You may also like
Manufacturer Resources
Product Specs
- Body Material:
- Lead Free Copper Alloy
- Buy American Act Compliant:
- USA
- Ean:
- 98268435160
- Inlet Connection Size:
- 3/4 IN
- Inlet Connection Type:
- Male Threaded
- Inlet Thread Type:
- NPT
- Lead Free:
- Yes
- Maximum Temperature Fahrenheit:
- 210
- Maximum Working Pressure Psi:
- 56
- Outlet Connection Size:
- 3/4 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Part Number:
- 556032
- Pressure Range:
- 75 to 150 PSI
- Pressure Relief Setting Psi:
- 75
- Pressure Steam Discharge Capacity:
- 200,000 BTU per hour
- Protection Type:
- Pressure
- Series:
- LF3L
- Temperature Relief Fahrenheit:
- 9999
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
- Brand Name:
- Watts
Watts LF3L-075 3/4 – Frequently Asked Questions
1) What size and thread does the Watts LF3L-075 relief valve connect to?
The LF3L-075 takes 3/4 inch NPT on both ends: male threaded inlet, female threaded outlet. So it threads straight into a 3/4 inch tapping on the tank or vessel, and you run your discharge line into the female outlet. No adapters needed if your piping is 3/4 NPT.
2) At what pressure does the Watts LF3L-075 pop off?
It's factory set to relieve at 75 psi. That's a fixed setting, not adjustable in the field, so pick the model whose set point sits above your normal system pressure and below the rated pressure of the vessel you're protecting. The LF3L family covers 75 through 150 psi set points, and the -075 is the low end of that range.
3) Is this Watts valve a pressure-only relief valve or does it also relieve temperature?
Pressure only. The LF3L-075 is a poppet type pressure relief valve, so it responds to overpressure and nothing else. If you need a combination T and P valve for a water heater, this is the wrong part, look for a temperature and pressure relief valve instead.
4) Can I use the Watts LF3L-075 on potable water lines?
Yes. The body is lead free copper alloy and the valve is flagged lead free, which is what you need for drinking water service under the federal lead free requirement. That's also why it carries the LF prefix in the model number.
5) What's the maximum temperature the LF3L-075 relief valve can handle?
210 degrees F is the top of its range, which covers domestic hot water and hydronic heating service. Its listed steam discharge capacity is 200,000 BTU per hour, so size your protected appliance's input against that figure before you commit.
6) Does the Watts LF3L-075 have a test lever?
It does. The test lever lets you manually lift the poppet off the seat to verify the valve isn't stuck and to flush debris from the seat, which most codes and manufacturers expect you to do periodically. Point the discharge line somewhere safe before you pull it, since 210 degree water can come out.
7) Is the Watts LF3L relief valve Buy American compliant for a government job?
Yes, the LF3L-075 is flagged Buy American Act compliant with USA origin, which is the box a federal, state, or institutional spec usually needs checked. Order it by Watts part number 556032.
8) I need a relief valve set higher than 75 psi. Does the LF3L come in other settings?
The LF3L series spans 75 to 150 psi set points, and the LF3L-075 is the 75 psi version. If your system runs above 75 psi in normal operation this one will weep or discharge constantly, so step up to a higher set point in the same series rather than fighting it.
How fast can I get the Watts LF3L-075 3/4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
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 LF3L-075 3/4 come with a warranty?
Absolutely. The Watts LF3L-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 LF3L-075 3/4?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Watts LF3L-075 3/4 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.