From the United States of America? - Checkout our specific plumbing forum for you:USA Plumbing Forum


  1. S

    Vented Hot Water Cylinder Without Vent Pipe!

    After calling a plumber to look at our leaking power shower he discovered that there is no vent pipe coming off the hot water cylinder . The cylinder is an old indirect vented cylinder heated from the central heating boiler and has a secondary electric immersion heater that is disconnected...
  2. M

    Unvented cylinder in loft with open vented heatinf

    I have a job putting an unvented cylinder in loft, (I’m G3) but they have open vented heating. I’m wondering if this will be possible as flow into cylinder will be higher than f and e tank. Worries about pumping over, any thoughts? Convert heating to close system first?
  3. S

    can un-vented cylinder can be used in a vented set up

    Hi i currently have an very old un insulated vented hot water cylinder that i need replacing. Water in the cylinder is heated indirectly via gas boiler with an immersion as backup. Gravity system in place for hotwater tank feed and Water pressure is ok in the house. I have been offered an...
  4. D

    Do I need a vented cap / end

    Hi guys. Im planning in removing our utility room sink (and worktop) and just having a solid worktop there. Currently, our washing machine and dishwasher are plumbed into the sink waste. If i remove the sink and just have the waste for use with the dishwasher and washing machine, will i need the...
  5. siricosm

    How to reduce corrosion in vented heating systems

    Some vented heating systems seem to sludge up, and yet other remain remain remarkably clean after many years service. Why? Corrosion is caused by oxygen. Eliminating leaks and inhibitor helps, but the F&E tank is open to the air, so oxygen can freely get in there. Is it possible to design a...
  6. S

    Clunk when switching on hot water heating system - non vented system

    Hi, about 5 years ago I had a new boiler fitted. The location of the boiler was moved so new pipes fitted. No problems. About 2 years ago I then needed to have my 3 way valve replaced, this is when issues began. Initially there was no heat and the system was drained several times, this...
  7. siricosm

    Is there a future for vented systems?

    Coming from Canada, and having lived in Europe for some years, I was a bit surprised that people still install vented heating systems in the UK. As a kid I lived in a 1912 house with original cast iron boiler and radiators, and I remember the expansion tank with sight glass, it was in my room...
  8. B

    Vortex Circulators in open vented system

    Has anybody experience with installing a vortex type central heating circulator? Because of back pressure on stopping the motor on a Grundfos, I'm looking at this alternative design which doesn't seem to interfere with the free flow of water. However, I can only find a German manufacturer...
  9. B

    URGENT water level changes significantly in expansion pipe (open vented system)

    I have made some adaptations to the layout of an existing open vented one pipe system. The pump is now some 6 or 7 metres away from the boiler. The cold feed is on the negative side of the pump as is the expansion pipe. The order of fixing is expansion pipe - cold feed - pump. When the pump...
  10. D

    Air lock in open vented system

    Replaced pump on open vented system. Potterton boiler downstairs. Boiler work okay, while heating or hot water demands on as soon the demand is not there boiler will go in to lock out. When pump over run is on burner is off the boiler is bring more heat into the boiler or the air lock. It's...
  11. Jimbob1973

    Replacing radiator and valves on open vented system.

    Hi, I have a hot water tank, 3 header tanks in the loft and so I am assuming I am on an open vented system. I wish to replace a bathroom radiator with a wider one so will need to extend the existing pipework. I also want to tile around the pipework by drilling the tiles (for a neat finish) and...
  12. S

    VENTED central heating system - water circulating through header tank

    Two years ago, I requested a fully qualified plumber to change the location of the hot water cylinder in a vented central heating system. I wanted to move it from the first floor to the loft, which he did. During the last two years, I have often noticed when I have been up in the loft that the...
  13. tonyt

    Vented system - Expansion / fill pipe or pipes?

    Hi, I'm coming to the brainy forum for a proper answer! Scene - vented system, was originally gravity with Aga, then oil boiler with integral pump, then new oil boiler last year with fully pumped "Y" system. I have problems with air in radiators. I find there is a single 22mm expansion/fill...
  14. M

    Horizontal Vented Hot Water Cylinder

    Is a horizontal cylinder (indirect) as efficient as a standard vertical cylinder? No choice but to use use a horizontal but just asking the question to those who have experience .
  15. P

    Heating system ? Vented? Unvented?

    Hi, I had my heating upgraded a few years back by my housing association. I had electric heaters before now I have hot water radiators. I still have a tank in the loft and a hot water tank in the cupboard. Cold water comes from the tank in the loft. Hot water also has low pressure too...
  16. T

    Vented system to Combi

    Hi, So I can get my head around the work involved in this. currently have vented system with boiler in kitchen. Moving to Combi, staying in kitchen. has 22mm gas suuply and condense pipe can go straight out the wall. Hot & cold already in cupboard. in the airing cupbaord what needs to be done...
  17. B

    Vented Cylinder Recommendations

    Hi All, Wanted to get some thoughts on vented cylinder recommendations, I saw a thread on unvented recommendations and not sure it was very conclusive. I've been doing a fair bit of research and cant work out the best route, I started looking at RM Cylinders as that's the one I'm replacing but...
  18. 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...
  19. B

    Short cycling Bosch Worcester 30CDi Greenstar - Bypass Valve?

    My first post, so apologies for any incorrect terminology I had a Bosch Worcester 30CDi Greenstar Classic Regular Boiler installed in 2014. The Boiler is used in a vented S-plan system, with two motorised valves, a manual Bypass Valve, a British Gas (Grundfos) Multi-head pump, Hot Water...
  20. G

    Why are Cylinders rarely in the loft for Trad. Gravity Vented Systems?

    Sorry if I come at this form the wrong direction. I'd like to move my vented-cylinder into the loft. I run two shower-pumps too. I realise a sealed-cylinder is the easy route. Sadly I've not got much mains pressure. Combination boilers don't really have the grunt for fire-hose showers. I'm...