Hose pipe - gravity question.

MisterNick

I have moved our hose pipe round the corner and lifted it for aesthetic and practical usage purposes. It is a newly installed tap.
There is a small loss of pressure since the move.
My thinking is that if I cut the pipe leading to the reel, the water would flow out of the tap, travel almost horizontally to the reel and the pressure would resume to as it was before.
Before I go ahead, is my logic correct?   

grumpy_codger

MisterNick said:

...
Before I go ahead, is my logic correct?   

No              

Doonhamer

Is the new tap the same as the old one? Maybe the new one has a double check valve inside which can reduce flow

vacheron

The minimum mains pressure in the UK is 1 bar. This equates to a 10 meter "head", which means that you would need to raise the hosepipe 10 meters in the air before the water would theoretically stop flowing

However mains water is usually 2-3 bar (20-30 meters) so this should not be noticable, unless as mentioned above, the hose is sourced from a tank?

Furthermore, it is the height of the spray nozzle that is the important part, not the reel, so you really shouldn't have seen any difference with a higher reel, provifing you are still watering with the nozzle at the same height?  

WIAWSNB

MisterNick said:

I have moved our hose pipe round the corner and lifted it for aesthetic and practical usage purposes. It is a newly installed tap.
There is a small loss of pressure since the move.
My thinking is that if I cut the pipe leading to the reel, the water would flow out of the tap, travel almost horizontally to the reel and the pressure would resume to as it was before.
Before I go ahead, is my logic correct?   

You could certainly cut that supply hose down in length for neatness, but it won't (shouldn't) affect the supply rate at all.

Are you sure the reduction in pressure you noticed isn't just down to the time of day? Mains flows can vary quite a bit depending on neighbouring demand.

That's a new outside tap, yes? Is it the same tap that was used when your reel was sitting on the ground, and you felt it had higher pressure? If so, then it's unlikely to be the tap itself as that hasn't changed. It's also unlikely to be the height of the reel, for reasons mentioned by others.

Was the hose extended the last time you had imporved pressure? If so, that could be because the freed hose would have the ability to swell to its maximum bore size, whereas a tightly-reeled hose will be partially contricted - squashed. It might even have a partial twist in it.

TELLIT01

Does the newly installed tap have an isolator valve somewhere.  If so it may be that the valve hasn't been opened fully.  Equally, as others have said, the design of the new tap may simply be restricting the flow slightly.

ic

What if you pull out the full reel of pipe?  If it was reeled back up without water in the pipe, the pipe has been rolled back up squashed a little reducing flow?  

MisterNick

Thanks to everybody for taking the time to respond.
I'm glad i asked. Normally i would go ahead and chop it off and then ask after why it hadn't worked.
We have had building works done and during this we had a couple more outside taps fitted, this being one of them. Although it looks the same tap, the original one is probably 10 years old. It's not a major problem, but I think I will take up the suggestion of unreeling it and reeling it back in. I'm not sure that one will stay there, we are stiill working on the logistics for the hose pipes. 

WIAWSNB

If you fully extend the hose, close the nozzle, and pressurise it by opening the tap for a few seconds, then you can reel it back in knowing the hose is fully inflated and also not twisted. Once fully reeled in, release the pressure by opening the nozzle. The actual hose will still have the 'inflated' space around it inside the reel, so should be pretty free-running.

ic

MisterNick said:

Thanks to everybody for taking the time to respond.
I'm glad i asked. Normally i would go ahead and chop it off and then ask after why it hadn't worked.
We have had building works done and during this we had a couple more outside taps fitted, this being one of them. Although it looks the same tap, the original one is probably 10 years old. It's not a major problem, but I think I will take up the suggestion of unreeling it and reeling it back in. I'm not sure that one will stay there, we are stiill working on the logistics for the hose pipes. 

What does the pipework look like inside the house?  Its not one of those self cutting taps with a small plastic tube connecting to the back of the tap is it? https://www.screwfix.com/p/essentials-outside-tap-kit-15mm-x-1-2-/33139. You can't beat a tap plumbed with 15mm pipe and a full bore isolator.

MisterNick

WIAWSNB said:

If you fully extend the hose, close the nozzle, and pressurise it by opening the tap for a few seconds, then you can reel it back in knowing the hose is fully inflated and also not twisted. Once fully reeled in, release the pressure by opening the nozzle. The actual hose will still have the 'inflated' space around it inside the reel, so should be pretty free-running.

Thanks, I'll give that a try. Could well be the case as the builders were all using it when they were here.

ic said:

MisterNick said:

Thanks to everybody for taking the time to respond.
I'm glad i asked. Normally i would go ahead and chop it off and then ask after why it hadn't worked.
We have had building works done and during this we had a couple more outside taps fitted, this being one of them. Although it looks the same tap, the original one is probably 10 years old. It's not a major problem, but I think I will take up the suggestion of unreeling it and reeling it back in. I'm not sure that one will stay there, we are stiill working on the logistics for the hose pipes. 

What does the pipework look like inside the house?  It's not one of those self cutting taps with a small plastic tube connecting to the back of the tap is it? https://www.screwfix.com/p/essentials-outside-tap-kit-15mm-x-1-2-/33139. You can't beat a tap plumbed with 15mm pipe and a full bore isolator.

Thanks, trouble is i can't really tell now as, internally, every thing is covered up now.