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Hi all.
Bit of a long story so please bear with me.
A new customer of mine called me a few months back wanting me to take a look at his shower in his en-suite. Basically the plumber who had installed the shower was an idiot as he'd connected a thermostatic mixer shower to tank fed hot and mains fed cold. To make matters worse, the tank was around 1 metre above the shower, resulting in the shower not working at all basically.
Around 2 months earlier, the customer told me that British Gas had fitted a nice new condensing boiler in his property. He had called them for advice re the shower and they had suggested a whole house pump to fix the issue. This is the point when he called me.
On looking around his central heating install (being nosy I guess) I could see a lot of radiators without TRVs. I did a flow rate test on the kitchen tap and got 12L/m. I then checked the cold isolation valve underneath and noticed it was only half open. Opened it fully and got 20L/m from the kitchen tap (cold only). Next I opened the garden tap and ran both on full and still obtained 20L/m at the kitchen tap. I figured incoming mains flow rate was at least 30L/m as a result. Mains pressure was around 4.5 bars.
I told him that I could fit him a whole-house pump but it would be better to just fit the right boiler for his situation in the first place, i.e. a powerful combi-boiler.
British Gas had apparently told him he couldn't have a combi-boiler (his preferred choice) as they had measured the flow rate at 5L/m and 8L/m entering his property. Bear in mind that these flow rates are below the minimum acceptable allowed by the water supplier.
I think that they did an incorrect flow rate test and also didn't notice that the isolation valve on the kitchen tap was only half open. I finally installed a Broag 39KW combi-boiler for him and fitted TRVs to the rest of the radiators. His gas bill has (unsurprisingly) dropped dramatically without having a hot water cylinder. He is in dispute with BG to try and get his money back and I want to help him as much as I can (they were great customers to be honest).
Does anyone else have any thoughts or ideas on this? I've never experienced flow rates below 10L/m in any property and I think he was totally mis-advised by a fairly incompetent engineer. It also worries me that they broke the law by not fitting TRVs as part of the install.
Bit of a long story so please bear with me.
A new customer of mine called me a few months back wanting me to take a look at his shower in his en-suite. Basically the plumber who had installed the shower was an idiot as he'd connected a thermostatic mixer shower to tank fed hot and mains fed cold. To make matters worse, the tank was around 1 metre above the shower, resulting in the shower not working at all basically.
Around 2 months earlier, the customer told me that British Gas had fitted a nice new condensing boiler in his property. He had called them for advice re the shower and they had suggested a whole house pump to fix the issue. This is the point when he called me.
On looking around his central heating install (being nosy I guess) I could see a lot of radiators without TRVs. I did a flow rate test on the kitchen tap and got 12L/m. I then checked the cold isolation valve underneath and noticed it was only half open. Opened it fully and got 20L/m from the kitchen tap (cold only). Next I opened the garden tap and ran both on full and still obtained 20L/m at the kitchen tap. I figured incoming mains flow rate was at least 30L/m as a result. Mains pressure was around 4.5 bars.
I told him that I could fit him a whole-house pump but it would be better to just fit the right boiler for his situation in the first place, i.e. a powerful combi-boiler.
British Gas had apparently told him he couldn't have a combi-boiler (his preferred choice) as they had measured the flow rate at 5L/m and 8L/m entering his property. Bear in mind that these flow rates are below the minimum acceptable allowed by the water supplier.
I think that they did an incorrect flow rate test and also didn't notice that the isolation valve on the kitchen tap was only half open. I finally installed a Broag 39KW combi-boiler for him and fitted TRVs to the rest of the radiators. His gas bill has (unsurprisingly) dropped dramatically without having a hot water cylinder. He is in dispute with BG to try and get his money back and I want to help him as much as I can (they were great customers to be honest).
Does anyone else have any thoughts or ideas on this? I've never experienced flow rates below 10L/m in any property and I think he was totally mis-advised by a fairly incompetent engineer. It also worries me that they broke the law by not fitting TRVs as part of the install.
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