installation, this 40mm cartridge delivers smooth, accurate water temperature and flow control — no drips, no sudden temperature swings.

Key Features

• Premium Materials: Constructed from high-grade plastics and ceramic discs that resist high temperatures and stress, ensuring a long service life and consistent performance.
• Correct Replacement Part: Replaces part numbers RK7300-CART-3P, JH02BJ, HL-40, and Z-7300. Dimensions: 3.14" (80mm) long × 1.58" (40mm) wide. Note: Specifications differ from the N40HKC — please verify your model before ordering.
• Broad Compatibility: Designed as a direct-fit replacement for the Zurn Temp-Gard III series single-handle tub and shower faucet valves, making installation straightforward and hassle-free.
• Smooth Temperature Control: Pressure-balancing design provides precise, smooth adjustment of hot and cold water, preventing sudden temperature fluctuations for a comfortable shower experience.
• Superior Sealing: Equipped with a high-performance rubber sealing ring that ensures a tight, leak-free fit and enhanced sealing performance.

Specifications

What's in the Box

• 1 × N40HLC Shower Cartridge (40mm)

Installation Tips

Before purchasing, please compare the dimensions and part numbers in our photos carefully against your existing cartridge. Shut off the water supply before beginning installation. This cartridge is designed for a tool-friendly DIY replacement — most homeowners can complete the swap in under 30 minutes.

For guidance on plumbing safety and proper fixture maintenance, visit the U.S. Consumer Product Safety Commission (CPSC) for helpful consumer safety resources.

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Frequently Asked Questions

Q: What faucet models is the N40HLC shower cartridge compatible with?

A: The N40HLC shower cartridge is a direct replacement designed for the Zurn Temp-Gard III Series Z-7300 single-handle tub and shower faucet valves. It replaces part numbers RK7300-CART-3P, JH02BJ, HL-40, and Z-7300. Always verify the part number and dimensions (80mm × 40mm) against your existing cartridge before ordering.

Q: What is the difference between the N40HLC and the N40HKC cartridge?

A: The N40HLC and N40HKC are different cartridges with different specifications. The N40HLC measures 3.14" (80mm) long and 1.58" (40mm) wide. They are not interchangeable — please check your faucet's model number and compare with the product images to ensure you are ordering the correct replacement.

Q: Is this shower cartridge easy to install at home?

A: Yes — the N40HLC cartridge is designed for straightforward DIY installation. Simply shut off your water supply, remove the old cartridge, and insert the new one. No special tools are typically required, and most homeowners complete the replacement in under 30 minutes.

Q: Will this cartridge stop dripping or leaking from my shower faucet?

A: The N40HLC features a high-performance rubber sealing ring designed for a tight, secure fit. When properly installed, it helps prevent drips and leaks by restoring a like-new seal within your Zurn Temp-Gard III valve body.