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Another update: * RP50PT was slow to react and produced unsatisfactory pressure for my fitting (especially 1bar+ rated kitchen faucet). I have connected shower to mains and got RP80SU instead. RP80SU is way more responsive, gives decent initial pressure to kitchen faucet (and pump starts...

Tweaking the pressure vessel was the right direction. After getting somewhat adequate non-leaking car foot pump with manometer I realized the pressure I applied beforehand was way below of what I thought it was. Note the salamander datasheet states 14psi for that model - RP80SU. The pressure...

I'd think that the pressure vessel would hold the high pressure and flow for a bit though... However with 100ml it would not be for more than 1s at 6l/min

Is it possible to tweak the pipe electronics/swap pressure sensor? I'd like to make the pump to set off at 1.5 bar.

I have not resolved the problem entirely but mitigated it somewhat (time for the pump to kick in). I have done some pump/vessel characterization (made sure to depressurise water side before adjusting as advised). The pressure when tap is closed is 2bar. When tap is opened very slightly -...

It looked the vessel was near flat. I pumped it - it was marked 18PSI, - I gave it my best shot... but I only have a leaky pump with approximate gage. It feels definitely more reliable but I still can get it to 'deadlock' state with ten attempts.

The pump is 4m away from cyl - in 22mm in pipework including gravity loop in the loft (the top of the pump is bang on at 600mm below the bottom of the cold water tank).. I'm reading up about the vessel pre-charge...

I have fitted a universal shower pump too boost hot water from gravity system to a fancy kitchen faucet (min pressure 1bar). The pump is RP80SU rated 2.4bar 10m of pipework away from the faucet, cold is mains 3.5bar. I have tried initially positive feed pump, but the flow from the faucet was...

Update, I have eventually went on with a shower pump (RP50PT) that feeds shower (both hot and cold) and feeds kitchen (hot only). It is a bit of love and bit of hate. * Flow at shower went up from 2L/min to 6L/min mixed and pressure is sensible now. Less than expected but you can tell from...

Still have this one. The worst I needed to do with the boiler was to press reset 4 years ago. In the meantime I replaced broken pump and 3 pos valve, got evohome controls. The boiler rock solid.

Correction: I actually was thinking about gledhill torrent: https://www.plumbnation.co.uk/site/gledhill-torrent-stainless-open-vented-cylinders/ with 180L for £1036 (still reasonable) and smaller ones for ~£950.

I have been just looking at https://www.plumbnation.co.uk/site/gledhill-pulsacoil-stainless-thermal-store-cylinders/ And perhaps I misunderstood and the price £945 is for cylinder alone? while I initially thought the price is for cylinder and PHE/pump. ... on the pictures it looks like one...

In other words I want to build something like this, which is £945... for both tank and all the elements and all the work... https://www.gledhill.net/uploads/PulsaCoil-Stainless-Manual-1.pdf

Where have you sourced this cylinder from? Would there be any affordable cylinder for my design with either coil or PHE?

Thanks guys that is really helping a lot to run this through you. I see your points and am getting a bit hesitant myself. The last thing I want is to needing to bath in a kitchen sink in cold water and to flush toilet with a bowl for a week, with some bits and bobs dragging for months. And to...

Just posted drawings above that include the existing setup and planned changes with coil cylinder. No part is vented. 10% F&E sounds reasonable. My current cold water tank occupies middle spot in my loft with best headroom. it is raised on some timbers across trusses to be a bit higher and...

So this is my setup and planned changes in pictures, no part of the system is sealed. I wish I could just go for an integrated combi ideally with small tank... but that could only replace existing boiler in the kitchen where space is at premium.

Not an issue - nice modern mixer faucets with aerators give that soft and light but plentiful water. Looking at your tank - this is not a big tank at all, I wonder how big is mine but hundreds and hundreds of liters for sure. Obviously I can ensure good supply and I really would not need the...

I'll clarify. I'd intend to eventually move all the appliances (taps and shower) to mains pressure. And then the hot water tank would feed nothing (two coils would go through it - that is it), so this would be stagnant water. And the cold water tank`s outstanding function would be left only to...

This is heat exchanger plus pump plus the tmv and thermostats, regulating valves and control unit. New price is 1400euro. Second coil seems like a simple solution i thought problem with those is low rate. My tank is 200L. With the 2nd coil : I could try to get like for like tank with just...