Secondary return with an already pumped system.
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Doitall wrote
This is meaningless without a diagram. (But I have just figured out what you mean
) The OP has already asked what a "check valve" is, so I wouldn't expect him to understand what you have wrote above or how the piping layout is arranged.
(And anyway it wouldn't work)
This is meaningless without a diagram. (But I have just figured out what you mean
) The OP has already asked what a "check valve" is, so I wouldn't expect him to understand what you have wrote above or how the piping layout is arranged.(And anyway it wouldn't work)
Doitall wrote
This is meaningless without a diagram. (But I have just figured out what you mean
(And anyway it wouldn't work)
I know different.
Why do you think it wont work.
Send me an E if you want a drawing.
To do this the OP would have to site his negative head pump in the loft close to the outlets. So the suction side of the pump will not be flooded and will be in negative head position.
This plan won't work. Plain and simple. Sorry.
Manufacturers advise siting the pump close to the base of the cylinder!
There's a couple of important reasons for this!
This plan won't work. Plain and simple. Sorry.
Manufacturers advise siting the pump close to the base of the cylinder!
There's a couple of important reasons for this!
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don't think drugs will help with this
norcon your possibly right on this not working but only if the header is lower than the bathroom taps
if the cold header is higher then would gravity not keep the pipework full?
and the neg pump with unvented - yes in hindsight unvented would negate the need for the pump
Don't be stupid, I was under the impression you may know a little bit about what was wanted, Obviously I'm mistaken.
The suction side has to be flooded or it wont work, it could be under the bath for example.
And siting a pump at the base of the cylinder is ideal, so if you know something that Stuart Turner doesn't perhaps you should spill the beans.
And Negative or Positive refers to the delivery, not the supply which must be in a flood position.
don't think anyone here is stupid! we are trying to find a solution to the OP's problem, by sharing ideas someone will come up with the way to do what is required
as I have suggested, this maybe possible with a header tank higher than any outlet
it is for the OP to tell us if this would be feasable, if it isn't then we can explore other ideas.
as I have suggested, this maybe possible with a header tank higher than any outlet
it is for the OP to tell us if this would be feasable, if it isn't then we can explore other ideas.
kevendgas said:
Read the above post.
Throttle the flow, as you must maintain the pressure.
How you going to do that on an open vented system
the pump is sited in the usual position at the base of the cylinder
You said that's not a good idea in an earlier post, and in any case you CANNOT use a booster pump as a secondary circuit pump.
Fit a timer to open the Solenoid
The mind boggles what you intend to do with that.
If you put a booster pump on an open vented cylinder return circuit, at best it will pump the water straight into the storage tank.
The Op has a negative head bathroom, with a negative head pump to supply it, he has asked if he can install a secondary circuit to save wasting water.
The answer is yes he can install a secondary circuit using a bronze pump, as would be normal, to overcome the negative head problem, he can re-connect the booster pump on a dead leg.
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The cylinder is open vented, if you put a booster pump and connect it to a secondary circuit, at best it will pump the water out of the cylinder, into the storage tank
Your getting there at last.
(but not quite) The highlighted bit is the clue.
How would pumping the water out of the cylinder be a good idea, I doubt the overflow would take it for starters
Yes I am, as well as bloody dangerous
So where are you suggesting putting the booster pump.
You said run a return from the delivery side of the booster pump back to the cylinder.
Forget the solenoid for a minute, what do you think will happen if the booster pump blasts water at say 3bar back into the copper cylinder.
A bronze pump does not deliver anything, it's circulates the water around the circuit, if part of pipework is installed with a negative head it will not fill with water.
You said run a return from the delivery side of the booster pump back to the cylinder.
Forget the solenoid for a minute, what do you think will happen if the booster pump blasts water at say 3bar back into the copper cylinder.
A bronze pump does not deliver anything, it's circulates the water around the circuit, if part of pipework is installed with a negative head it will not fill with water.
when you two have finished bitching between yourselfs
lets go back to the original problem.
if you start with a header in the loft above the height of the loft bathroom, then feed into the hot water cylinder located say on the first floor with a single check valve to stop backflow.
you then have a surrey flange fitted using the side takeoff for the return of your circuit .
at the same time bringing down a cold feed as well
you now have 2 flow (hot and cold) and 1 hot return from cylinder to loft bathroom
with a bronze circulator pump in the hot return
flow pipes now enters pump which has enough water (remember header position) and that then pumps water to bathroom taps
any reason this won't work ?
lets go back to the original problem.
if you start with a header in the loft above the height of the loft bathroom, then feed into the hot water cylinder located say on the first floor with a single check valve to stop backflow.
you then have a surrey flange fitted using the side takeoff for the return of your circuit .
at the same time bringing down a cold feed as well
you now have 2 flow (hot and cold) and 1 hot return from cylinder to loft bathroom
with a bronze circulator pump in the hot return
flow pipes now enters pump which has enough water (remember header position) and that then pumps water to bathroom taps
any reason this won't work ?
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