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  1. siricosm

    Programmable digital cylinder stat

    That could work. Some timers are SPDT, so one could put two controllers like the one you linked downstream of that, one set to day temperature, the other to night. The probes are way smaller than the pocket in the cylinder, so two of them would certainly fit. It is just a shame one can't get...
  2. siricosm

    Programmable digital cylinder stat

    That thread is pretty old, but it is pretty much exactly what I have now, except that the boiler has been updated to Ideal's modern equivalent of the FF360. The controls are all on the diagram, it is just very simple. A mechanical thermostat controls the cylinder temperature, which the boiler...
  3. siricosm

    Programmable digital cylinder stat

    The boiler is a heat only boiler with external pump that heats a thermal store, controlled by a mechanical cylinder stat. I had a thread on it a while back when I was designing it. https://www.plumberstalk.net/threads/please-criticize-my-plan.111888/post-1079627 I am too cheap to heat the hot...
  4. siricosm

    Programmable digital cylinder stat

    This one looks like the right idea, but from the description is does not seem to be able to program different temperatures for day/night. I only need an amp or two, just enough for the switched live to the boiler and the pump. The UFH stats are programmable, but you can't set the differential...
  5. siricosm

    Programmable digital cylinder stat

    I bought one of these: and I am using it to control the temperature of my hot tub, and it works great. Does anyone know of a device like this that does not use plugs but rather can be wired in? I am looking for something to control my cylinder, that can be programmed down at night with the...
  6. siricosm

    Tape for pipe insulation

    I was using generic closed cell foam insulation from Screwfix, the grey stuff with a slit in it 13mm thick. I don't have room in a lot of places for much thicker. All the duct tape I have seen dries out after a few years and falls off, I can't imagine that people can actually use it to seal...
  7. siricosm

    Tape for pipe insulation

    Does anyone have recommendations for tape to seal the seams in foam pipe insulation? Most tape seems to get brittle over time and lose its stickiness and lets go. Also does anyone know of a foam pipe wrap? There are a lot of spots around pipe clamps, valves, pumps, etc. that cannot be covered...
  8. siricosm

    Anyone plumb a DIY hot tub?

    I bought a used acrylic hot tub shell that I plan to sink into the ground in the backyard. The plan is to heat it with a tube/shell exchanger off my thermal store, with a main pump for the jets, and a circulating pump for the filter and heat. anyone know a good place to buy jets, and other hot...
  9. siricosm

    Weather compensation for cylinder?

    Does anyone know of a weather compensation unit that can be fitted to a cylinder? I have an Ideal Logic Max H24 which heats a thermal store. The boiler can take an Ideal weather compensation unit to raise the target flow temperature as the outside temperature drops, but the store temperature...
  10. siricosm

    Boiler replacement in Norwich

    I need someone to replace my boiler, I am thinking to get an Intergas HRE 24 SB. Our current boiler (and old Ideal) is in the kitchen, and we would like to relocate it to the laundry room or loft, so a new gas line needs to be run. I would prefer someone local in Norwich that can also do the...
  11. siricosm

    Is a pool heat exchanger suitable for a communal heating system?

    This means you have over 2 bar of pressure in the lower parts of your unvented system already. So sealing it would not require a dramatic increase in pressure, but perhaps a discussion for a different thread.
  12. siricosm

    Is a pool heat exchanger suitable for a communal heating system?

    I noticed you mentioned a 23m flue, may I ask how tall is the building? Or more importantly, what is the height difference from the lowest pipework in the basement to the top of the highest radiator? 10m is around 1 bar, and you can run a sealed system at that pressure, or maybe a bit above, so...
  13. siricosm

    Is a pool heat exchanger suitable for a communal heating system?

    Indeed, I guess I assumed that when a professional is doing the install, they would automatically go for a sealed system, it did not occur to me that they might want to leave it vented. Along with inhibitor, sealing the system should stop the corrosion that is generating the problem in the first...
  14. siricosm

    Is a pool heat exchanger suitable for a communal heating system?

    Hi John, That is why I was thinking a small buffer tank might work better, as the water would move more slowly, and give more chance for anything large to settle out. Plus you would not want the two returns across from each other like in the picture in your link, but rather staggered something...
  15. siricosm

    Is a pool heat exchanger suitable for a communal heating system?

    Not sure I should comment, because I am just a DIY guy, but wouldn't a small buffer tank, or large vertical LLH work? The return from the rads would come in at the bottom, and the return to the boiler could come off half way up. If the water is not moving too fast, then most of the sludge should...
  16. siricosm

    T50 on new install?

    I think will I have to drop it, because there is a TMV that I have on its max setting, that appears to be around 48C, and I have no way to get upstream of that. I thought about plumbing the laundry sink direct to the hot from the plate exchanger, since sometimes very hot water is useful, but...
  17. siricosm

    T50 on new install?

    I will see if I can measure that. I'll have to find a day/time when I can drop the store temperature without the family noticing.
  18. siricosm

    Towel Rail on boiler circuit

    That is a good point. In this case he wants the towel rail running even when the heat is off, so depending how it is piped (zoned) he might have to put it where the bypass is, or would be. Is that correct?
  19. siricosm

    Towel Rail on boiler circuit

    If you can run pipes back, then for sure I would go that route. It is not worth the hassle to try something that might not work to save a few feet of pipe. A single pipe could work, so long as there is nothing taking off from the pipe between the boiler and the pump, in your case I presume the...
  20. siricosm

    Towel Rail on boiler circuit

    Then it would act to bypass your boiler. The pump would push (or pull) water through the rad instead of through the boiler, and it would reduce your system performance accordingly. You don't want to do anything to reduce the flow through your boiler, and it could even be dangerous if your boiler...

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