Watts LF1L-2 150-210 1/2 1/2 In Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 degree F, Test Lever, Short Thermostat

No. The LF1L-2 150-210 is a 1/2 inch valve: 1/2 inch male NPT inlet with a 1/2 inch female FPT outlet. Most residential and commercial storage water heaters are tapped 3/4 inch, so this one is for equipment with a 1/2 inch T&P tapping, not a standard 3/4 inch heater port. Check the tapping on the tank before you order.

The probe shank is 7/8 inch, which is the short thermostat version. That short element is meant for tappings where the thermostat only needs to clear the tank wall or fitting, not reach deep into the vessel. If your application calls for a long element that extends into the stored water, the 7/8 inch shank is the wrong pick.

It opens at 150 psi or 210 degrees F, whichever condition is reached first. It is a combination temperature and pressure device, so it protects against both an overpressure event and a runaway thermostat. Make sure 150 psi is at or below the rated working pressure of the vessel you are putting it on.

Yes. The body is a lead free copper silicon alloy and the valve is listed lead free, so it is intended for potable water service where low-lead content is required. That matters for domestic hot water on multi-family, healthcare, school, and hospitality jobs where inspectors look for lead free wetted parts.

Rated temperature steam discharge is 15,000 BTU per hour. Size it against the input rating of the appliance: the valve's relief capacity has to equal or exceed the heat input of the tank or heater it protects. On anything with a higher input than 15,000 BTU/hr, you need a larger-capacity T&P valve, not this one. This size is typically found on small point-of-use and low-input equipment.

The LF1L series covers settings from 75 to 150 psi; the specific LF1L-2 150-210 model is factory set at 150 psi. The setting is not field adjustable, so if your system needs a lower relief point you order a different setting in the series rather than changing this one.

It has a manual test lever so a maintenance tech can lift and flush the seat on a routine check, which is what most facility PM schedules call for on a T&P. Self closing means the valve reseats on its own once temperature and pressure drop back below the setpoint, instead of staying open until it is manually reset.