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gravity fed system

Gravity feed is the use of earth's gravity to move something (usually a liquid) from one place to another. It is a simple means of moving a liquid without the use of a pump. A common application is the supply of fuel to an internal combustion engine by placing the fuel tank above the engine, e.g. in motorcycles, lawn mowers, etc. A non-liquid application is the carton flow shelving system.
Ancient Roman aqueducts were gravity-fed, as water supply systems to remote villages in developing countries often are. In this case the flow of water to the village is provided by the hydraulic head, the vertical distance from the intake at the source to the outflow in the village, on which gravity acts; while it is opposed by the friction in the pipe which is determined primarily by the length and diameter of the pipe as well as by its age and the material of which it is made.

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  1. F

    pump advice for a gravity fed system

    Hi all, Please can i have some expert advice. I have a gravity fed system and i've just bought a lovely mira digital low pressure shower system that comes with a pump specifically for gravity fed systems. This pump will just provide pumped water to the shower. As i'm also in the process of...
    • fishhead
    • Thread
    • advice cylinder fed gravity gravity fed system pressure pump separate system thank water
    • Replies: 13
    • Forum: Plumbing Jobs | The Job-board
  2. H

    Gravity Fed System - upgrade to Combi/ High Pressure System

    I currently have a gravity feed system. In the very near future I am adding a loft extension to my property so the 2 cold water tanks in my London roof will have to be removed. I seek a plumbing/engineer to visit my property to give me advice and possible options in upgrading my existing...
    • Homealone
    • Thread
    • combi fed gravity gravity fed system high high pressure london pressure property system upgrade
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  3. M

    No Hot Water - Gravity Fed System

    The system : S plan with the hot water cylinder in the loft and the F&E tank about two feet (max) above the cylinder. The cold feed from the F&E tank and the cylinder flow/return disappear into the eaves of the roof (inaccessible), run down some boxwork in the first floor hall and then...
  4. R

    Gravity fed system.

    Hello I would like some information on a small job I'm doing for my mum. My mother has a gravity fed system with the bathroom and kitchen both on the ground floor where the hot water cylinder is also situated. There is central heating with radiators upstairs and down. There is also the cold...
  5. B

    Poor hot water pressure on gravity fed system

    Hi all. Got a job on and hw is gravity fed. Renewed bathroom but we had to take the hot into the basement and bring it back up into bathroom (couldn't avoid it really) and cylinder is in the attic but since doing so the pressure has worsened so much so that new mixer shower won't work. Would...
    • Bhoydavid
    • Thread
    • fed gravity gravity fed system hot hot water hot water pressure pressure system water water pressure
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  6. M

    Replacing gravity fed system in flat with no gas. Help me please

    Hi, I am renovating my apartment, so new kitchen and bathroom, but have really bad hot water. I am running an electric gravity fed system at the moment as i have no gas, but pressure is terrible as i have a flat roof and tank is in the airing cupboard, only at head height. It is ok for the...
    • Muzzafish
    • Thread
    • fed flat gas gravity gravity fed system help please pressure replacing shower system water
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  7. J

    Pressure problems.. Gravity fed system.

    Hi, I am very inexperienced at plumbing but I am having a real problem with low pressure in my upstairs bathroom. The problem only affects the cold water taps for some reason, the hot water is fine. The problem first appeared about a year ago when we had the bathroom redone, the cold water...
    • Jreucassel
    • Thread
    • fed flush gravity gravity fed system pressure problem problems system water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  8. E

    Gravity fed system with no open vent?

    Hi all, just viewed a proposed boiler install heat only direct swap. The system is gravity fed but has no open vent? So I presume the water expands back into the cistern. Is this common?
  9. M

    trianco oil fired external (with cylinder in attic) gravity fed system

    i am on a job where the radiators down stairs are heating good but the 3 upstairs rads have no heat whatsoever, the boiler is outside at back door of house and is working perfectly,pump sounds great and set at 3, radiators are full of water upstairs yet no heat apart from at one which has tiny...
    • markmonty
    • Thread
    • attic cylinder external fed fired gravity gravity fed system oil other radiators sounds suggestions system trianco upstairs
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  10. J

    gravity fed system queries.

    Hi, I was called to a customers premises today to quote for a replacement boiler and upgrade of system. The customer has a back boiler (baxi bermuda) and i believe it is fed by gravity.I am not familiar with this type of system so i just wanted to check are gravity systems usually one pipe...
  11. P

    Boiler for Gravity fed System?

