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secondary

A secondary chord is an analytical label for a specific harmonic device that is prevalent in the tonal idiom of Western music beginning in the common practice period: the use of diatonic functions for tonicization.
Secondary chords are a type of altered or borrowed chord, chords that are not part of the music piece's key. They are the most common sort of altered chord in tonal music. Secondary chords are referred to by the function they have and the key or chord in which they function. Conventionally, they are written with the notation "function/key". Thus, the most common secondary chord, the dominant of the dominant, is written "V/V" and read as "five of five" or "the dominant of the dominant". The major or minor triad on any diatonic scale degree may have any secondary function applied to it; secondary functions may even be applied to diminished triads in some special circumstances.
Secondary chords were not used until the Baroque period and are found more frequently and freely in the Classical period, even more so in the Romantic period. Composers began to use them less frequently with the breakdown of conventional harmony in modern classical music—but secondary dominants are a cornerstone of popular music and jazz in the 20th century.

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  1. H

    Requirement Circulation pump for the hot water secondary Return

    Silly question (and might already been asked 100rds of time) - I am specifying a circulation pump for the hot water secondary (circulation) return to reduce the wait for hot water. HW is coming from unvented cylinder with a secondary return connection. The secondary return is almost straight...
  2. B

    Secondary return cools cylinder within 2 hours

    I'm a plumbing novice so first of all I apologise if I'm not explaining this situation correctly. I've recently renovated a house for my family to live in and we're having an issue with water not staying hot when the secondary return circuit is on. From a starting point of fully heated the...
  3. J

    Secondary return issur

    Hi When secondary return pump is on theres no flow to hotwater taps but when the pump is not running water flows through tap. Any one come across this before??
  4. J

    Secondary return problem

    Need advice on secondary return issue. When secondary return pump is running no hot water flows from hot taps.when pump off the taps work. Anyone come across this before?? Appreciate any reply
  5. R

    Just come across a job where both primary and secondary

    Hi just come across an installation low pressure and primary and secondary meter both have regulators installed. Pretty sure it's not allowed unless it's a two stage system but this is low pressure. I've explained that the primary meter must be regulated but after that the secondary should not...
  6. D

    Secondary Return Advice

    I'm running a secondary return hot water system and I'd appreciate your advice please. I'm working on a long house where the furthest draw off point Is around 40m away from the unvented cylinder. There are 3 bathrooms 2 kitchens a boot room and a utility. I have installed a 28mm hot supply...
    • Daniel 12233444
    • Thread
    • advice america return secondary usa
    • Replies: 7
    • Forum: USA
  7. O

    connecting ejector (pressurized) to secondary / gravity main line

    question about connecting an ejector pump to the sewer, where there is no existing conditioned structure that gravity-feeds: We have a lot that will be built in a couple years. Lot is sloped, with road and sewer main nearest to the up-hill lot line. The house will built in that corner, and...
    • ohnoflood
    • Thread
    • america connecting ejector gravity main secondary sewer usa
    • Replies: 21
    • Forum: USA
  8. J

    Secondary return

    Hi Just wondering can anyone tell me why a secondary return can not be plumbed with plastic pipe like pex or pb
    • Johnyc86
    • Thread
    • america return secondary usa
    • Replies: 26
    • Forum: USA
  9. M

    Secondary return hot water

    Is secondary return hot water a form of legionella control?
    • Matt0029
    • Thread
    • america hot hot water return secondary usa water
    • Replies: 11
    • Forum: USA
  10. S

    DHW Secondary Circulation Control Strategy

    Hi Everyone, thought I'd pick your brains on some ideas I have for controlling a DHW secondary circulation pump circuit that I'll be installing as part of a new build. The DHW supply will consist of an Air-Water Heat Pump source linked to an unvented cylinder (at mains pressure). Never had the...
    • sleedham
    • Thread
    • america circulation control dhw secondary usa
    • Replies: 13
    • Forum: USA
  11. L

    Can I add an overflow (i.e. secondary) rainwater drain in an internal lightwell that feeds into a bathroom's soil pipe?

