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Post by DIYDafty on Jan 12, 2021 23:09:51 GMT
techmate 2.3 now bought by stuart turner I think. About 7 years old.
Hadn't been in use for about 4 months. I switched it on yesterday and just heard a loud buzzing sound. Pump not turning. Pipework does suffer from airlocks as was installed by idiots from a certain country on the other side of europe... Ran water through with the pump switched off. Eventually it started and I thought it was ok.
Then today I saw the bast*rd is leaking from underneath when it is running.
I guess that means a new pump? Is there are point trying to open it and fix it?
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Post by crowsfoot on Jan 13, 2021 8:36:28 GMT
I would fit a new pump dd - they're not a long lived item, so at 7 years with poor installation I reckon it's done really well to last as long as it did.
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Post by DIYDafty on Jan 13, 2021 13:57:10 GMT
Cheers crowsfoot thats probably saved me a lot of time messing around with it. I think you're right I'll get new. I was wondering if there's much I can do to improve the pipework but I think its difficult? I'm showing the hot only in the diagram. Short of creating a new pipe right across the walk-in cupboard I can't see how to get rid of that loop in the airing cupboard. I know an automatic air valve risks dragging new air in but is it a good idea in this situation? For the past 7 years the pump always starts if used every day but takes about 5 minutes (thats a very long time when youre in the shower) to get to full power. Maybe 3 metres of head and fed by a flange. Cylinder is 50% taller than usual. Please see attached. Any comments gratefully received |
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Post by rocketmanbkk on Jan 13, 2021 13:59:09 GMT
Get a decent make & swap it
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Post by tomplum on Jan 13, 2021 14:08:50 GMT
as you already know the loop and the AAv are not a good idea, The rest looks ok and i suppose you also know the cold water tank needs to be no less than a meter above the shower head and also min of 50 gallons, With a good qual pump , that should work good,  |
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Post by DIYDafty on Jan 13, 2021 14:43:35 GMT
as you already know the loop and the AAv are not a good idea, The rest looks ok and i suppose you also know the cold water tank needs to be no less than a meter above the shower head and also min of 50 gallons, With a good qual pump , that should work good, Just don't know what I can do about that loop. How do other installs work? I mean the pump is on the floor and need to go across to the shower room so it has to go down after the pump. |
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Post by DIYDafty on Jan 13, 2021 14:51:17 GMT
I think I've got to leave that loop in. Would it be stupid to even try to fit an aav at the top of that loop - I could always manually close it with the cap?
EDIT: Well the insutrctions of the GRundfos don't say do or don't but they do say don't fit deadlegs which is what the aav would be so doesn't look good. Its definitely a no go Tom ?
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Post by DIYDafty on Jan 13, 2021 14:56:46 GMT
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Post by DIYDafty on Jan 13, 2021 15:54:22 GMT
Right and sorry for breaking my own record on multiple posts.....
I think I can get rid of that loop by having the pipe clipped at the back of the walk in cupboard at skirting height. I'm doing up the bathroom next to the shower so will be able to get to the wall behind the shower.
So then the hot will continually rise from the pump never going down. Does it matter about the cold? Less work and less pipes at the back of the cupboard if I can leave that running in the floor?
I'll replace like for like to start with and see how it goes and if as crap as before then will do the pipework change in a few weeks when I'm doing the new bathroom.
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Post by pb on Jan 13, 2021 16:21:25 GMT
I fitted AAV's in places that can pull air but what I do is put a non return valve in, that way air can escape but can't be dragged in.
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Post by DIYDafty on Jan 13, 2021 16:42:40 GMT
I fitted AAV's in places that can pull air but what I do is put a non return valve in, that way air can escape but can't be dragged in. Cheers PB. That's another option I could try. Would a double check valve be slightly better in this case because we don't care much about water flow through it as we would normally? Or should I get a single ? |
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Post by Plumbergirl on Jan 13, 2021 17:38:17 GMT
I fitted AAV's in places that can pull air but what I do is put a non return valve in, that way air can escape but can't be dragged in. Cheers PB. That's another option I could try. Would a double check valve be slightly better in this case because we don't care much about water flow through it as we would normally? Or should I get a single ? Single valve dafty |
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Post by DIYDafty on Jan 13, 2021 18:00:40 GMT
Cheers PB. That's another option I could try. Would a double check valve be slightly better in this case because we don't care much about water flow through it as we would normally? Or should I get a single ? Single valve dafty right single it is. Any clue as to why its better in this case? Any thanks a lot BTW |
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Post by dickpuller on Jan 13, 2021 18:15:23 GMT
Have you considered a Negative Head shower pump?
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Post by DIYDafty on Jan 13, 2021 18:26:14 GMT
Have you considered a Negative Head shower pump? Something to think about also. Thanks. If you were doing it based on that diagram (loft is dircetly above) where would you site the NH pump? In the loft? Hmm not sure how I'd get it flowing either. |
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