The Efield 3/4" NPT Tankless Water Heater Service & Isolation Valve Kit provides a complete, professional-grade solution for installing, isolating, and descaling residential and commercial tankless water heaters. Engineered with heavy-duty forged lead-free brass, this comprehensive kit features colour-coded 1/4-turn full-port ball valves for hot and cold lines, integrated high-flow drain/purge ports with tethered brass safety caps, and an included 150 PSI / 200,000 BTU pressure relief valve.
Key features
- Complete Service & Isolation Set: Includes dedicated hot (red handle) and cold (blue handle) 1/4-turn ball valves with large union connections for simplified servicing and rapid pump disconnects.
- Full-Port High Flow Design: 500 WOG rated ball valves deliver unobstructed water flow, preventing pressure drop across high-demand tankless units.
- Integrated Flush & Purge Ports: Built-in 3/4" male hose thread (GHT) auxiliary drain ports allow direct connection of standard descaling pump hoses without disassembling system piping.
- CSA Certified Pressure Relief Valve: Bundled with an ANSI Z21.22 / CSA 4.4 approved 3/4" 150 PSI, 200,000 BTU/hr temperature and pressure relief valve (PRV).
- Potable Water Safe & Lead-Free: Manufactured from premium dezincification-resistant forged brass meeting NSF/ANSI 61 and NSF/ANSI 372 lead-free drinking water standards.
- Heavy-Duty Brass Drain Caps: Durable brass caps with rubber sealing washers and retaining straps prevent accidental drips and protect purge threads during normal operation.
Specifications
| Brand | Efield |
|---|---|
| Manufacturer Part Number (MPN) | TOOL028 |
| Product Type | Tankless Water Heater Service Valve Kit |
| Primary Inlet Connection | 3/4" Female NPT (National Pipe Tapered) |
| Heater Union Connection | 3/4" Female NPT with captive EPDM union washer |
| Purge / Drain Connection | 3/4" Male Garden Hose Thread (GHT) with brass cap |
| Pressure Relief Valve (PRV) Port | 3/4" Female NPT dedicated relief tap |
| Pressure Relief Valve Rating | 150 PSI / 200,000 BTU/hr (CSA Certified) |
| Valve Pressure Rating | 500 WOG (Water, Oil, Gas) |
| Body Material | Heavy-duty forged lead-free brass |
| Seals & Gaskets | PTFE ball seats, EPDM union gaskets |
| Compliance & Certifications | cUPC Listed, CSA Certified (ANSI Z21.22 / CSA 4.4), NSF/ANSI 61, NSF/ANSI 372 Lead-Free |
| Compatibility | Universal fit for all 3/4" NPT gas and electric tankless water heaters (Navien, Rheem, Rinnai, Bosch, Bradford White, etc.) |
Before you buy
- Verify that your tankless water heater water connections are 3/4" NPT (the standard connection size for almost all residential and light commercial tankless water heaters in North America).
- Standard annual maintenance requires flushing the heat exchanger with a mild descaling solution (food-grade citric acid or white vinegar) via the integrated purge valves to preserve efficiency and maintain manufacturer heat exchanger warranty.
- Thread sealant (Teflon tape or approved pipe dope) must be applied to all male NPT pipe threads; union and hose drain connections use internal gaskets and do not require thread tape.
Common questions
Is installation included?
No. AVL Shop sells equipment only. Installation is done by an independent licensed contractor that you hire.
How is freight charged?
Freight cost is included in your written quote before you pay.
What warranty does this product have?
The manufacturer warranty applies. Where we have the manufacturer’s exact wording, it is shown in the Warranty row of the specifications on this page, with a link to the source.
How do I get a quote?
Use Request a quote on this page and send the model and your city or postal code.