    I would appreciate some advice. I have a flat on the 3rd floor of a converted house, which has a lightwell in the middle of the flat. The bottom of the lightwell reaches the 3rd floor (my flat’s floor level) and has a roof lantern for the flat on the 2nd floor. I plan to build a small bathroom...
    • LordWest
    • Thread
    • america drain feeds internal overflow pipe rainwater secondary soil soil pipe usa
    • Replies: 9
    • Forum: USA
  12. H

    Secondary non-return valve

    Worcester Bosch Greenstar 30 CDi Classic System ErP, Underfloor heating and DHWSystem. I have non return valve in the secondary return before the pump (DAB 65/150-3) which constantly rattles when the pump is running. Its been tried in both the horizontal and vertical modes with no effect. The...
    • Haytons7
    • Thread
    • america secondary usa valve
    • Replies: 5
    • Forum: USA
  13. B

    Secondary return pump replacement

    Hi. Limited DIYer who can replace a tap but when it comes to actual real plumbing and pipework, useless. I have a failed secondary return pump in our unvented system. The failed pump is a Lowara EBV 15-1/65U with a mechanical timer. If possible, I would like to just replace the unit with a new...
  14. D

    positioning of secondary circulation pump

    Very last rad on heating circuit is a vertical mounted iguana circo rad, which is 1.8m high. The rad is not getting sufficient water flow even after balancing all other rads. Placement of a secondary circulation pump will alleviate this issue but the question is where best to locate it. Near the...
    • Dr Doolittle
    • Thread
    • circulation circulation pump pump secondary
    • Replies: 11
    • Forum: Ireland
  15. M

    Want to install secondary hot return - need advice please

    Hello everyone! I'm finally getting to do my own bathroom renovation (spend most of my time doing everyone else's). The bathroom is on the ground floor and the hot water cylinder is at the other side of the house on the first floor. The house isn't huge but I'm sick of running the hot tap and...
    • minmax89
    • Thread
    • advice america hot install need advice please return secondary usa
    • Replies: 7
    • Forum: USA
  16. D

    hot water secondary return check valves

    I,m about to change from plastic fitting to copper and want to add a check valve into my secondary hot water return line what prevents the hot water sucking the water out of the secondary return line the plumber that fitted it is no longer here so I cant ask why a check valve wasnt installed...
  17. w7r

    Bathroom plumbing advice - secondary hot circuit

    Afternoon all. After a bit of advice/guidance. I'm currently refurbing my 1st-floor bathroom and the ancient plumbing system in the house whilst I'm at it. It'll have a shower, toilet, basin and a standard size bath. I'm planning a secondary circuit (in copper) for hot water (22mm in and a...
    • w7r
    • Thread
    • advice america bathroom circuit hot plumbing secondary usa
    • Replies: 2
    • Forum: USA
  18. M

    Secondary hot water T

    Hi Lads. I'm working on a large house and we need to tap into the secondary hot water pipe to extend it to the new part of the house. Silly question but I have never had to T in more than once and was checking this would be okay to do.
    • Mark Woodcock
    • Thread
    • america hot hot water secondary usa water
    • Replies: 4
    • Forum: USA
  19. R

    Secondary Return Pump control

    Hi I’ve just installed a secondary hws circulator and wondered on a sensible control strategy. Pump comes on when cylinder is heating up, but when cylinder is off on the timer the pump will Need to run To deliver hot water to the outlets. I was thinking along the lines of a separate 7 day multi...
    • Robocad
    • Thread
    • america control pump return secondary usa
    • Replies: 2
    • Forum: USA
  20. J

    DHW Secondary return configuration.

    Hi Anyone help and advise on the best option for a DHW secondary circulation (SC) layout. Scenario 1 I need to install SC in a large new build. The unvented cylinder will be in the middle of the house and so I would like to have two SC ‘loops’ i.e. T off the hot from the cylinder and go to...
    • Jonnyjambo
    • Thread
    • america dhw return secondary usa
    • Replies: 3
    • Forum: USA
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