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3/4 In Lead Free Boiler Pressure Relief Valve, 75 psi, Threaded Female Connections
LF174A-075 3/4 - spec sheet
LF174A-075 3/4 - spec sheet
Manufacturer Resources
Product Specs
- Buy American Act Compliant:
- USA
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
Watts LF174A-075 3/4 – Frequently Asked Questions
1) What pressure does the Watts LF174A relief valve open at, and is that right for a residential hot water boiler?
The LF174A-075 is factory set to relieve at 75 psi. That is above the common 30 psi setting used on most residential hydronic boilers, so check the maximum allowable working pressure stamped on your boiler's rating plate before fitting it. A 75 psi setting suits equipment rated for it, not a low pressure residential system set up for 30 psi relief.
2) What size and type of connection does the Watts LF174A-075 boiler relief valve have?
It is a 3/4 inch valve with threaded female connections on both the inlet and the outlet. You thread it onto a 3/4 inch male NPT nipple at the boiler tapping, and the female outlet takes a 3/4 inch nipple for the discharge pipe.
3) Is the Watts LF174A a pressure only relief valve or does it also relieve on temperature?
The LF174A-075 is a pressure relief valve only, set at 75 psi. If your boiler tapping calls for a combination temperature and pressure relief valve, this is not the part, and a valve with a temperature probe should be used instead.
4) Is the Watts LF174A-075 lead free for potable water systems?
Yes, the LF174A-075 is a lead free relief valve, so it can be used where lead free construction is required on potable water piping.
5) Does the Watts LF174A-075 meet Buy American requirements for a government or institutional job?
The LF174A-075 is listed as Buy American Act compliant with USA country of origin, which is what a federal, municipal, or public institution spec typically asks for on a relief valve submittal.
6) Do I need anything besides the valve itself to install this 3/4 inch boiler relief valve?
Plan on a 3/4 inch nipple to thread into the boiler tapping and a full size 3/4 inch discharge pipe off the outlet, since both ends of the LF174A-075 are female threaded and nothing is supplied with the valve. The discharge line runs full size to a safe termination and is never valved, plugged, or reduced.
7) What is the exact Watts part number to order for the 3/4 inch 75 psi boiler relief valve?
Order Watts model LF174A-075 3/4. The 075 in the number is the 75 psi relief setting and the 3/4 is the connection size, so both the pressure and the pipe size are fixed by that single part number.
How fast can I get the Watts LF174A-075 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 LF174A-075 3/4 come with a warranty?
Absolutely. The Watts LF174A-075 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 LF174A-075 3/4?
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