russbost
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| posted on 6/4/13 at 05:22 PM |
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quote:
Originally posted by paulf
I have a shower with 2 central heating pumps installed, I did not want a noisy pump or to much pressure so simply fitted 2 domestic heating pumps one
in the cold supply fed from the bottom of the cold tank and one into the hot outlet from the hot water tank .I did not need to use a flange outlet and
dip tube as I would if fitting a higher power pump but the output is sufficient for a good shower and the pumps can hardy be heard running.
I also actually have a Stuart turner 3 bar single pump with built in flow switch
in near new condition that I was going to fit but then never used so that could be an option if your interested in buying it .
Paul
Hi Paul
The pumps you've used , do they have built in flow valves? If not, how is the syatem triggered to pump. I'm wondering if they are
something like this
link
which appears to be basically a central heating pump with a flow switch fitted - this seems like it might do what I want & save messing around
with surrey flange etc. so far as I can see it's intended to simply fit in line in existing pipework. Anyone ever used one of these?
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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paulf
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| posted on 8/4/13 at 08:56 AM |
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I have used 2 normal central heating pumps with a pull switch on the ceiling to turn them on and off.I was going to fit a flow switch as well but
never got around to it , even if someone forgets to turn them off after use it doesn't appear to cause a problem as have been installed for
about 18 months and work fine.I did see the grundfoss ones in your link but ended up using 2 cheap tool station CH pumps ,I dont know if using one on
its own would work very well as if you have mains pressure cold water and pumped hot then the pressure differential may be to great for the mixer
valve to work correctly therefore I took a cold feed from the bottom of the header tank and the hot from the hot water tank outlet with the pump
mounted near the bottom of the tank.
Paul
quote:
Originally posted by russbost
quote:
Originally posted by paulf
I have a shower with 2 central heating pumps installed, I did not want a noisy pump or to much pressure so simply fitted 2 domestic heating pumps one
in the cold supply fed from the bottom of the cold tank and one into the hot outlet from the hot water tank .I did not need to use a flange outlet and
dip tube as I would if fitting a higher power pump but the output is sufficient for a good shower and the pumps can hardy be heard running.
I also actually have a Stuart turner 3 bar single pump with built in flow switch
in near new condition that I was going to fit but then never used so that could be an option if your interested in buying it .
Paul
Hi Paul
The pumps you've used , do they have built in flow valves? If not, how is the syatem triggered to pump. I'm wondering if they are
something like this
link
which appears to be basically a central heating pump with a flow switch fitted - this seems like it might do what I want & save messing around
with surrey flange etc. so far as I can see it's intended to simply fit in line in existing pipework. Anyone ever used one of these?
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paulf
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| posted on 8/4/13 at 09:03 AM |
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I have used 2 normal central heating pumps with a pull switch on the ceiling to turn them on and off.I was going to fit a flow switch as well but
never got around to it , even if someone forgets to turn them off after use it doesn't appear to cause a problem as have been installed for
about 18 months and work fine.I did see the grundfoss ones in your link but ended up using 2 cheap tool station CH pumps ,I dont know if using one on
its own would work very well as if you have mains pressure cold water and pumped hot then the pressure differential may be to great for the mixer
valve to work correctly therefore I took a cold feed from the bottom of the header tank and the hot from the hot water tank outlet with the pump
mounted near the bottom of the tank.
Paul
quote:
Originally posted by russbost
quote:
Originally posted by paulf
I have a shower with 2 central heating pumps installed, I did not want a noisy pump or to much pressure so simply fitted 2 domestic heating pumps one
in the cold supply fed from the bottom of the cold tank and one into the hot outlet from the hot water tank .I did not need to use a flange outlet and
dip tube as I would if fitting a higher power pump but the output is sufficient for a good shower and the pumps can hardy be heard running.
I also actually have a Stuart turner 3 bar single pump with built in flow switch
in near new condition that I was going to fit but then never used so that could be an option if your interested in buying it .
Paul
Hi Paul
The pumps you've used , do they have built in flow valves? If not, how is the syatem triggered to pump. I'm wondering if they are
something like this
link
which appears to be basically a central heating pump with a flow switch fitted - this seems like it might do what I want & save messing around
with surrey flange etc. so far as I can see it's intended to simply fit in line in existing pipework. Anyone ever used one of these?
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John P
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| posted on 8/4/13 at 10:56 AM |
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As far as I can see that would increase the cold water pressure but your hot supply would still depend on the head created by the cold tank.
If you were considering fitting this is the flow from the hot tank then you would really still need the surrey flange to ensure the suction side of
the pump doesn't draw in air from the vent pipe.
To be honest fitting the flange isn't really difficult and as a single impellor pump can simply sit on the floor next to the hot tank
there's not that much plumbing to do.
The only thing to be careful about is when removing the existing fitting from the top of the tank. I soaked mine in WD40 and it came out fairly
easily, just be careful not to damage the boss which is fitted to the tank as although the treaded portion is quite strong it's only mounted on
the thin copper of the tank.
John.
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russbost
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| posted on 8/4/13 at 11:41 AM |
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"The only thing to be careful about is when removing the existing fitting from the top of the tank. I soaked mine in WD40 and it came out fairly
easily, just be careful not to damage the boss which is fitted to the tank as although the treaded portion is quite strong it's only mounted on
the thin copper of the tank. "
That's the bit that was bothering me - I've played this game b4!
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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John P
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| posted on 8/4/13 at 12:25 PM |
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Whilst I'd still do it with the correct fitting I have just come across this advice on ukplumbersforums.co.uk (No idea how sound this advice is
though!)
______________________________________________________________________________________________
"Only ever fitted an Essex flange once (during training course) and had the same Surrey flange sitting on the van for nearly 4 years (still in
box) .
Fitted loads of Salamander shower pumps and always tee-ed off the horizontal run off the top of the cylinder.
Cut in to horizontal run and slide on a 22mm equal tee and angle the tee down at 45 degrees to "discourage" pump aeration but giving pump
hot feed primacy on system.
Continue feed in nice flowing bends where possible (or 45 degree elbows) and keep it in 22mm until just before pump then step down to 15mm at last
minute as it where.
Salamander pumps are more compact than the rest and are my favourite by a country mile (you can tell by the sheer weight of them that they are solid
machines). They can be squeezed into airing cupboards where others can't.
Yes,,,I know what I've said above contradicts the Salamander instructions,, but in my opinion those instructions have a degree of overkill and
are written for those who may have less understanding of fluidic flows and associated systems.
_______________________________________________________________________________________________
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russbost
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| posted on 8/4/13 at 01:08 PM |
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Yeah, I've seen some diagrams (might be on the salamander site, I've looked at so many now it's all a bit of a blur!) where they tee
into the top pipe from the tank at 45 degrees, I have to say I can't see why teeing in at 45 rather than in the vertical pipe makes it less
likely to pull air in from the vent. I'm going to take a look at the whole setup tomorrow, so will have a better idea then what I can do with
it!
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
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