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3/4 In Bronze Boiler Pressure Relief Valve, 30 psi, Threaded Female Connections
174A-030 3/4 - spec sheet
174A-030 3/4 - spec sheet
Manufacturer Resources
Product Specs
- Body Material:
- Bronze
- Buy American Act Compliant:
- USA
- Ean:
- 98268013054
- Gds Status:
- Registered
- Inlet Connection Size:
- 3/4 IN
- Inlet Connection Type:
- Female Threaded
- Inlet Thread Type:
- NPT
- Lead Free:
- No
- Maximum Temperature Fahrenheit:
- 250
- Maximum Working Pressure Psi:
- 20
- Outlet Connection Size:
- 3/4 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Part Number:
- 274428
- Pressure Range:
- 30 to 150 PSI
- Pressure Relief Setting Psi:
- 30
- Pressure Steam Discharge Capacity:
- 650,000 BTU per hour
- Protection Type:
- Pressure
- Series:
- 174A
- Temperature Relief Fahrenheit:
- 9999
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
- Brand Name:
- Watts
Watts 174A-030 3/4 – Frequently Asked Questions
1) Will the Watts 174A-030 work on a steam boiler or is it for hot water heating?
The 174A-030 is a pressure-only relief valve, rated by steam discharge capacity at 650,000 BTU per hour with a 30 psi relief setting. Its protection type is pressure, not pressure and temperature, so it does not carry a temperature relief function. Use it where the code calls for a pressure relief valve on a boiler; if the appliance needs combined pressure and temperature (T&P) protection, such as a domestic water heater, this is the wrong valve.
2) Is the Watts 174A-030 lead free? Can I put it on potable water?
It is not a lead free valve. Keep it on closed hydronic heating systems, which is what the 174A series is built for. For anything in a potable water path, including a domestic water heater, you need a valve certified lead free under the current drinking water rules, and this is not one.
3) What temperature can the Watts 174A-030 bronze relief valve handle?
Maximum temperature is 250 degrees F. That covers a standard hydronic hot water boiler loop with room to spare. The body is bronze, so it holds up in closed-loop heating water service.
4) We buy under Buy American requirements. Does the Watts 174A-030 qualify?
Watts lists the 174A-030 as Buy American Act compliant, country USA. That matters for federal, military, and many state and municipal jobs where domestic sourcing is written into the spec.
5) Does the Watts 174A-030 protect against overheating as well as overpressure?
No temperature relief element is part of this valve. It is a straight pressure relief device, tripping at 30 psi. On a hot water heating boiler that is usually paired with a separate high limit aquastat for temperature protection. If your installation requires a combined temperature and pressure device, specify a T&P valve instead.
How fast can I get the Watts 174A-030 3/4 delivered?
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Watts 174A-030 3/4 come with a warranty?
Absolutely. The Watts 174A-030 3/4 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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