Water Heater Safety Valves
A water heater safety valve is a safety group fitted to the cold water inlet of an electric water heater; it relieves excess pressure from heated water expansion and prevents water flowing back into the mains.
It is used on electric water heaters, calorifiers and storage heaters. The product range includes a water heater safety valve with a locking mechanism.
Main Applications
- Electric water heaters
- Storage water heaters
- Small calorifiers
- Apartment and office water heaters
- Holiday home water heating
Technical Data
| Type | Water heater safety group |
|---|---|
| Functions | Pressure relief, backflow prevention (depending on model) |
| Lock | Locking mechanism (product range) |
| Connection | Depending on model (usually 1/2″ or 3/4″) |
| Set pressure | Depending on model |
| Body | Brass (depending on model) |
| Discharge | To a drain connection (depending on model) |
| Temperature | Depending on model |
Material Options
| Part | Water heater safety group | Fixed-set safety valve |
|---|---|---|
| Duty | Relief + backflow prevention | Relief only |
| Mounting | Cold water inlet | Device or tank |
| Body | Brass (depending on model) | Brass |
| Typical use | Electric water heaters | Combi boilers, closed circuits |
Which material? The discharge of a water heater safety valve must go to an open drain, and dripping during heating is normal; no isolating valve should be fitted between valve and heater. Values are confirmed per model.
Advantages
Protects the Heater
- Relieves overpressure
Backflow Prevention
- Mains hygiene
Locking Mechanism
- Against misuse
Compact
- On the inlet
Construction and Design Features
- Brass body
- Safety spring and disc
- Check valve
- Discharge outlet and lock
Send the heater type, connection size and mains pressure; we will confirm a suitable water heater safety valve from stock.
How to Choose?
- ConnectionDetermine the heater’s cold water inlet size.
- Mains pressureAdd a pressure reducer if it is high.
- Fluid and temperatureConfirm domestic water and heater type.
- DischargeConnect the outlet to a drain.
Complementary Products
Why ORFA?
Other Threaded Safety Valves
Flame Arresters
Flame arresters stop flashback on flammable gas lines and protect the line and equipment.
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Bronze Safety Valves
Bronze safety valves have a bronze body and threaded ends and open to protect the system when the set pressure is exceeded.
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Compressor Safety Valves
Compressor safety valves release excess pressure in air compressors and receivers to protect the equipment.
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Stainless Steel Safety Valves
Stainless steel safety valves have a stainless steel body and threaded ends and protect against overpressure.
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Brass Safety Valves
Brass safety valves have a brass body and threaded ends and protect heating and water systems against overpressure.
Details →
Fixed-Set Safety Valves
Fixed-set safety valves open at a pressure set in the factory that cannot be changed.
Details →Our Water Heater Safety Valves
ORFA supplies water heater safety valves in a range of pressure classes, sizes and connection types to suit your application. Descriptions, technical specifications, materials and dimension tables are available on each detail page.
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