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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Boiler installation - flushing
I have a well-known firm installing a WB boiler today, to replace our
old boiler. They say that their normal way of doing things is to connect up the new boiler, add chemicals, and flush the system for an hour. Then drain and refill. This seems all wrong to me, and indeed the WB installation manual says: "A new appliance must only be used to assist the cleaning of a newly installed system." Surely, they should have flushed the system with the old boiler, or do a power flush? Any suggestions about what to do? |
#2
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Boiler installation - flushing
On Wednesday, 28 October 2020 14:15:28 UTC, GB wrote:
I have a well-known firm installing a WB boiler today, to replace our old boiler. They say that their normal way of doing things is to connect up the new boiler, add chemicals, and flush the system for an hour. Then drain and refill. This seems all wrong to me, and indeed the WB installation manual says: "A new appliance must only be used to assist the cleaning of a newly installed system." Surely, they should have flushed the system with the old boiler, or do a power flush? I believe so, but I'm no plumber. Any suggestions about what to do? If the old one's still in circuit, there is no mystery. If not, boiler pipes can be short circuited for pumping. NT |
#3
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Boiler installation - flushing
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#4
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Boiler installation - flushing
On 29/10/2020 22:20, Harry Bloomfield wrote:
brought next idea : If the old one's still in circuit, there is no mystery. If not, boiler pipes can be short circuited for pumping. I agree, really stupid to flush after a new install - that will flush into the new boiler. This is a well-known firm, that says they are part-owned by WB, and they will forward confirmation from WB that the procedure they have used is okay. So far, they haven't. |
#5
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Boiler installation - flushing
On 29/10/2020 23:04, GB wrote:
On 29/10/2020 22:20, Harry Bloomfield wrote: brought next idea : If the old one's still in circuit, there is no mystery. If not, boiler pipes can be short circuited for pumping. I agree, really stupid to flush after a new install - that will flush into the new boiler. This is a well-known firm, that says they are part-owned by WB, and they will forward confirmation from WB that the procedure they have used is okay. So far, they haven't. Are they fitting a magnetic filter to keep crud out of the new boiler ?. They should and might be relying on this to collect the rust particles. |
#6
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Boiler installation - flushing
Andrew pretended :
Are they fitting a magnetic filter to keep crud out of the new boiler ?. They should and might be relying on this to collect the rust particles. Noiler manufacturers seem to insist on one, for the warranty. They do only collect the rust particles - no use at all for collecting other debris, which can still obstruct a modern boilers water passages. So basically - if it needs flushing, it needs to be flushed before a new boiler is fitted. |
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