Finding Replacement Solenoids and Valve Parts for Older Irrigation Systems

Identify the Valve First

The solenoid model “JH 811” alone isn’t enough to locate a replacement. You need to know the valve brand and model it came from. Look for a nameplate on the valve body or bonnet—common brands include Rain Bird, Hunter, Toro, Irritrol, and older Hardie/JH Hardy models.

When to Replace the Entire Valve

On older valves, solenoids are often expensive and hard to find. In many cases, replacing the entire valve (or just the bonnet assembly with solenoid) is cheaper and faster. Modern valves like the Rain Bird DV/DVF series or Hunter PGV series are widely available and cost roughly the same as a vintage solenoid.

Where to Buy Parts

• John Deere Landscapes (now SiteOne Landscape Supply): Branches in nearly every state; they carry a broad range of irrigation valves, solenoids, and repair kits.
• Ewing Irrigation: Another national distributor with local branches.
• Local irrigation supply houses: Often have cross-reference charts for obsolete parts.
• Online retailers: Sprinkler Warehouse, Amazon, and manufacturer direct sites.

Diagnosing a “Leaking All the Time” Valve

If a zone weeps continuously even with the controller off, the problem is usually debris holding the diaphragm open, a torn diaphragm, or a cracked valve body. Since you’ve already replaced sprinkler heads without success, focus on the valve itself:

1. Shut off the main water supply.
2. Remove the valve bonnet and inspect the diaphragm for tears, warping, or debris.
3. Clean the valve seat and all ports with a soft brush and water.
4. Reassemble with a new diaphragm if any damage is found.
5. If the body is cracked, replace the entire valve.

Pro Tip

Take a photo of the valve and solenoid before disassembly. Bring the old parts to the supplier—they can often match them visually even without a model number.