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gravity

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  1. Neville Hillyer

    How can I cure my gravity circulation problem?

    I am a retired Chartered Electrical Engineer and am looking for information about the necessary conditions for gravity primary circulation in a 28mm domestic indirect vented hot water circuit. Until recently I have fitted Hercal cylinders in my house and they always worked without any...
  2. M

    Gravity hot water, pumped heating conversion

    Hi have been asked to fit an unvented cylinder (I’m G3) but the heating system is as follows. ideal Mexico 2 boiler gravity hot water pumped heating 28mm flow and return from boiler to cylinder with 22mm flow and return to boiler with pump for heating. is it possible to put an unvented...
  3. S

    Mira digital shower with gravity fed hot water system.

    Hi, I’ve been to quote for an en-suite for a customer and they like the idea of these digital showers . I’ve not fitted many of these digital showers and when I have it’s only been on unvented systems. Was wondering is the pressure and flow good on the digital showers ? I know you can get...
  4. eagleeye

    Gravity hot water to fully pumped / sealed

    One of our installers currently fitted a new heat only boiler to replace an old floor standing with gravity hot water. At the time he never fitted any valves or cylinder stat etc so I have been called back there to basically start again. Been there today to do it and found that he had the pump...
  5. H

    Converting gravity fed to pumped system

    have an old system, large water tank and small f&e tank on loft, hot water cylinder on first floor, boilder on ground floor (Ideal Mexico Super C 125, vintage 1987, works well though had new stat put in recently). Would really like to just change HWC and leave everything else in place, though...
  6. C

    Advice on converting from Gravity Fed to Fully Pumped.

    OK, time served aerospace engineer here. Here's my query. Mums house has a very old floor standing boiler - HW is gravity fed, CH is pumped. F/E is in the return pipe of the HW loop. I live a long way away, so have to deal with it remotely, otherwise i'd be doing it myself. Boiler has been...
  7. B

    Pumped heating/gravity HW conversion help please

    Hello all can someone help me with this please....? I'm changing an old Potterton Kingfisher 2 with pumped heating and gravity hot water to a new heat only boiler with S plan layout whilst keeping it open vent. It is a big house with the boiler in the basement, cylinder up on second floor and...
  8. S

    Problems with hot water on a gravity fed system.

    Asking for a neighbour. He has an old style gravity fed heating system with tank and immersion heater. He has just changed the pump and three way valve actuator. His heating works but if he selects hot water it turns the heating off. Any suggestions would be appreciated, thank you.
  9. G

    Advice on replacement Towel Rad on Gravity System heated by Multifuel Stove

    Hello, My current installation is an 8Kw Morso Stove, about 20 years old, connected to: An indirect coil in a vented cylinder (on the ground floor where the heater is, but raised by about 80cm), gravity fed with a bathroom towel rail upstairs also gravity fed. Once the gravity circuit is up...
  10. S

    Best Pump for gravity fed shower shower?

    Hi - I have bought a Grohe thermostatic shower to fit to my main bathroom. I have a gravity fed heating system, therefore I'm looking for a pump to give me decent pressure to the shower. I really like it to be powerful, therefore what would you suggest? I have been looking at this...
  11. J

    Gravity hot

    Hi, i have a customer who has been having their part2 float valves in the loft changed every two years. I thought this excessive so did some investigating. Have found that the bath shower mixer is on cold main and gravity hot. When customer put this on thw vent pipe let water into the tank. Has...
  12. R

    gravity flow

    Can gravity flow work in a circular motion ? e.g. 28mm flow rising from stove accross ceiling down through cyl coil and return to stove under floor I know that this system has to be vented properly. I could fully pump as an alternative as the cylinder is about 5 m from boiler. I have plumbed...
  13. M

    Anti gravity loop installation

    Hi all. I hope you are all well. I am hopefully doing my last bathroom of the year as I am totally peed off with em. Well, I still have my 2 at home to do but that will hopefully be fun! I am installing a pump above a cylinder from a non stop flange. What's the best way to do the loop coming...
  14. T

    Woodburner with gravity circuit

    I have been contacted by a customer to change their hot water cylinder. The existing setup is - small open vent copper cylinder, 28mm primaries from woodburner to cylinder. 22mm cold feed and vent pipe. Not pumped, gravity circulation. No heating. Can i use a normal (bigger) cylinder and repipe...
  15. M

    Poor flow on gravity feed bath/shower mixer

    hi, new member here. I have a question for the forum. I have a shower/ mixer in the second bathroom which has always had poor flow. The mixer has a spring loaded mixer and a 40 year old Triton booster pump between the mixer and the shower head. It has become more of a priority as it is for now...
  16. S

    gravity or booster or power shower

    Hi all, For new affordable 2 storey 100m2 3 bedroom semi detached with air to water heat pump and system mixing valve, which should I go with: Option 1: gravity domestic water with pumped shower (mira vigor) Option 2: whole house / stuart turner monsoon - which model Option 3: whole house /...
  17. M

    Gravity Cold Water issue

    Went to a house today with no cold water coming out of the upstairs taps, 3 taps in all. Hot water okay but poor pressure. In addition no cold water is coming out of the shower which is fed by a negative head pump with it's own seperate cold feed. The pump does not kick in even when selected to...
  18. T

    Radiators upstairs in dormer bungalow - Gravity system

    Gravity system. 2 rads and 1 towel rail. Base of F&E tank to top of towel rail approx 300-400mm Base of F&E tank to top of rads approx 800mm All stone cold when heating is on, although the customer tells me that after the heating has been on for about 3 hours they do start to feel warm. I...
  19. T

    Primatic Gravity Hot Water Controls upgrade or new Indirect Cylinder

    My parents have a Baxi Back Boiler with a pumped central heating system and gravity hot water system with a Primatic cylinder. My Mum's asthma is getting more severe due to the house being unheated at night. I am looking for a way for them to be able to have their central heating on low at night...
  20. D

    Gravity and vented thermal store.

    Apologies for the unusual question, as I am an interested DIYer. The question is, why do you need a gravity coil, on a thermal store? Surely, you'd get better flow rate from direct connections to the side, as there would be no friction and you could use 35mm or 42mm copper pipe, to a 2 inch...
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