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delta

A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment. The size and shape of a delta is controlled by the balance between watershed processes that supply sediment, and receiving basin processes that redistribute, sequester, and export that sediment. The size, geometry, and location of the receiving basin also plays an important role in delta evolution. River deltas are important in human civilization, as they are major agricultural production centers and population centers. They can provide coastline defense and can impact drinking water supply. They are also ecologically important, with different species' assemblages depending on their landscape position.

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  1. P

    Boiler / Radiator Total BTU Advice Needed

    Hi all Having some renovations done on ground floor and looking to get rid of / replace some of the older looking boilers on that floor (mainly Double panel, double convector, some double panel single convector. As well as replacing these I wanted to add a couple radiators too, but have become...
  2. F

    Delta O2 "Touch" kitchen faucet question

    6 years old. Never a problem until it sprung a leak recently. Took the solenoid apart, cleaned things up, put it back together and no more leak. So that is not the issue. In fact, there is nothing wrong with it now but I would really like to understand how the darn 'touch' 'off' toggle works. It...
  3. M

    1980 delta shower valve body leak

    Have a leak in one of the three small copper pipes on a 1980 vintage delta shower valve body. Leak is where the copper goes into the brass valve body. What can I use to stop this leak. I do not want to tear the wall out.
  4. M

    Low delta t

    I have installed a system and am only getting a 6degree difference between the flow and return. I have knuckled the locksheilds down on the rads closest the boiler and also lowered the pump speed. To increase it all that can be done is to knuckle the locksheilds down further? Though this is...
  5. M

    Increasing delta t

    How do you increase the delta t on a modern condensing combi boiler? The pump is self modulating. Is it a case of turning lock shields down. Upon fitting am getting a 6 degree flow and return difference on alot of installs. Thanks.
  6. P

    BTU's at delta T65 and T50

    Hi Guys, Need some help. I have calculated online the BTUs for the rads (calculator used T65) then when purchasing I was looking at the T65 radiator calculations..... But I have since noticed, Europe uses T50 as standard. What calculation would I use to convert the T65 BTU needed to the new T50...
  7. townfanjon

    Rad delta T with wc.

    Guys , just curious, how do you work out your rad sizes when using WC , rather than a set DT of say 50
  8. L

    Looking for Gas Safe Engineer / Plumber to Join our New team in NORTH LONDON EN1

    Hi, Im looking for a plumber / Gas safe engineer to join Delta Plumbing Ltd in North London, Enfield. We are looking for a competent engineer with good experience of boiler faults, installations, services etc. Official advert on reed. Salary ranging from £33,000 - £37,500 depending on...
  9. D

    column radiator problem

    Having problems with a designer column radiator that I bought. To cut a story short, it gets hot, all columns are hot to touch, tip, middle and bottom but it doesn't heat the room at all. After about an hour all other rooms are hot but the one with the column rad is cold even though it is hot to...
  10. M

    13,333 btus off 15mm pipe.

    Hi I am putting the pipework in for a heating system and am left with 3 rads to pick up with 13,333 btus of heat needed for this 3 rads. After the last rad on the circuit before these 3. Is around 4 meters, I have ran 22mm from there. I plan on reducing down to 15mm around 300 mm before picking...
  11. M

    Radiator Sizing for 40c Vogue condensing boiler

    Hi there, We had a new combi boiler installed and decided to change the radiators at the same time. I went on to numerous websites calculating the appropriate Btu's and sent these to the plumber who agreed they were correct and stated he would base the radiators on these calculations. We...
  12. S

    Working out Delta T Temperature

    Spent a large chunk of the weekend learning about delta t's in system design. "Delta" being change and "t" being temperature. Example: Flow temp 80 degrees Return temp 70 degrees Room temp 20 degrees Flow+ret/2=75 (mean water temperature) 75- 20 (room temp) =55 Thus your delta t=55 So far...
  13. R

    Condensing bolier flow and return temps - effect on rad sizing?

    Had a quote for complete new CH system including Worcester Greenstar 28i Junior. Not sure I totally understand this, hence asking here: I was pretty surprised at how small the rads spec'd were as I thought condensing boilers needed as low a return temp as possible? The installer (WB...
  14. G

    worcester 24 cdi rf stat

    what wireless room stat would you guys recommend for above boiler?
  15. G

    Delta dore

    Have posted a few times asking about these products and decided that one is going in on my next install....so here it is my first tybox 137 I know there is a 237 but this ticks the box for now. First impressions are it is a very sleek and pleasing to look at. Compared with most other brands...
  16. G

    Delta dore

    Has anyone used this stuff yet? i know gasman mentioned it a few weeks back.following on from all the recent Honeywell problems i think Im Going to try a couple and see how it goes. would be interested to hear from anyone already fitting them. They come with a 5 year warranty so surly they...
  17. S

    I am looking for a VW T5 SWB rhino Delta roof bars

    have you got a set or just one of them for sell roof bars for for vw t5 swb pls let me know ?!
  18. S

    A rad is a rad?

    Hi Folks. Opinions please. Been asked to supply some rads for a customer, prices quoted by my usual plumbing supplier are well above prices from e.g Toolstation. Do all rads of the same spec (size etc) throw out the same amount of heat? Or is it worth spending the extra cash? Thanks in...
  19. S

    Delta 30 or 60 degrees for radiators?

    I would be really interested in opinions on whether it is more efficient to plan a central heating system to run at low or high temperatures. The radiator manufacturer states heat output in W at delta 30 and delta 60 with respect to the average room temperature. The installation is a mild...
  20. G

    Delta G65 with REGAL2 regulator issues

    Have not came across this regulator/meter before and was trying to perform a tightness test but struggled to get the pressure below 23 mbar after several purges ??
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