    Hi guys can you get a boiler that will work on a gravity fed system or are they no longer available? i know most are pump fed systems nowadays but the customers budget it tight, Thanks guys
  12. S

    Gravity fed system wiring fault???

    Afternoon Plumber gurus. Have a rented property which has a gravity fed system in it. Been asked by tenant to sort a few problems with heating. 1. bleed a radiator (give me strength) the other is she cant have hot water without the heating on. (had house a year) I thought this would be a MZV...
    • stanna
    • Thread
    • fault fed gravity gravity fed system heating system water which wiring
    • Replies: 18
    • Forum: Plumbing Jobs | The Job-board
  13. H

    Cold radiators - Baxi back boiler gravity fed system

    Long story ill try to supply all the info: moved into house - evident the heating had never been touched since 5 years ago when a new baxi back oiler was installed, mix ages of rads throughout the house. the system is gravity fed pump working but not sure how to bleed- do i just remove the...
    • hands2bfree
    • Thread
    • back boiler baxi boiler cold color fed gravity gravity fed system oil radiator radiators still system verdana
    • Replies: 30
    • Forum: Plumbing Jobs | The Job-board
  14. A

    Gravity Fed System

    Hi I wonder if you can help/advise. We are currently replacing our old bath with an enclosed shower in a gravity feed system. I'm after a Thermostatic control with 2 outlets (one to a static head and one to a hand held unit) Question is what is the bar preasure of a gravity feed system...
  15. C

    back boiler boiling

    Hi there i have a problem with a new woodburning stove with backboiler. It is on a gravity fed system but it doesnt seem to be working as it should. It will boil and release itself up to the header tank then repeat.There was an air lock in the circuit but i let it off at the hot water cylindar...
    • Coly Loughlin
    • Thread
    • air airlock back boiler backboiler boiler boiling building regs fed flush gravity gravity fed system header header tank hose hot hot water oil pipe plumber problem radiators system tank temperature vent water
    • Replies: 14
    • Forum: Plumbing Jobs | The Job-board
  16. D

    Will new pipework airlock?

    Hi I hope someone can help me out with new central heating pipework I have installed in a new extention - 5 radiators fed by 22mm from existing house stepped down to 15mm for each rad (or two). However, the existing house concrete floor is not level meaning the pipes slope upward to the point...
    • djboyd
    • Thread
    • 22mm airlock bits branch central central heating channel concrete concrete floor diy drain fed gravity gravity fed system heating high hose job pipes pipework radiator radiators system
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  17. D

    Combining Mains and gravity fed system

    Hi all, Is it possible (has anyone tried) to combine a gravity fed system (tank in attic) together with the mains. Basically by passing the tank though putting a non return valve on the outlet of the tank. This I hope will add the pressure of water up to the mains pressure without need...
    • davedemi
    • Thread
    • cold combi cylinder electric fed gravity gravity fed system hot hot water hot water cylinder mains mains water pressure noise pipe power pressure pump pumps system tank valve vent vessel water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  18. O

    gravity fed system. only one tank setup??

    Hi all, went to quote a lady today who wants her old boiler replacing but wants to replace it with a regular boiler not a sealed system or combi, thing is she only has one header tank, I traced the pipework and it only has a feed to the hot water cylinder and a feed to the shower pump. and only...
    • obseen16
    • Thread
    • boiler cistern combi combi boiler cylinder drain fed gravity gravity fed system head header header tank hot hot water hot water cylinder job pump sealed setup shower shower pump system tank unvented vent water
    • Replies: 16
    • Forum: Plumbing Jobs | The Job-board
  19. J

    Unbalanced water for mixer shower

    Hi, Does anyone know if using a pressure reducing valve for an unbalanced system will work. It's for a mixer shower that has been fitted. It's a gravity fed system so the hot comes from the water cyclinder but the problem is - the cold is connected directly to the rising main. This prevents...
    • joni2008
    • Thread
    • advise air bath cistern cold cold water electric fed fitting gravity gravity fed system hot hot water impeller install main mains mixer mixer shower noise pipes pressure problem rising shower system taps temperature valve valves water work
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  20. M

    pipe size question

    On a gravity fed system would it make a lot of difference to the flow pressure to the bath taps if the pipes where reduced from 22 to 15 for the last meter or so? Also is there any way of increasing the pressure to both hot a cold feeds with out the use of a pump as i have a customer who...
    • Matty A
    • Thread
    • bath bath taps boiler cold combi fed flow gravity gravity fed system head hose hot hot water pipe pipe size pipes pressure pump question shower shower head shower pump single size system taps valve water
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
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