Filling loop and Megaflow low pressure

[Samandharv]

As above, also, there is no PRV on that system, is it fed from the mains or from a upstairs cistern?.

Hi this is mains fed

 

[terryplumb]

If you open the other valve ,does water flow out ?

 

[Samandharv]

If you open the other valve ,does water flow out ?

Yes that does also

 

[Johntheo5]

Where ever the NRV is, shouldn't the arrow on it point in the direction of the filling flow so you shouldn't get water from both isol valves with hose removed??

 

[terryplumb]

Assuming the flexible hose allows water to flow through it ,that would point to a lack of pressure. What is the mains cold water pressure like ? If you connect the hose to the valve that you replaced and direct it to a bucket ,open it and let water flow ,does it flow out under good pressure ? If you try to stop the flow from the hose by clamping your thumb over the hose end ,can you stop the flow ?

 

[Samandharv]

Where ever the NRV is, shouldn't the arrow on it point in the direction of the filling flow so you shouldn't get water from both isol valves with hose

Assuming the flexible hose allows water to flow through it ,that would point to a lack of pressure. What is the mains cold water pressure like ? If you connect the hose to the valve that you replaced and direct it to a bucket ,open it and let water flow ,does it flow out under good pressure ? If you try to stop the flow from the hose by clamping your thumb over the hose end ,can you stop the flow ?

Where ever the NRV is, shouldn't the arrow on it point in the direction of the filling flow so you shouldn't get water from both isol valves with hose removed??

Ok so removing the hose testing the NRV no water. Turning the NRV water flows fast which I cannot stop with my thumb.

 

[terryplumb]

Makes no sense to me. If water is flowing through both valves ,and under good pressure ,then it has to be going into the system.

 

[Samandharv]

Makes no sense to me. If water is flowing through both valves ,and under good pressure ,then it has to be going into the system.

Same, I guess return the filling loop and start again.

 

[terryplumb]

From what you have told us the filling loop is doing what it should ,allows water to flow through it. At the isolation valve on the heating pipe ,show us a close up pic of that valve.
And if you open that valve do you get water flowing out of the system under good pressure?

 

[Samandharv]

From what you have told us the filling loop is doing what it should ,allows water to flow through it. At the isolation valve on the heating pipe ,show us a close up pic of that valve.
And if you open that valve do you get water flowing out of the system under good pressure?

Going to sound dumb now sorry which valve is this one. The one which is on in the original pic?

 

[terryplumb]

There are 2 valves in your original pic. You told us you replaced the one on the mains cold feed ( the longer of the two ,and you would have had to turn off your mains cold water to do that) . The other ,smaller valve, is connected to the heating circuits pipework.
You have told us that both of these valves ,when opened, allow water to flow from them ??

 

[Samandharv]

There are 2 valves in your original pic. You told us you replaced the one on the mains cold feed ( the longer of the two ,and you would have had to turn off your mains cold water to do that) . The other ,smaller valve, is connected to the heating circuits pipework.
You have told us that both of these valves ,when opened, allow water to flow from them ??

Got it thanks, yes flow from this feed is fast

 

[terryplumb]

When did you open that valve to test the flow coming out of it ?
If you connect up the filling loop ,open both the valves and leave it like that for 1 full minute ,what's the result ?

 

[Samandharv]

When did you open that valve to test the flow coming out of it ?
If you connect up the filling loop ,open both the valves and leave it like that for 1 full minute ,what's the result ?

About 1 hour ago when I disconnected from the hot water feed and put the hose into a bucket to test this pressure/ valve. At the same time I turned the NRV into a large jug to test this pressure. Now leaving for a minute to see what happens…

 

[Samandharv]

When did you open that valve to test the flow coming out of it ?
If you connect up the filling loop ,open both the valves and leave it like that for 1 full minute ,what's the result

When did you open that valve to test the flow coming out of it ?
If you connect up the filling loop ,open both the valves and leave it like that for 1 full minute ,what's the result ?

No change after a few minutes