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Product Specifications:
| Item | Pressure Relief Valve |
| Application | Hot Water Space Heating Boiler |
| Asme Section Code | Section Xiii |
| Body Material | Copper Silicon Alloy, Lead Free Copper Silicon Alloy |
| Buy American Act Compliant | Yes |
| Connection Type | Fnptf x FNPTF |
| Cross Reference | 0121524 |
| Discharge Capacity | 5370000 btuH |
| Factory Set Pressure | 125 psi |
| For Media | Water |
| Inlet Connection Size | 1 1/4" |
| Inlet Connection Type | Female Threaded |
| Inlet Thread Type | NPT |
| Lead Free | Yes |
| Max. Working Pressure | 94 psi |
| Nsf Certifications | Nsf 372 |
| Operating Pressure | 30 psi to 150 psi |
| Operating Temp. | -40°F to +250°F |
| Outlet Connection Size | 1 1/4" |
| Outlet Connection Thread Type | Female Threaded |
| Outlet Thread Type | NPT |
| Overall Height | 8 1/2" |
| Overall Width | 4 1/4" |
| Pressure | 30 psi to 150 psi |
| Pressure Relief Setting | 125 psi |
| Product Datasheet | watts-lf174a-110-2.pdf |
| Product Type | Pressure Relief Valve |
| Series | LF174A Series |
Shipping Info:
| Ship weight (kg) | 2.43 |
| Ship height (cm) | 21.27 |
| Ship width (cm) | 12.07 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Inlet Connection Size | Pressure | Inlet Thread Type | Inlet Connection Type | Lead Free | Outlet Connection Size | Outlet Thread Type | Series | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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174-Z3-T 075 | - | 30 psi to 150 psi | NPT | Female Threaded | - | - | - | - | €669.28 | |
![]() |
LFN30 5-30 1/2 | 1/2" | 5 psi to 30 psi | NPT | Male Threaded | Yes | - | FPT | - | €572.24 | |
![]() |
LFF116-23 0-30 1 1/4 | - | - | - | - | - | - | - | - | €3,442.43 | RFQ
|
![]() |
LF174A-125 1 | 1" | 50 psi to 150 psi | NPT | Female Threaded | Yes | 1" | NPT | LF174A Series | €1,331.26 | |
![]() |
LF174A-75 1 | 1" | 30 psi to 150 psi | NPT | Female Threaded | Yes | 1" | NPT | LF174A Series | €1,648.19 | |
![]() |
LF174A-100 1 1/4 | 1 1/4" | 30 psi to 150 psi | NPT | Female Threaded | Yes | 1 1/4" | NPT | LF174A Series | €2,193.64 | |
![]() |
LF174A-75 1 1/4 | 1 1/4" | 30 psi to 150 psi | NPT | Female Threaded | Yes | 1 1/4" | NPT | LF174A Series | €3,089.32 |
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WATTS LF174A-125 1 1/4 0121524 Pressure Safety Relief Valve, 1-1/4 Inch Size, 125 psi
€1,895.84 /unit



