Plumbing

Vaillant ecotec boiler cutting out during shower after new mixer tap installed

Anonymous user 16/03/2024 - 3.30 PM

I have recently had a new shower head installed in my shower. Since this has happened, the boiler (which in a Vaillant ecotec that has been serviced twice since the issue started) has started cutting out. What will happen is: 1. Shower turned on - normal water temperature/ pressure 2. Run for a few minutes - hot water will cut out, water pressure will increase but only cold water 3. Run another minute - all water pressure cuts out to a trickle. Tap needs to be turned off and on A few more details: * The taps are thermostatic (as the plumber thought they might work better than the original taps I bought). * The water is coming from a gravity fed tank on the roof. Edit - I am in a block of flats, so can't change the tank or move to use mains pressure. The tank is large enough to supply water to the bathrooms of 6 small flats and previously the pressure from the tank was enough to maintain the water temperature - this has only happened since changing the taps * If the shower head is lowered to the bath the issue doesn't occur. * This problem didn't happen until the taps were changed My plumber hasn't been able to offer any reasons for why this could be happening and has suggested I get a pump installed. I'm not sure if this will solve the problem and don't want to spend all of that money if it doesn't fix the problem. Edit (as i can't respond to answers) - the building isn't a council building, but is Victorian. The tank is maintained annually and is very clean. I was told the taps would work with the low pressure, but I didn't buy them so can't check. I had originally installed taps that would work with 0.5 bar, but these weren't thermostatic so the plumber advised changing them to a thermostatic tap.