383-500-275 Weil-McLain KIT-S C-VLV Brass Valve Kit – 1/4″ x 1/2″ NPT (ULT1-3)
The 383-500-275 Weil-McLain KIT-S C-VLV is a genuine OEM brass valve kit designed for select Weil-McLain boiler and hydronic system applications. Featuring 1/4″ x 1/2″ NPT connections, this valve kit is manufactured to original specifications to ensure proper fit, reliable sealing, and long service life.
Constructed from durable brass, this component is ideal for boiler service, repair, or maintenance where dependable flow control and corrosion resistance are required.
✅ Key Features & Benefits
✔ Genuine OEM Weil-McLain valve kit
✔ Durable brass construction for corrosion resistance
✔ 1/4″ x 1/2″ NPT threaded connections
✔ Designed for secure, leak-free installation
✔ Direct replacement – no modification required
✔ Built to meet original manufacturer specifications
✔ Ideal for boiler and hydronic system service
🔧 Product Overview
| Feature | Details |
|---|
| Manufacturer |
Weil‑McLain |
| Part Number |
383-500-275 |
| Kit Description |
KIT-S C-VLV Valve Kit |
| Material |
Brass |
| Connection Size |
1/4″ x 1/2″ NPT |
| Application Reference |
ULT1-3 |
| Product Type |
Valve Kit |
🔁 Replacement / OEM Reference
(Always verify connection size and application before ordering.)
⚠️ Common Symptoms This Part Fixes
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Leaking or seeping valve connections
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Worn or corroded brass valve components
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Improper flow control in boiler piping
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Valve damage discovered during routine service
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Preventive replacement during boiler maintenance
❓ Frequently Asked Questions (FAQ)
Q: Is this a genuine Weil-McLain part?
A: Yes. This is an OEM Weil-McLain valve kit manufactured to original specifications.
Q: What are the connection sizes?
A: The valve features 1/4″ x 1/2″ NPT threaded connections.
Q: What material is the valve made from?
A: The valve is constructed of brass for durability and corrosion resistance.
Q: What does ULT1-3 refer to?
A: ULT1-3 is the manufacturer’s application reference associated with compatible systems.
Q: Is professional installation recommended?
A: Yes. Installation by a licensed HVAC technician is recommended.
🛒 Shopping Tips
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Confirm thread sizes before ordering
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Use approved thread sealant for gas or hydronic applications
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Inspect surrounding fittings during valve replacement
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OEM brass valves provide better longevity and fit
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Ideal to replace during scheduled boiler service
