Specifications
Description
The Watts LF111L-175 1/2 is a lead-free pressure relief valve for tankless / thermal expansion service, factory set at 175 psi. It is rated to 175 psi. This model is certified lead-free for potable-water installations.
This 1/2 inch lead free pressure relief valve is designed for residential hot water supply applications and provides pressure relief protection only against thermal expansion in water. This valve consists of a lead free body with 1/2 inch NPT threaded male inlet and 1/2 inch NPT threaded female (drain) outlet, stainless steel pressure spring, and test lever. The pressure relief is set at 150 psi (10.34 bar).
Features
- Lead free body construction
- Pressure relief is set at 175 psi
- 1/2" male NPT inlet by 1/2" female (drain) outlet
- Test lever included
Common Questions
- What pressure is this valve set to?
- It is factory set to relieve at 175 psi. The setting is fixed and is not field-adjustable.
- Can I use this on potable water?
- Yes. It is certified lead-free to NSF/ANSI 372, which is what plumbing codes require for any device in a drinking-water line.
- Does the discharge have to be piped?
- Yes. Codes require the outlet to be piped full-size to a safe point of discharge, terminating with an air gap and no valve, cap, or reducer anywhere in the line — a relief valve that cannot discharge freely is not protecting anything. The manual test lever should be operated at least annually to confirm the valve is not seized.
Specifications
- Type: Relief
- Connection: MNPT
- Max Pressure (psi): 175
- Pack Quantity: 50
- Country of Origin: United States
- Warranty: 1 Year Limited
- MPN: LF111L-175 1/2
- Lead-Free: Yes
- Relief Type: Pressure Only
- Factory Set Pressure (psi): 175
- Application: Tankless / Thermal Expansion
- Shank Length: Standard
- Connection Configuration: MNPT inlet x FNPT outlet
- Manual Test Lever: Yes
- Approved for Potable Water: Yes
- SentryPlus Alert Flood Sensor: No
Product Information
| SKU | UPC | Country of Origin | Warranty |
|---|---|---|---|
| 0121748 | 098268591057 | United States | 1 Year Limited |
Dimensions
| End Connection | MNPT | Shank Length | Standard |
Details
| Series | 111L | Device Type | Relief |
| Lead Free | Yes | Max Pressure PSI | 175.0 psi |
| Pack Qty | 50 | Relief Type | Pressure Only |
| Set Pressure PSI | 175.0 psi | Application Class | Tankless / Thermal Expansion |
| Connection Config | MNPT inlet x FNPT outlet | Test Lever | Yes |
| Potable Approved | Yes | — | — |
Compare with similar products
| Relief Type | Pressure Only
| Pressure Only
| Pressure Only
| Pressure Only
| Pressure Only
| Pressure Only
|
| Set Pressure PSI | 175.0 psi | 125.0 psi | 125.0 psi | 150.0 psi | 150.0 psi | 75.0 psi |
| Application Class | Tankless / Thermal Expansion
| Tankless / Thermal Expansion
| Tankless / Thermal Expansion
| Tankless / Thermal Expansion
| Tankless / Thermal Expansion
| Tankless / Thermal Expansion
|
| Shank Length | Standard
| Standard
| Standard
| Standard
| Standard
| Standard
|
| Connection Config | MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
|
| Test Lever | Yes | — | Yes | — | Yes | Yes |
| Potable Approved | Yes | — | — | — | Yes | Yes |
| Series | 111L
| 111
| 53L
| 53
| LF53L
| LF3L
|
| Country Of Origin | United States
| United States
| United States
| United States
| United States
| United States
|
| Warranty | 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
|
| Spec Sheet | — | — | ||||
| Install Sheet | — | — | ||||
| Device Type | Relief
| Relief
| Relief
| Relief
| Relief
| Relief
|
| Size Nominal | — | 1/2"
| 1/2"
| 3/4"
| 1/2"
| 3/4"
|
| Inlet Size | — | 1/2"
| 1/2"
| 3/4"
| 1/2"
| 3/4"
|
| Outlet Size | — | 1/2"
| 1/2"
| 3/4"
| 1/2"
| 3/4"
|
| Lead Free | Yes | — | — | — | Yes | Yes |
| End Connection | MNPT
| MNPT
| MNPT
| NPT
| MNPT
| NPT
|
| Body Material | — | Bronze
| Bronze
| Bronze
| — | — |
| Max Pressure PSI | 175.0 psi | 125.0 psi | 150.0 psi | 175.0 psi | 150.0 psi | 150.0 psi |
| Certifications | — | — | ANSI Z21.22, CSA 4.4
| ANSI Z21.22, CSA 4.4
| ANSI Z21.22, CSA 4.4
| ASME Section XIII (HV), ANSI Z21.22, CSA 4.4
|
| Pack Qty | 50
| 50
| 50
| 50
| 50
| 50
|
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