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Manufacturer Resources
Product Specs
- Body Material:
- Iron
- Buy American Act Compliant:
- No
- Ean:
- 98268018899
- Inlet Connection Size:
- 3/4 IN
- Inlet Connection Type:
- Female Threaded
- Inlet Thread Type:
- NPT
- Lead Free:
- Not In Scope
- Maximum Temperature Fahrenheit:
- 250
- Maximum Working Pressure Psi:
- 38
- Outlet Connection Size:
- 1 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Part Number:
- 382328
- Pressure Range:
- 30 to 75 PSI
- Pressure Relief Setting Psi:
- 50
- Pressure Steam Discharge Capacity:
- 1,352,000 BTU per hour
- Protection Type:
- Pressure
- Series:
- 740
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
- Brand Name:
- Watts
Watts 740-050 3/4 – Frequently Asked Questions
1) What size pipe does the Watts 740-050 3/4 boiler relief valve connect to?
The 740-050 3/4 has a 3/4 inch female NPT inlet and a 1 inch female NPT outlet. The larger outlet is the expanded-outlet design, so you thread it into a 3/4 inch tapping on the boiler and run 1 inch pipe for the discharge line. Plan your drain piping for 1 inch NPT, not 3/4.
2) At what pressure does the Watts 740 relief valve open, and can I adjust it?
This one is factory set at 50 psi and is not field adjustable. The 740 series covers 30 to 75 psi across the family, so if your boiler is tagged for a different relief setting you order the model built at that setting rather than changing this one.
3) Is the Watts 740-050 3/4 a pressure-only relief valve or a combination temperature and pressure valve?
Pressure only. The 740 protects against overpressure and has no temperature probe, which is why it suits hot water heating boilers rather than domestic water heaters. If you are protecting a water heater you need a T and P valve with an extension element, not this one.
4) What boiler input can a Watts 740-050 handle?
The 740-050 3/4 is rated for 1,352,000 BTU per hour of steam discharge capacity, so it covers boilers whose input rating is at or below that figure. Size the valve to the boiler's rated input, not to the pipe size you happen to have.
5) Can I use a Watts 740-050 on a federal job with Buy American requirements?
No. The 740-050 3/4 is not Buy American Act compliant, so on a federally funded project with a domestic sourcing clause you will need a compliant alternate.
6) What part number do I give my supplier for the 50 psi Watts 740?
Order it as Watts 740-050 3/4, series 740, manufacturer part number 382328. The 3/4 in the model refers to the inlet size; the outlet on this build is 1 inch.
How fast can I get the Watts 740-050 3/4 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Watts 740-050 3/4 come with a warranty?
Absolutely. The Watts 740-050 3/4 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Watts 740-050 3/4?
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