Difference between revisions of "Fitting TRVs to Microbore"
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| − | This article is about fitting [[Thermostatic Radiator Valves]] to [[microbore]] pipe used in [[Central Heating]] systems. It is equally applicable to fitting manual valves and lockshield valves when reworking or extending an existing microbore system. | + | [http://todkonda.ifrance.com/content/forni-micro/ forni micro onde] [http://mamerium.125mb.com/isola-di.htm isola di ventotene] [http://bakedsmurf.ifrance.com/description/sexs-coppie/ sexs coppie it] [http://kamedcal.125mb.com/konkwista.htm konkwista 88] [http://kuzelka111.ifrance.com/lib/my-immortality/ my immortality] [http://earthlygnome.ifrance.com/de-maria/ de maria c srl] [http://dragonzgrace.ifrance.com/description/cordless-presenter/ cordless presenter] [http://madavidan.125mb.com/text/riflessi-anni.htm riflessi anni 50 su economia aziendale] [http://dragonzgrace.ifrance.com/description/misure-cover/ misure cover dvd] [http://mike12305.ifrance.com/lib/gioco-anno/ gioco anno 80] [http://superspounge.ifrance.com/massaggio-verona/ massaggio verona] [http://superspounge.ifrance.com/lg-/ lg 500 batteria lg batterie] 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[http://vanopo.ifrance.com/library/stufe-a/ stufe a gas] [http://prkinardan.125mb.com/styles/dsc-h.htm dsc h1 sony] [http://mcgoley.125mb.com/articles/previsioni-del.htm previsioni del tempo in andalusia] [http://stbrocke.125mb.com/content/dragostea-din.htm dragostea din tie italiano] [http://prkinardan.125mb.com/styles/parigi-pensioni.htm parigi pensioni] [http://stbrocke.125mb.com/content/sottoveste-che.htm sottoveste che passione] [http://vanopo.ifrance.com/library/prom-at/ prom at the palace the queens concert buckingham palace 2002] [http://kuzelka111.ifrance.com/lib/lettori-mp/ lettori mp3 con hard disk] [http://mcgoley.125mb.com/articles/giochi-interattivi.htm giochi interattivi] [http://mamerium.125mb.com/nokia-.htm nokia 6600 memoria mmc] [http://bemedad.125mb.com/blog/di-silvester.htm di silvester stallone] [http://prkinardan.125mb.com/styles/www-giannanannini.htm www giannanannini com] [http://kuzelka111.ifrance.com/lib/dj-gabryponte/ dj gabryponte] This article is about fitting [[Thermostatic Radiator Valves]] to [[microbore]] pipe used in [[Central Heating]] systems. It is equally applicable to fitting manual valves and lockshield valves when reworking or extending an existing microbore system. |
The approach described here uses a standard 15mm valve and a soldered 15mm*8mm or 15mm*10mm fitting reducer (e.g. [http://www.bes.ltd.uk BES] 6786 or 6787) to connect to the microbore. This avoids the difficulties that are likely to occur trying to fit a new 8mm or 10mm valve to existing pipework: because microbore copper is very soft the pipe is often found to be distorted when the old valve's olive is removed making it very difficult to get a good seal to the new valve. Even if the pipe is not distorted it is very easy to over-tighten microbore compression joints resulting in leaks. Because this method uses soldered joints the heating system must be drained down to below the level of the valves being replaced. | The approach described here uses a standard 15mm valve and a soldered 15mm*8mm or 15mm*10mm fitting reducer (e.g. [http://www.bes.ltd.uk BES] 6786 or 6787) to connect to the microbore. This avoids the difficulties that are likely to occur trying to fit a new 8mm or 10mm valve to existing pipework: because microbore copper is very soft the pipe is often found to be distorted when the old valve's olive is removed making it very difficult to get a good seal to the new valve. Even if the pipe is not distorted it is very easy to over-tighten microbore compression joints resulting in leaks. Because this method uses soldered joints the heating system must be drained down to below the level of the valves being replaced. | ||
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| [[image:TRV_microbore_08.jpg|center]] | | [[image:TRV_microbore_08.jpg|center]] | ||
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Revision as of 22:58, 4 September 2007
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The approach described here uses a standard 15mm valve and a soldered 15mm*8mm or 15mm*10mm fitting reducer (e.g. BES 6786 or 6787) to connect to the microbore. This avoids the difficulties that are likely to occur trying to fit a new 8mm or 10mm valve to existing pipework: because microbore copper is very soft the pipe is often found to be distorted when the old valve's olive is removed making it very difficult to get a good seal to the new valve. Even if the pipe is not distorted it is very easy to over-tighten microbore compression joints resulting in leaks. Because this method uses soldered joints the heating system must be drained down to below the level of the valves being replaced.
TIP: If planning to replace several valves on an existing system check the diameter of pipe on all valves to be changed: often systems have a mixture of 8mm and 10mm pipework.
 Insert a fitting reducer into the valve so that the olive sits in the middle of the reducer (see pictures of the soldered-up connector, below) and tighten so that the olive grips the reducer. |
 Line up the TRV body with the existing valve body and mark the microbore for cutting to fit into the reducer. |
 Cut the microbore where marked: in this instance a junior hacksaw is used as there isn't space to use a wheel-type cutter |
 |
 |
| Unscrew the old valve body and tail from the radiator (this saves undoing the valve from the tail and then using an L-shaped hex key to unscrew the tail). | |
 |
 |
 |
| Clean out the tapping in the radiator. A wet | ||