Pressure loss in new loft (unvented cylinder)

[ShaunCorbs]

Ideally you should still have 20lpm upstairs but let’s say 2 bar 15lpm is ok in the loft

 

[RS_2022]

All checked.

Ideally you should still have 20lpm upstairs but let’s say 2 bar 15lpm is ok in the loft

Ok so I've now checked -

Pressure at water meter - 3.5-4bar
Flow rate at water meter - 20lpm

Pressure outside tap - 3-3.5bar
Dynamic pressure outside tap - 2.5-3 bar
Flow rate outside tap - 20lpm

Pressure in 1st floor bathroom - 2.5 bar

Pressure in loft - 2.2bar
Flow rate in loft - 13 lpm (from a shower hose without the showerhead)

The flow rate seems to be dropping quite considerably from the outside tap to the 2nd floor, but I think pressure's probably okay..?

What do you think?

 

[ShaunCorbs]

They look just about there depends how much of a good shower you want

If your happy with first floor bathroom shower then you shouldn’t notice any difference

But if you do like a good shower only way is to control the water pressure yourself eg dab pump in my above link you can set it to 4 bar etc providing the issue is just your incoming mains water

 

[RS_2022]

They look just about there depends how much of a good shower you want

If your happy with first floor bathroom shower then you shouldn’t notice any difference

But if you do like a good shower only way is to control the water pressure yourself eg dab pump in my above link you can set it to 4 bar etc providing the issue is just your incoming mains water

Thank you. I do want a good, strong shower. Do you think installing a pump will be more effective than a mains pipe replacement in this scenario?

 

[ShaunCorbs]

It all depends on what the water supplier can give you, you already have a good supply I doubt your loosing / they can increase it by replacing the mains

 

[Ben-gee]

With a lot of showers being “eco’d” to 9lpm I would have thought 13 acceptable to any planet loving grown-up.

Seriously though, have you tried a proper air incorporating shower head, like Hansgrohe raindance etc? You’ll be surprised at the perceived differences…

 

[Timmy D]

Could be debris in the loft shower inlet filters