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Forums › Home Workshop DIY › Low Pressure Hot water Cylinder

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#305919 13-Jun-2023 15:57
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Hi Does anyone have any experience of improving the pressure or flow on a Low Pressure HW cylinder. Apparently a pump can be added to the hw pipe but do they work? Same applies to shower heads that boost flow rate. Any comments. 5k to install Mains Pressure to increase will increase my blood pressure.

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Dynamic
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  #3089558 13-Jun-2023 16:09
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Questions:

 

  • is the pressure at the hop tap in the kitchen the same or very similar to the pressure in the shower?  (A difference may indicate the shower has a flow restrictor fitted for 'hot water saving' reasons.)
  • How big an improvement would make a difference?
  • What is the 'working head' of your current cylinder?  This should be on the sticker.
  • What is the height of the header pipe that is likely sticking out of the top of the cylinder and out the roof PLUS the height of the cylinder itself?

In my case the answers are

 

  • it is the same
  • any improvement would be helpful.  It takes 1 minute and 15 seconds for my shower water to get to temperature
  • 7.2m (from memory)
  • approx 6.5m

I wanted to fit a pressure valve to the top of the header pipe to allow me to adjust the ajax vale to give a higher head level and therefore more pressure.  Plumber said I was close to my limit and this was not recommended for a 15 year old cylinder.  I now live in hope that it's going to start leaking some time soon so I can justify a replacement with mains pressure.




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PocketSmith for budgeting and personal finance management.  A great Kiwi company.

MadEngineer
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  #3089583 13-Jun-2023 18:46
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Replace the cylinder.  




You're not on Atlantis anymore, Duncan Idaho.

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