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  • FIRST POST
    • zoothornrollo
    • By zoothornrollo 4th Sep 17, 6:09 PM
    • 255Posts
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    zoothornrollo
    Adjustable valves on both sides of radiator?
    • #1
    • 4th Sep 17, 6:09 PM
    Adjustable valves on both sides of radiator? 4th Sep 17 at 6:09 PM
    So why would a plumber put adjustable valves on both ends of the radiator? Does it just mean that we regulate that rad by turning both up / down?
Page 1
    • EssexExile
    • By EssexExile 4th Sep 17, 6:12 PM
    • 2,422 Posts
    • 1,607 Thanks
    EssexExile
    • #2
    • 4th Sep 17, 6:12 PM
    • #2
    • 4th Sep 17, 6:12 PM
    Both valves are always adjustable, just one doesn't usually have a knob on it. The one without the knob is used to balance the system & the one with the knob is used to turn the rad off & on, or is replaced with a thermostatic valve to do it for you.
    Tall, dark & handsome. Well two out of three ain't bad.
    • zoothornrollo
    • By zoothornrollo 4th Sep 17, 6:26 PM
    • 255 Posts
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    zoothornrollo
    • #3
    • 4th Sep 17, 6:26 PM
    • #3
    • 4th Sep 17, 6:26 PM
    Ok well both of these have little handles on to turn them etc but they are not thermostatic. This is why I ask because with both having twisters on we are effectively rebalancing the system if we forget which one is not meant to be moved, and turn them both?
    • EssexExile
    • By EssexExile 4th Sep 17, 6:56 PM
    • 2,422 Posts
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    EssexExile
    • #4
    • 4th Sep 17, 6:56 PM
    • #4
    • 4th Sep 17, 6:56 PM
    In that case ask the plumber which one he used to balance the system* & only use the other one. You could ask him for a plain cap for the other end, he'll have one in his van.

    *If he bothered to balance the system that is.
    Tall, dark & handsome. Well two out of three ain't bad.
    • molerat
    • By molerat 4th Sep 17, 7:11 PM
    • 17,303 Posts
    • 11,498 Thanks
    molerat
    • #5
    • 4th Sep 17, 7:11 PM
    • #5
    • 4th Sep 17, 7:11 PM
    Are you sure they both adjust ? Usually one of the twisters doesn't actually twist anything
    www.helpforheroes.org.uk/donations.html
    • Alex1983
    • By Alex1983 4th Sep 17, 7:23 PM
    • 590 Posts
    • 329 Thanks
    Alex1983
    • #6
    • 4th Sep 17, 7:23 PM
    • #6
    • 4th Sep 17, 7:23 PM
    How many radiators have you got, unless it's big or has circulation issues it won't make much difference.
    • zoothornrollo
    • By zoothornrollo 5th Sep 17, 12:09 PM
    • 255 Posts
    • 29 Thanks
    zoothornrollo
    • #7
    • 5th Sep 17, 12:09 PM
    • #7
    • 5th Sep 17, 12:09 PM
    Thanks all, will take a closer look. It is a new medium-sized vertical rad, 5.5 foot tall and a foot wide, double panel. To be fair these were the valves that we bought along with the rad, so he just fitted what we gave him, but I think I expected one end to be fixed / unturnable.
    Last edited by zoothornrollo; 12-09-2017 at 9:28 AM.
    • Wookey
    • By Wookey 5th Sep 17, 12:19 PM
    • 803 Posts
    • 403 Thanks
    Wookey
    • #8
    • 5th Sep 17, 12:19 PM
    • #8
    • 5th Sep 17, 12:19 PM
    If you want one end to be lockshield just drill out the bit inside that slots onto the rad valve spindle, or just use a black marker to identify the one to be used as the turn of/on so everyone is on the same page with it.
    Norn Iron Club member No 353
    • zoothornrollo
    • By zoothornrollo 12th Sep 17, 9:18 AM
    • 255 Posts
    • 29 Thanks
    zoothornrollo
    • #9
    • 12th Sep 17, 9:18 AM
    • #9
    • 12th Sep 17, 9:18 AM
    If you want one end to be lockshield just drill out the bit inside that slots onto the rad valve spindle, or just use a black marker to identify the one to be used as the turn of/on so everyone is on the same page with it.
    Originally posted by Wookey
    Ok wookey but I'd've thought with all the messing around the system would now be unbalanced in some way? The rads in the loft en suite and our bathroom also also have two adjustable valves.

    As long as all the rads are getting nice and hot in the winter it doesn't really matter I suppose, but we haven't got round to testing that yet...
    Last edited by zoothornrollo; 12-09-2017 at 9:28 AM.
    • Wookey
    • By Wookey 12th Sep 17, 12:03 PM
    • 803 Posts
    • 403 Thanks
    Wookey
    Ok wookey but I'd've thought with all the messing around the system would now be unbalanced in some way? The rads in the loft en suite and our bathroom also also have two adjustable valves.

    As long as all the rads are getting nice and hot in the winter it doesn't really matter I suppose, but we haven't got round to testing that yet...
    Originally posted by zoothornrollo
    Balancing is easy to do should it need it, turn all rads on and run your heat, once it's up to temp check all rads are warm. If the furthest ones away from the boiler are slower to heat up whilst the ones that are closest are hot then using the lockshield valve on the closest rads turn them down until they are off and then crack them back open about 1/2 a turn. As you progress from warmest to coldest each lockshield should be slighly more open than the last, this has the effect of forcing the pump to put hot water round the furthest rad quicker and once you finetune it a bit more the "balance" should start to show and all rads should heat at the same rate.
    Norn Iron Club member No 353
    • zoothornrollo
    • By zoothornrollo 12th Sep 17, 2:39 PM
    • 255 Posts
    • 29 Thanks
    zoothornrollo
    Thanks Wookey - as you obviously know your stuff can I ask another plumbing related question?

    We just extended into the loft earlier this year and the plumber ran all the plumbing up there from the existing plumbing in the kitchen via plastic connectors. He ran them through into our bedroom wall and up into the loft. The pipes are tidily boxed in in the bedroom, but we have noticed a lot of plonking / dripping noises coming from them on the odd occasion when we have run the heating.

    If you turn both rads off up there they eventually stop - but this is obviously not going to be ideal in the next few months if the noises recur every time we want the heating on in the loft...
    • Wookey
    • By Wookey 12th Sep 17, 3:53 PM
    • 803 Posts
    • 403 Thanks
    Wookey
    Was the new pipework done with plastic or copper? Plastic pipes should be fairly quiet whereas copper will produce more sound due to thermal expansion/contraction when it comes into contact with timber, a dripping sound could be mistaken for this expansion depending on what the pipes are rubbing against.

    Is the front of the box easily removed? If so take it of and check the visible pipe run for anywhere it is rubbing against anything and try and ease it or put something between the two things.

    If no noise is occurring with the cover off then it could well be the cover that the pipes are rubbing against, try clipping the pipes back away from the cover in that case.

    If the noises can be heard in the attic then one other possibility is the rad expanding with the heat going thru it, not as common but still can happen and would be more likely in an area with a far lower ambient temp, make sure the rad can move easily on its brackets as its the heating creating some minute expansion in the rad and it reacting to it thru the bracket.
    Norn Iron Club member No 353
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