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nicholas bonham-carter

nicholas bonham-carter

Joined on November 24, 2007

Last Post on September 2, 2014

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boiler fill

@ March 10, 2009 6:14 PM in where can a diagram of a drop header be seen

one change i would make to that piping arrangement is to put the boiloer fill connection on the wet return, as far away as convienently possible, so as to avoid thermal shock, when filling with cold water.--nbc

cracking the bubble

@ March 10, 2009 6:04 PM in How much should a steam radiator be pitched?

when the level is level, the bubble is in between the lines, and when it is cracking, it is touching one of the lines.--nbc

raising the rad

@ March 10, 2009 1:33 PM in How much should a steam radiator be pitched?

your are only raising the rad enough to slip the washer under the leg. for a rad this size i would think that there are intermediate legs? so you raise it enough to slip washers under the end legs, then enough to put one under each middle leg, then enough to put another washer under each end. put a level on the radiator and see if it "cracks the bubble" [an apt phrase- bob!]. when you lever it up, do so slowly to avoid putting undue strain on the union nut next to the valve.--nbc

insurable event?

@ March 10, 2009 11:32 AM in Pregnant Boiler

i wonder if a minor explosion counts as an insurable event? certainly damage to the structure is covered, but don't know about the boiler-especially if badly maintained--nbc

large rad pitching

@ March 10, 2009 11:09 AM in How much should a steam radiator be pitched?

for large rads you may need larger washwers, to spread the load. be careful when jacking up not to raise up the end legs to much at a time as there could be a leverage factor with stress at the valve spunt nut. put a washer under the end legs, then under the middle legs, and finally enough extra washers under the end to make each leg equally supported by varying numbers of washers. be absolutely certain [with a good level] you need to do this before you start! i am wondering if i would loosen the spud nut slightly before starting, so as not to scrape the mating surfaces.--nbc

important point !

@ March 10, 2009 10:53 AM in Cash Jobs.

and can you even afford that particular type of business in any case? seems to me that the customer will view you as a co-conspirator who is ready to give priority for service calls later.--nbc

radiator pitch

@ March 10, 2009 10:45 AM in How much should a steam radiator be pitched?

someone here had the brilliant idea of puting quarters under the feet of the radiator away from the valve end. i don't know that it is necessary to pitch them so much that they drain dry-the legs could be hollow, and that would require quite a pitch to drain!! most supply and return pipes are pitched 1 in in 10-20 ft. that would work out to aboutone quarter under each end foot, and may not be necessary unless you can hear noise from steam trying to get through a pool of condensate. as long as they are somewhat pitched towards the valve, and silent, you should be alright.--nbc

old boiler

@ March 10, 2009 9:05 AM in National Grid

maybe it's even gravity hot water. if so do a search on here using the search button above for "gravity", and you will see that a skilled pro is still needed. are your fuel bills high? perhaps a switch to a gas burner would be the least you could do, although not as efficient as a new mod-con boiler. there is a current episode on "this old house" i see from here showing what your possible experience could be with this--nbc

delayed ignition

@ March 10, 2009 8:43 AM in Pregnant Boiler

what ever happened to this boiler? did they go with an all-new system, or repair the old one? did you ever find out how such a thing could have happened?--nbc

gas co. install?

@ March 10, 2009 8:35 AM in National Grid

do you have steam or hot water? this is one situation where a sample installation contract would be useful, if not downright necessary, especially if you have steam! keywords in the contract:....manufacturers specifications,....iron pipe,....dry steam,....vaporstat,....gravity return,.....etc.--nbc

cash customers

@ March 9, 2009 9:54 PM in Cash Jobs.

at some point the installers who do a cash only business will have to come clean, when the size of the job makes it impossible to slide under the financial table. there are some people who do business on a barter system-how does the tax work if you do the boiler, and he does your roof?nbc

teeing a rad vent

@ March 9, 2009 6:25 PM in 1/8\" tee for radiators

i could only find brass [1 nipple+ 1 tee] which is better in the long run. i also chased the threads of the rad with a tap so the nipple would go in as far as it could.--nbc

vents on a tee

@ March 9, 2009 12:35 PM in 1/8\" tee for radiators

i've done that with hoffman vents, without problems except a little noise from condensate sitting in the tee. just make sure that your mains are vented as much as possible. the rad air vents can only handle the air in the riser and rad-not the mains! keeping the pressure low [below 1 psi] is also a help.--nbc

is setback saving ?

