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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. siricosm

    Would you replace an old Ideal FF360?

    I have an old FF360 I was thinking about replacing, but in the end it just does not seem economical. It is rated at 78% efficient, so I suppose a new boiler might be able to shave 10-15% off the gas bill, but would that realistically pay for itself? It looks like parts for the Ideal are still...
  7. siricosm

    Dew point of gas-hydrogen blends

    With all this talk about potentially switching from gas to hydrogen or even blending some hydrogen into the gas, does anyone know how this affects the dew point of the products of combustion? With natural gas I think it starts to condense around 57C or so, so the return temperature needs to be...
  8. siricosm

    Running a combi without hot water.

    It seems combi boilers are now cheaper than regular or system boilers, in some cases by quite a bit. I suppose they make a lot more of them and it is just economics of scale. Is it possible to install a combi and just leave the hot water disconnected, and/or turn it off? I am pretty sure you...
  9. siricosm

    T50 on new install?

    I am about to replace my radiators (and piping) and doing the heat loss calculations. I am wondering if the T50 rating on radiators is still reasonable. Wouldn't T40 be more efficient with today's boilers, or would the difference be hardly noticeably? I guess T40 would also be at the upper...
  10. siricosm

    Programmable TRVs for cast iron radiators

    Does anyone know of programmable TRVs that would not look out of place on period cast iron radiators? Even finding regular TRVs is tricky, all the ones that "look good" seem to be very expensive and very good quality.
  11. siricosm

    Where to get connectors for plate exchanger

    Anyone know where to get connectors to fit a plate exchanger? It looks to be 3/4 BSPP. Not even sure what the couplers are called, but I imagine something like those that are on water meters (or pumps), with flat rubber gaskets so that the exchanger can be easily removed.
  12. siricosm

    Leveling a cylinder

    I am installing a 300 liter stainless cylinder, and it is not quite level. The floor is level, but there is a very small tilt on the casing at the bottom, maybe 1/4 inch, but enough to make it look dodgy against the plumb wall. The cylinder does not have metal feet or anything, it appears to...
  13. siricosm

    How to connect to this fitting?

    Here is a pic of a fitting on a duplex stainless buffer cylinder. The thread looks to be 1" BSPP. Any idea of the best way to connect to this? Is there some kind of gasket/o-ring/olive meant for these? or is it best to use a tapered fitting with pipe with dope and hemp?
  14. siricosm

    Fittings for stainless cylinder

    I am installing a stainless cylinder to be used as a central heating buffer that looks to have 1" female tapered fittings. I was going to thread in brass fittings, but was thinking about galvanic corrosion since dissimilar metals are involved. The water will have inhibitor. The tank is duplex...
  15. siricosm

    Is G3/notification required for a CH buffer?

    Is G3 or any other building regs notification required to install a buffer tank on a central heating system?
  16. siricosm

    Is copper pipe all the same?

    I am about to replace the microbore heating system in my house, and need to buy all the copper pipe and fittings. In Canada, copper pipe came in different grades, and if you wanted top quality you could buy the thicker "L" type pipe, rather than the thinner "M" that is mostly used. Here in the...
  17. siricosm

    Please criticize my plan

    I am new to the UK and just bought a house in Norwich. It has a vented cylinder and vented CH that is suffering from pretty severe corrosion, some of the rads are rusted through, so I would like to replace it with a sealed system. The rads are all plumbed in 10mm, so I would like to replace that...
  18. siricosm

    Is a flow switch really necessary?

    I am contemplating installing a heat bank type thermal store, with an external plate exchanger for DHW. The pump on the primary (tank) side of the plate exchanger is usually controlled by a flow switch on the DHW side. I am thinking to use a modulating pump (Grunfos apha2) and a thermal...
  19. 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...
  20. 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...

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