Discuss Megaflo cold feed hammering. in the UK Plumbing Forum | Plumbing Advice area at PlumbersForums.net
When was the system last serviced/checked? (Should be annually) The tank may just need the 'air bubble' inside the tank topping up. (This accommodates expansion but also acts as a water-hammer suppressor?)
I had a system boiler installed 6months ago and had the cylinder connected up. I assumed they serviced as part of installation but maybe not. I’ve recharged the air gap but made no difference. I’m on the ground floor so connected a hose to drain cock which was a step not on the cylinder. I’m getting hammer when I demand hot and flow fluctuating when I demand cold for around 30seconds not sure that helps diagnose.As above these need servicing annually ? , There are instructions you can follow to recharge the internal air gap if you feel compent ? this may help but please employ a G3 qualified engineer for parts and service work . Kop
Had a G3 engineer out yesterday, he said he’s not quite sure what it is. He’s said it definitely not water hammer, said to clean the PRV which I did which did nothing. But what did fix it was turning the nut on the end of the PRV 2 times. But I’m now worried if I’ve increased the pressure is it dangerous?It's could quite possibly be a faulty combination valve as I've stated a G3 qualified engineer is needed for work on these . Kop
No G3-qualified engineer I know would tell the customer to 'clean the PRV' themselves. They would do the job and check the pressure settings and safety devices as part of the job.Had a G3 engineer out yesterday, he said he’s not quite sure what it is. He’s said it definitely not water hammer, said to clean the PRV which I did which did nothing. But what did fix it was turning the nut on the end of the PRV 2 times. But I’m now worried if I’ve increased the pressure is ialift dangerous?
He wasn’t doing the job last night. He was local and swung by to diagnose as the videos and pics I sent didn’t help him. He just told me to give it a clean and if that fails he’s happy to change the PRV £90 part £70 labour. Maybe he felt comfortable telling me to do it as I’m a competent builder.No G3-qualified engineer I know would tell the customer to 'clean the PRV' themselves. They would do the job and check the pressure settings and safety devices as part of the job.
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