Identifying Vintage Brass Hydraulic Valves: The Imperial Brand

Decoding Old Hydraulic Valve Markings

If you have a hydraulic sprinkler system from the early 1970s with brass valves marked with an "I" containing an imposed "C," the manufacturer is likely Imperial.

Challenges with Vintage Hydraulic Systems

• Parts for these old brass valves are extremely scarce.
• Hydraulic valves and controllers are largely obsolete.
• Repair expertise is hard to find.

Recommended Path Forward

Converting the system to electric (solenoid) valves and a modern controller is usually more cost-effective and reliable. This involves:

1. Replacing hydraulic valves with electric solenoid valves.
2. Running low-voltage wire from a new controller to each valve.
3. Installing a modern programmable timer.

While the upfront cost is higher, you gain precise scheduling, water-saving features, and easy access to parts and service. Consult a local irrigation professional for a conversion estimate.