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Post by Deleted on Dec 22, 2017 15:34:59 GMT
Pulled these tanks out and for anyone who hasn't seen a combined set up, here you go. Attachment Deleted |
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Post by tomplum on Dec 22, 2017 16:32:34 GMT
nice one PB, it must be warm in Surrey, no insulation on tanks nor pipes,  |
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Post by crowsfoot on Dec 22, 2017 17:33:15 GMT
I've come across it only on a few occasions before and must admit the first time it alarmed me that the boiler didn't have an expansion pipe.
Decided that I wasn't going to meddle with it because I could see the reason why it had been done (stopping a pump over).
Is this a legal plumbing method though?
Anyone been taught to do this at collage?
Any boiler manufactures ever specified this method or is it of plumbers own invention?
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Post by crowsfoot on Dec 22, 2017 17:35:44 GMT
nice one PB, it must be warm in Surrey, no insulation on tanks nor pipes, Looks a very clean roof space too! That's reminded me of a true story about a clean roof space. |
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Post by Deleted on Dec 22, 2017 18:58:32 GMT
I come across more with the vent pipe and feed pipe combined, lots were done round this way like that in the 80's.
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Post by crowsfoot on Dec 22, 2017 19:56:04 GMT
Quite possible then it was a recognised method (in that era), just not very much done in the area that I work in.
When you think about it the planet earth is this systems expansion vessel!!
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Post by Deleted on Dec 22, 2017 20:07:40 GMT
Quite possible then it was a recognised method (in that era), just not very much done in the area that I work in. When you think about it the planet earth is this systems expansion vessel!! Sorry tappy when I say they are combined I mean the combined method with the vent over the top of the tank but still part of the feed, I don't come across many like in the picture.  |
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Post by tomplum on Dec 22, 2017 20:15:10 GMT
I used to be a service engineer for Servowarm, they were pioneers in strange methods including,
combined feed and expansion in 15mm
a corner gresian vase as a expansion tank
the servowarm diverter valve ( non electric)
bottom entry flow into the cylinder
the very first therastic gas valve, ( the flame adjusted as the boiler got hot)
the very first fan flued boiler ( the sorrento) a pig to srvice,
they were leaders in the industry all these ,then, strange methods are carried on except the combined flow and vent, and strangley enough, the bottom flow cylinder heating coil, it realy worked better and quieter,
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Post by crowsfoot on Dec 22, 2017 20:23:52 GMT
Quite possible then it was a recognised method (in that era), just not very much done in the area that I work in. When you think about it the planet earth is this systems expansion vessel!! Sorry tappy when I say they are combined I mean the combined method with the vent over the top of the tank but still part of the feed, I don't come across many like in the picture.  Right, got you now and yes that teed in cold feed to the expansion was done a lot in my area too - I reckon that this was just cheapskate gaffers trying to save a couple of meters ££ worth of pipe. rather than any plumbing reason  |
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Post by Deleted on Dec 22, 2017 20:32:16 GMT
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Post by crowsfoot on Dec 22, 2017 20:32:28 GMT
I used to be a service engineer for Servowarm, they were pioneers in strange methods including, combined feed and expansion in 15mm a corner gresian vase as a expansion tank the servowarm diverter valve ( non electric) bottom entry flow into the cylinder the very first therastic gas valve, ( the flame adjusted as the boiler got hot) the very first fan flued boiler ( the sorrento) a pig to srvice, they were leaders in the industry all these ,then, strange methods are carried on except the combined flow and vent, and strangley enough, the bottom flow cylinder heating coil, it realy worked better and quieter, I can remember servowarm and some of the things you mention above I've come across. I loved that diverter valve idea, simplicity itself (hardly anything to go wrong). Filling a system by hand from what looked like a flower vase on the wall is something else I can also remember doing. |
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Post by tomplum on Dec 22, 2017 20:32:57 GMT
to my learning stelrad brought in the 22mm combined feed and vent when they made the early low content heat exchanger, because the water inside moved very quick it needed the pump on the 3 setting, this dragged air down the vent and caused problems, that was the reason as I understand it,  |
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Post by crowsfoot on Dec 22, 2017 20:42:43 GMT
Thanks for that tom, it's the only official explanation I've ever heard of this one and I'm going to go with it from now on. It makes sense and it's logical (two very important factors in plumbing me thinks). |
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Post by Deleted on Dec 22, 2017 20:48:38 GMT
Certainly makes some sense. smiley-talk002 3 amigos
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Post by tomplum on Dec 22, 2017 22:11:01 GMT
A common thing with the flower vase was to put a plastic duck in it, when you could no longer see the duck, it was time to top up the vase with a jug of water,
It was a simple system to fit, there was no wiring at all, the boiler had the pump inside and the clock/programmer was internal, so the boiler had a plug which fitted in a socket and off you went,
perfect for a one day installation which was a big selling point in those times,
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