Discuss No hot water on gravity system? in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Hi all. Any suggestion on possible causes?
Trapped air? Gate valve stuck?
Get a bit of hose pipe go up in your loft and go to the bigest header tank and the pipe that bends over it put the hose pipe in it and suck till you get water out this should clear the airlock. How old is the boiler?
Not running through hot tap
More likely to be an air lock as whoever did the work previously wouldn't have left it not running.
Blow the mains up through the hot
You're kidding right? I've had snapped gate valves left by many a previous plumber. Last one was just before Xmas. Shower pump not working properly. It was surging, I diagnosed some sort of blockage and found the gate valve on the cold feed snapped and almost shut but apparently the handyman that did some work when the problem started hadn't touched it! Must be a poltergeist then.
If it is an airlock, easiest way of clearing it is wet vac on the hot tap.
Rubber cones that you stick up the cold feed and vent. They vacuum the system, so you can change the gate valve with the tank full.
You're kidding right? I've had snapped gate valves left by many a previous plumber. Last one was just before Xmas. Shower pump not working properly. It was surging, I diagnosed some sort of blockage and found the gate valve on the cold feed snapped and almost shut but apparently the handyman that did some work when the problem started hadn't touched it! Must be a poltergeist then.
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