Gas geyser fittings: valves, connectors and the relief valve
A gas geyser connects to your home through a gas valve and connector, a cold water inlet, a hot water outlet, a drain valve and a pressure relief valve. Correct fittings make the geyser safe to service and stop leaks; a missing or blocked relief valve is dangerous.
The fittings and their jobs
| Fitting | Job |
|---|---|
| Gas isolation valve | Shuts gas to the geyser for service or emergencies |
| Gas connector | Rigid pipe or approved flexible hose to the gas valve |
| Cold inlet valve | Shuts water to the tank |
| Hot outlet | Feeds the house hot water lines |
| Unions | Let the geyser be removed without cutting pipes |
| Drain valve | Empties the tank and flushes sediment |
| Pressure relief valve | Releases water if pressure or temperature is too high |
Checking for gas leaks
Brush soapy water on gas joints with the gas on. Growing bubbles mean a leak: close the gas valve and get it fixed. Never use a flame to look for a leak.
Water leak points
Most water leaks are at unions, the drain valve or the relief valve, and are simple to fix. A leak from the tank body is a different matter; see our guide to leaking geysers.
Good practice
- Use gas-rated hoses and replace cracked ones.
- Keep the gas isolation valve reachable.
- Pipe the relief valve outlet somewhere safe and never cap it.
Frequently asked questions
What is the pressure relief valve for?
It releases water if the tank’s pressure or temperature gets too high, preventing the tank from bursting.
Can I use any hose for gas?
No. Use gas-rated pipe or hoses and replace them if cracked or hardened.
Get the price, photos and details for your city
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