@ March 9, 2009 12:28 PM in Does a 15 degree thermostat setback put undue strain on heater

here is a thread on the subject, and there are others-just use the search button on the orange banner above, leywords such as setback, or steam thermostat... are you the only occupant in the building, and how have you calculated your fuel savings? one way to save fuel money is to keep the pressure low, clean the burner,and maximise the air venting on the steam pipe returns. you may be wasting less fuel because of your setback, but waste is still waste!--nbc http://forums.invision.net/Thread.cfm?CFApp=2&&Message_ID=433801&_#Message433801

idiot-proof feed valve

@ March 8, 2009 11:05 AM in Aftermath of overfilled boiler

after i did the same thing a couple of times, i put a spring-loaded valve on, such as would be on a camp shower. i think if you change the air vents or clean them, the water should drain out after a couple of cycles, unless the steam valve has dropped its disk. you could check that by removing the bonnet of the valve, and looking at the valve-stem.--nbc

someone's learning HTML!

@ March 8, 2009 10:56 AM in shocking thermostat

good idea, i will get a nice brass plate, and ground it through the unused conductor in the cable, and place it behind the thermostat, so i can touch it before the 'stat. why don't the manufacturers produce more affordable wireless models? running the signal through the house wiring, like the old radio-shack "plug-in" intercom would be an option too! you did a good job of incorporating the J-PEG file in the posting!--nbc

how much time?

@ March 7, 2009 11:18 AM in combustion testing charges

how much time do you allocate for making the combustion test? if it has never been done before on the boiler [a good possibility], then you have to get out the drill and make the hole in the flue,calibrate the analyser to ambient air,put the probe in, fire up the boiler, wait for stabilization, and take the readings. that plus making adjustments, must be at least an hour of time. can the customer compare that with several hours of soot removal every season, plus the increase in wasted fuel? too bad there is an oil glut now, so people don't see the necessity of fuel economy, and flame adjustment!--nbc

static discharge

@ March 7, 2009 9:19 AM in shocking thermostat

of course that's what i do now-just thought there might be some more technical way.--nbc

water trap

@ March 7, 2009 9:08 AM in Steam pipe diameter and insulation question

as a temporary expediant, you could jack up the radiator on all 4 legs, and put equal sized blocks under them. that could raise the pipe and drain it.--nbc

drums 'n pipes PS

@ March 6, 2009 8:41 PM in Drums reverberating through pipes

there is probably a chase through which the riser runs-can this be stuffed with f/glass insulation?--nbc

shocking thermostat

@ March 6, 2009 7:39 PM in shocking thermostat

whenever i make a change to my visionpro thermostat, my static electricity disharges into the 'stat. are there any conventional ways to handle this? i don't want the static discharge to fry the electronics inside it. unfortunately, this location has very staticey carpet.--nbc

drums 'n pipes

@ March 6, 2009 7:11 PM in Drums reverberating through pipes

probably the vibration is first starting in the floor [where the drums are being played]. some part of the floor probably is in solid contact with the riser, which of course carries the vibrations down stairs. if you can find out where the riser is touching-[top and basement], then shave back the contact area, that may lessen the noise carry-through. sound is difficult to control, especially drums! alternatively you could get some styrofoam panels and isolate the drums with a sort of extra floor layer, the vibrations may be kept out of the structure/riser. the final alternative is to get electronic drums!--nbc