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Product Specifications:
| Item | Temperature & Pressure Relief Valve |
| Application | Water Heaters |
| Asme Section Code | Section Iv |
| Auto Re-seating | Yes |
| Body Height | 5 5/8" |
| Body Width | 6 1/2" |
| Color | Bronze |
| Connection Type | FNPT x FNPT |
| D1 | 1.9 |
| D2 | 1.9 |
| Discharge Capacity | 1200000 btuH |
| Factory Set Pressure | 125 psi |
| Finish | None |
| For Media | Hot Water |
| H1 | 4.3 |
| Inlet Connection Size | 1 1/2" |
| Length Of Connection 1 | 1.66" |
| Length Of Connection 2 | 2.47" |
| Material | Bronze |
| Max. Operating Pressure | 150 psi |
| Max. Operating Temperature | 210°F |
| Max. Temp. | 210°F |
| Min. Operating Temperature | 32°F |
| Outer Pipe Dia. Connection 1 | 1.9" |
| Outer Pipe Dia. Connection 2 | 1.9" |
| Outlet Connection Size | 1 1/2" |
| Preset Temperature | 210°F |
| Product Datasheet | apollo-valves-18c5424125.pdf |
| Series | 18C Series Safety Relief Valves |
| Shank Length | Standard |
| Shape | Perpendicular |
| Size | 1 1/2" |
| Spring Material | Stainless Steel |
| Suitable For Cooling | No |
| Suitable For Heating | Yes |
| Suitable For Hot Tap Water | No |
| Suitable For Solar Heating | No |
| Surface Protection | None |
| Thermostat Length | 4" |
| V | 1.5 |
| Working Length Connection 2 | 2.1" |
| Z2 | 2.1 |
Shipping Info:
| Ship weight (kg) | 3.69 |
| Ship height (cm) | 39.88 |
| Ship length (cm) | 13.97 |
| Ship width (cm) | 10.92 |
| HS code | 8481400000 |
| Country of Origin | US |
Product Details:
- Auto Re-Seating (Yes)
Documentation:
Product Variants
| Product | Model | Connection Type | Factory Set Pressure | Body Height | Thermostat Length | Discharge Capacity | Body Width | Max. Temp. | Shank Length | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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18C5513125 | MNPT x FNPT | 125 psi | 5 5/8" | 3" | 1200000 btuH | 6 1/2" | 210°F | Standard | €693.88 | |
![]() |
18C5513150 | MNPT x FNPT | 150 psi | 5 5/8" | 3" | 1200000 btuH | 6 1/2" | 210°F | Standard | €840.39 | |
![]() |
18C5115125 | MNPT x FNPT | 125 psi | 5 5/8" | 5" | 205000 btuH | 6 1/2" | 210°F | Standard | €167.41 | |
![]() |
18C5125125 | FNPT x FNPT | 125 psi | 5 5/8" | 5" | 205000 btuH | 6 1/2" | 210°F | Standard | €141.41 | |
![]() |
18C5213125 | MNPT x FNPT | 125 psi | 5 5/8" | 3" | 500000 btuH | 6 1/2" | 210°F | Standard | €244.04 | |
![]() |
18C5314125 | MNPT x FNPT | 125 psi | 5 5/8" | 4" | 750000 btuH | 6 1/2" | 210°F | Standard | €381.59 | |
![]() |
18C5314150 | MNPT x FNPT | 150 psi | 5 5/8" | 4" | 750000 btuH | 6 1/2" | 210°F | Standard | €309.54 |
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APOLLO VALVES 18C5424125 Bronze Relief Valve with 4 Inch Element, 125 Psig, 1-1/2 Inch Size, 2 x FNPT
€802.57 /unit



