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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 | 0121475 |
| Discharge Capacity | 1695000 btuH |
| Factory Set Pressure | 100 psi |
| For Media | Water |
| Inlet Connection Size | 3/4" |
| Inlet Connection Type | Female Threaded |
| Inlet Thread Type | NPT |
| Lead Free | Yes |
| Maximum Working Pressure | 75 psi |
| Nsf Certifications | Nsf 372 |
| Operating Pressure Range | 50 psi to 150 psi |
| Operating Temperature Range | -40°F to +250°F |
| Outlet Connection Size | 3/4" |
| Outlet Connection Thread Type | Female Threaded |
| Outlet Thread Type | NPT |
| Overall Height | 4 1/2" |
| Overall Width | 2 3/4" |
| Pressure Range | 50 psi to 150 psi |
| Pressure Relief Setting | 100 psi |
| Product Datasheet | watts-lf174a-110-2.pdf |
| Product Type | Pressure Relief Valve |
| Series | LF174A Series |
Shipping Info:
| Ship weight (kg) | 0.58 |
| Ship height (cm) | 13.02 |
| Ship width (cm) | 6.35 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Factory Set Pressure | Overall Height | Inlet Connection Size | Connection Type | Outlet Connection Size | Discharge Capacity | Pressure Range | Inlet Thread Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
740-075 1 | 75 psi | 7 1/4" | 1" | Fnptf x FNPTF | - | 2649000 btuH | 30 psi to 75 psi | NPT | - | RFQ
|
![]() |
174-Z3-T 075 | - | - | - | - | - | 2055000 btuH | 30 psi to 150 psi | NPT | €669.28 | |
![]() |
LFN30 5-30 1/2 | - | - | 1/2" | - | - | - | 5 psi to 30 psi | NPT | €572.24 | |
![]() |
LFF116-23 0-30 1 1/4 | - | - | - | - | - | - | - | - | €3,442.43 | RFQ
|
![]() |
LF174A-100 1 | 100 psi | 5 3/4" | 1" | Fnptf x FNPTF | 1" | 2635000 btuH | 50 psi to 150 psi | NPT | €1,536.97 | |
![]() |
LF174A-125 1 | - | - | 1" | - | 1" | - | 50 psi to 150 psi | NPT | €1,331.26 | |
![]() |
LF140S3 150-210 1 | 150 psi | - | 1" | Fnptf x FNPTF | 1" | 3085000 btuH | - | - | €1,473.39 |
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WATTS LF174A-100 3/4 0121475 Pressure Safety Relief Valve, 3/4 Inch Size, 100 psi
€505.66 /unit





