Not happy with with new unvented system, although it works fine. Shower pressure issue

[kash]

To do that you'll need basically your old set up refitting just for that shower, then a way of heating a cylinder. If you're using a 4 bar pump, you'll be needing a decent size cylinder to supply this also....you're already in to a decent amount of cost to do that.

Seems madness to me. Are you not just being unrealistic about the performance of the shower? Surely if the cylinder has been fitted correctly and everything else is correct - Pipe sizing, filters clean, pressure, then you'll be getting more than a decent shower out of an Unvented HW system.

I almost agree with you here. He said its perfectly normal, but its just hard when you from from an awesome shower to an OK shower. as I said, perfectly happy with the other shower and taps, it's just think one becuase of the size of the head. As i've had high expections of the shower previously in comparision, i think im just a little underwhelmed. I might post clips from the performance before and after the install.

My plumber suggested somehting similar..... I was thinking if he does it for say £2-300 i'd probably do it, as at the moment, its acceptable with no other outlets on. I've not yet tested with with say a kitchen tap and the other shower, and the washing machine on and a toilet being flashed. I imagine it would drop a fair bit! I think 100L should do it as I had 2 80L tanks before and that was fine for a few showers.

 

[Steve Lindsey]

I almost agree with you here. He said its perfectly normal, but its just hard when you from from an awesome shower to an OK shower. as I said, perfectly happy with the other shower and taps, it's just think one becuase of the size of the head. As i've had high expections of the shower previously in comparision, i think im just a little underwhelmed. I might post clips from the performance before and after the install.

My plumber suggested somehting similar... I was thinking if he does it for say £2-300 i'd probably do it, as at the moment, its acceptable with no other outlets on. I've not yet tested with with say a kitchen tap and the other shower, and the washing machine on and a toilet being flashed. I imagine it would drop a fair bit! I think 100L should do it as I had 2 80L tanks before and that was fine for a few showers.

Have you tried changing your shower head?

 

[gpbeck]

Fit a smaller size shower head and save the planet.

 

[kash]

Fit a smaller size shower head and save the planet.

Useful response


For others- here are pics of the set up in the loft

 

[EvilDrPorkChop]

Useful response


For others- here are pics of the set up in the loft

Well seeming the materials to do that will cost more than £2-300 I don't think you've got any chance there.

Can you see the size of the pipe incoming to the combination valve? (The one next to the white vessel which is brass colour). With all the insulation it's difficult to see pipe sizes.

But first off, it doesn't appear they've done balanced cold supplies. Which won't help.

 

[kash]

Hey

Well seeming the materials to do that will cost more than £2-300 I don't think you've got any chance there.

Can you see the size of the pipe incoming to the combination valve? (The one next to the white vessel which is brass colour). With all the insulation it's difficult to see pipe sizes.

But first off, it doesn't appear they've done balanced cold supplies. Which won't help.

I’ll have a look again or ask the plumber when i can.

How can you tell it’s not balanced on the cold supplies?

 

[Gasmk1]

becasue he would have taken the balanced cold feeds fron then combination valve the rear tapping

 

[kash]

Bit of an update as I've properly used both showers today simultaniously for the 1st time since the new set up was installed.

-Main shower on with nothing else on - was ok.
-2nd shower went on - pressure dropped a little as expectd- but still just about ok but little weak
-Toilet flushed and tap opened - water stopped flowing in both showers. mrs was NOT HAPPY as she was taking a shower haha.

I cant deal with that.

Spoken to the plumber in regards to a solution.
Appears that an accumulator, whilst ideal, wont work as the size of tank needed just wont be fit sensibily or logistically.

The suggestion is to re-install a pair water storage tanks back into the level 2 loft, and if i understand correctly will work in the following way:

-Both showers will be fed via the twin shower pump from cold tank level 2 and hot unvented cylinder on level 1.
-incoming mains supply will top up the cold tanks on level 2 as they empty
-hot water will be pumped from hot unvented cylinder for everywhere else using a 2nd sinlge pump that we used before (I think this is what he said but i might be wrong about that.)

How does this solution sound? He said this will effectly work as its a breaker tank. Just need to work out costs. I know it will be a bit but I dont really have a choice.

A little dissapointed tbh as I kind of wish I had just stuck with the original set up which did what it needed to do and fairly well. All the research I did and people I spoke to though suggested that the new unvented system was the way forwards..... cant help but feel like it was money wasted at the moment.

I aslo asked what the flow rate was and it was circa 13-15L per minute at the mains

 

[ShaunCorbs]

What’s your mains pressure ?

nothing open ?

one tap open ?