What are tankless service valves?

Tankless service valves are specialized isolation valves installed on tankless water heaters that allow safe flushing, maintenance, and servicing of the unit without shutting down water to the entire home.

Why are service valves important for tankless water heaters?

Service valves make routine maintenance—such as descaling—faster, safer, and more effective. They help protect the heat exchanger and extend the life of the system.

Does every tankless water heater need service valves?

Yes. Most manufacturers require service valves to be installed to perform proper maintenance and to maintain warranty coverage.

How do I know if my tankless service valves need replacement?

Signs include leaking valves, seized handles, corrosion, or difficulty performing maintenance due to poor valve operation.

Can service valves be added to an existing tankless system?

Yes. Service valves can be installed or upgraded on existing tankless water heaters to improve serviceability and maintenance access.

Are service valve installations usually completed in one visit?

Most tankless service valve installations or replacements can be completed in a single visit, depending on access and existing plumbing configuration.

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Tankless Service Valve Installation & Replacement

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Warranties & Guarantees

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DTH Promise™ 2-Year Labor Warranty

Coverage Policy

2 years•Our workmanship is guaranteed for two full years on eligible installations and repairs.

Reasons Why You Would Need Tankless Service Valve Installation & Replacement

Common situations where installing tankless service valve installation & replacement is the right long-term solution for performance, efficiency, and reliability.

Missing service valves on tankless system

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Service valves are required for proper flushing and maintenance.

Difficulty performing routine maintenance

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Without valves, descaling and servicing becomes harder and riskier.

Leaking or failing service valves

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Worn valves can leak and should be replaced promptly.

Required upgrade for manufacturer guidelines

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Proper valves help protect warranties and extend system life.

What to Expect During Tankless Service Valve Installation & Replacement

A professional, step-by-step process designed to improve service access, protect your tankless system, and support proper long-term maintenance.

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