The Harvey G1898 Shuttle Valve Assembly is the critical switching component for large-format H25 and H30 series water softeners. Designed for systems with 1-inch inlet/outlet ports, this assembly manages the internal water flow between the twin resin tanks.
If your high-capacity system is failing to regenerate or is wasting water, the G1898 is the primary mechanical part required to restore OEM-standard performance.
⚠️ Identification Guide: Is this the right part?
Before ordering, please verify your system type:
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H25/H30 Models: These units feature a separate, standalone salt bin and larger 1-inch plumbing connections. This G1898 is the correct fit.
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H2O Series: If your softener is a compact "block salt" model where the tanks and salt are in the same cabinet (3/4-inch ports), you require the G1491 kit instead.
Key Symptoms: Why Replace the G1898?
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Constantly Running to Drain: If you hear water flowing into the waste pipe 24/7, the shuttle valve is likely stuck or failing to seat. This is the #1 diagnostic starting point.
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Hard Water Breakthrough: A worn shuttle can allow hard water to bypass the resin tanks entirely, leading to limescale in your hot water system.
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Failure to Switch Tanks: In twin-tank systems, the shuttle must toggle between cylinders. If one tank stays "on" until it's exhausted without switching, the G1898 is likely at fault.
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Internal Pressure Leaks: While the meter or idling gear can cause issues, a leaking shuttle assembly is the most frequent cause of "ghost" drainage.
Features & Benefits
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High-Flow Engineering: Specifically ported for 1-inch systems to ensure zero drop in water pressure across large properties.
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Complete Assembly: A brand-new, factory-sealed unit ready for direct installation.
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Diagnostic Priority: Replacing the shuttle valve resolves the majority of "running to drain" faults before more expensive meter replacements are needed.
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Genuine Harvey Part: Guaranteed compatibility with H25 and H30 series manifolds.
Important Ordering Information
Lead Time: Please note that H25/H30 components are specialist parts. The G1898 carries a lead time of approximately 7–10 working days.
Harvey G1898 Shuttle Valve Assembly | For 1" H25 & H30 Twin Tank Softeners
