Megaflo System Problems

bungledoe said:

Hi,

I have leak with my water / central heating system. It's 3 years old now in a new build flat.

The leak is coming from something called the Cold Water Combination Valve. It's a very slow drip at the moment.

The system has a Megaflo CL145 unvented cylinder and above that is a varem expansion tank.

The pressure gauge connected to the varem is reading ok for PSI but 0 for bar.

This makes no sense, I suspect you're looking at the red 'target cold pressure' needle and thinking this is a pressure reading, which it isn't. The black needle shows your pressure reading, if this is at 0 then it needs topping up although it is probably not connected to your leak as the leak is on the services to the taps and the pressure gauge shows central heating pressure

This makes no sense, I suspect you're looking at the red 'target cold pressure' needle and thinking this is a pressure reading, which it isn't. The black needle shows your pressure reading, if this is at 0 then it needs topping up although it is probably not connected to your leak as the leak is on the services to the taps and the pressure gauge shows central heating pressure


I've tried regenerating the airgap in the system a couple of times but its not helped. I think the 0 bar reading is my problem.

Although it isn't your problem, think about what you're saying here. You think that you have a leak with a zero pressure reading? Do you really think that increasing pressure is going to make the leak go away? As it happens it's a leak on a different system so that's actually irrelevant, but always good to try to encourage some logical thinking IMHO

Water pressure seems fine and I have hot / cold water as well as heating.

Hear an occasional loud bang when running the hot water not often though.

Photos attached of the system here:

//www.diynot.com/network/bungledoe/albums/

Can anyone help me??

Thanks

Bungle

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