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accumulator

A hydraulic accumulator is a pressure storage reservoir in which an incompressible hydraulic fluid is held under pressure that is applied by an external source of mechanical energy. The external source can be an engine, a spring, a raised weight, or a compressed gas. An accumulator enables a hydraulic system to cope with extremes of demand using a less powerful pump, to respond more quickly to a temporary demand, and to smooth out pulsations. It is a type of energy storage device.
Compressed gas accumulators, also called hydro-pneumatic accumulators, are by far the most common type.

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  1. J

    Is this an accumulator?

    Hi all, Does anyone know what this is (in a kitchen cupboard, under the kitchen sink)? I'm wondering if it is an accumulator. Mains water pressure is very low in the property. There's a bleed nipple on top, but it seems very small for an accumulator. Thanks for your advice everyone. Jennie
  2. L

    Is an accumulator the way to go?

    I live in a three-story town house with two bathrooms on the top floor and I just put in a combo. The water flow from the mains is good but the pressure is under 1 bar. By the time that the water gets to the third floor, it's terrible. Would an accumulator be the best way to go to improve...
  3. S

    Accumulator or cold water tank+pump

    Hi I own a flat on the third floor of a building. There is an issue with the building water supply due to which there is not enough water pressure and volume reaching our flat. At peak times of the day there is no water coming in the taps. Thames Water will not do anything about it because they...
    • sasha0120
    • Thread
    • accumulator america cold cold water usa water
    • Replies: 39
    • Forum: USA
  4. S

    Accumulator or not?

    HI all ive got a unvented system in the loft at home. We had the water feed replaced and at the stopcock, we get about 2 bar, and 24l/min Showers get about 10L/min and taps around 12l/min - both around 1.5bar. The house seems to have 22mm from the stopcock to the boiler and around the house...
    • stevedurban
    • Thread
    • accumulator acumulator america flow pressure unvented cylinder usa
    • Replies: 2
    • Forum: USA
  5. I

    Pumped Accumulator or DAB Esybox System

    Morning all, I've just bought a 4 bedroom/ 2 bathroom property and wanted some advice on which way to go with the water system. I've redone the drains and in the process replace the incoming mains to 25mm from the external meter. At the moment this supplies 20l/m at around 1.2bar, static...
    • IND_Nick
    • Thread
    • accumulator dab pumped system
    • Replies: 8
    • Forum: Ireland
  6. F

    GWS vs Reliance - Accumulator

    Does anyone have experience of either of these? Reliance – Aquasystem 500 Litre Potable Expansion Vessel XVES050150 £660 GWS Challenger 450L Accumulator Tank (same as Stuart Turner Mainsboost 450SV?) £690 Both are similarly priced. The reliance has a replaceable membrane. The GWS has a 5...
    • fezster
    • Thread
    • accumulator america usa
    • Replies: 1
    • Forum: USA
  7. L

    Unvented Cylinder Query

    I’ve recently moved into a property which currently has a combi boiler, two bathrooms, one power shower and one electric shower. I’m wanting to change this out for an unvented system with two showers operating from the cylinder. Both showers would run at 20 LPM. My current water supply is 15MM...
  8. S

    recommended pressure accumulator for longevity

    Hi, We have good pressure but not so good flow, so considering a pressure accumulator. I live in a hard water area - near Cambridge - if that matters. We'd be replacing a static header tank in the loft. There seem to be a number of brands, like Zilmet, GWS, Grundfos, APS and others. I've...
  9. 999

    Accumulator or expansion Vessal

    Hi All Ive been looking at accumulators online and ended up buying a Reflex potable water expansion vessal. I orginally googled for potable water accumulators and had a load of pages open and purchsed what might be the wrong item. Can someone confirm an expansion vessal is not the same as a...
  10. P

    £5000 for an accumulator tank & pump

    Hi, I'm doing up our old Victorian terrace - 3storeys... water supply has 1.6bar pressure + 24fpm. Not being able to resolve the lack of flow/ pressure to install a bathroom and shower room on 1st & 2nd floors- I got advice and quote from a reputable plumber (we have used 4/5 times before)...
  11. G

    Accumulator expense woes

    Hello to all. I have a very insistent customer who was keen to have an accumulator/pump installed and at the final hurdle done a complete u turn and opted to put a cwsc (ground level!!!) with a Stuart turner negative head single impeller pump to feed a megaflo and cold to the bathrooms. I...
  12. J

    Megaflo Eco vs Eco Plus

    Hi all, We moved into our current home 18-months ago and the following heating/ HW system was already in place: Worcester Bosch 24i system boiler with loft water tank and ancient cylinder (c.100 litre capacity). This looks after 17 rads and two bathrooms. In order to improve water pressure in...
  13. J

    Accumulator or Break-Tank and Booster Pump

    Evening, I have a customer who has 3 showers, 2 baths wanting to upgrade his HWS. Has 200ltr UVHWS cylinder. Incoming mains is 22mm, static pressure 4 bar, dynamic pressure 0.5 bar, flow-rate 13 ltr/min. I'm thinking break-tank and booster set is way foward, someone else recommended him an...
  14. F

    How does an accumulator work?

    Most of the literature on cold water accumulators such as the GAH Coldstream and TWS mains boost show a usable capacity of 50-60%. Is this volume usable in full? Is the initial draw off at the max pressure available (that the accumulator is pre-charged to) and then slowly decreases as the...
  15. S

    Can I install a water softener after an accumulator?

    Hi, Due to my house layout, I'm trying to figure out various options to install a new hot water system. After much back and forth I think I'm going to go with an unvented cylinder with an accumulator to boost the flow. This is because a vented cylinder (which was my first choice) would result...
  16. P

    Two combi and accumulator house advice needed

    I have been trying to get help to replace an old heating system" Mix of electric & oil which leaves us freezing with small tank of hot water every day British gas came round and couldn't quote or help Local plumber no help couldn't quote So looks like a diy job We have 8 bedrooms 3...
  17. Riley

    Accumulator query

    Evening. Apologies if this is an obvious question but do you need to hold G3 to fit accumulators?? i know it's pressurised but not in the same way as say an unvented. Cheers matt
  18. M

    mains accumulator

    guys installed a couple of mains accumulators GWS type, as i had a 15mm mains supply pipework, and i can say i will not be fitting a booster set etc again if a problem with mains flow rate problems occur again great job and zero maintenance
  19. B

    Is this an accumulator?

    Can someone talk me through this please? Im not working on it but would like to understand what its for and its components. Thanks
  20. eagleeye

    Unvented cylinder

    Been to a friends house today to sort a leak on the heating system and while there he told me that there was a leak on an immersion on the cylinder. When I opened up the cupboard what I found I was shocked. He has a Gledhill stainless lite cylinder and next to it a massive expansion vessel. Well...
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