You may also like
1/2 In Lead Free Poppet Type Pressure Relief Valve, 150 psi, Test Lever
Manufacturer Resources
Product Specs
- Application:
- Water Heater
- Body Material:
- Lead Free Copper Silicon Alloy
- Gpm When Relieved:
- Does Not Apply to Product
- Inlet Connection Size:
- 1/2 IN
- Inlet Connection Type:
- Male Threaded
- Inlet Thread Type:
- NPT
- Maximum Temperature:
- 210°F
- Maximum Temperature Fahrenheit:
- 210
- Maximum Working Pressure:
- 113
- Outlet Connection Size:
- 1/2 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Pressure Range:
- 75 to 150 PSI
- Pressure Relief Setting:
- 150 PSI
- Pressure Relief Setting Psi:
- 150
- Pressure Steam Discharge Capacity:
- Does Not Apply to Product
- Protection Type:
- Pressure
- Series:
- LF53L
- Shank Length:
- Does Not Apply To Product
- Temperature Steam Discharge Capacity:
- Does Not Apply to Product
- Test Lever:
- Yes
- Thermostat Material:
- Does Not Apply To Product
- Thermostat Probe Length:
- Does Not Apply To Product
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
- UL Listing (Specs):
- 1-UL Listed
Watts 121443 – Frequently Asked Questions
1) Is the Watts LF53L 0121443 a T&P valve or pressure-only relief?
Pressure only. The LF53L 0121443 is a poppet type relief valve set at 150 psi, with no thermostat probe, so it protects against overpressure and will not respond to water temperature. If your water heater tag calls for a combination temperature and pressure relief valve, this is not the right part and you need a T&P valve with a thermostat probe instead. The LF53L is the one to use where a separate pressure-only relief is required, such as on a thermal expansion or storage application.
2) What size and thread connections does the Watts 0121443 relief valve have?
Inlet is 1/2 inch male NPT and the outlet is 1/2 inch female NPT. That means it threads straight into a 1/2 inch female tapping on the tank or line, and the discharge side takes a 1/2 inch male NPT nipple for your drain line down to within a few inches of the floor.
3) Is the Watts LF53L lead free for potable water?
The body is a lead free copper silicon alloy, so it is intended for potable water service. It also carries a UL Listing.
4) What temperature can the Watts 0121443 relief valve handle?
Rated to a maximum of 210 degrees F. That covers normal domestic hot water service, but the valve does not open on temperature, only on pressure at its 150 psi setting.
5) Can I get the Watts LF53L at a lower relief setting than 150 psi?
The 0121443 is factory set at 150 psi and the setting is not field adjustable. The LF53L series is built across a 75 to 150 psi range, so if your system needs a lower relief point, order the LF53L at that setting rather than trying to change this one.
How fast can I get the Watts 121443 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 121443 come with a warranty?
Absolutely. The Watts 121443 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 121443?
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 121443 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.