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Directional drilling (or slant drilling) is the practice of drilling non-vertical bores. It can be broken down into four main groups: oilfield directional drilling, utility installation directional drilling (horizontal directional drilling), directional boring, and surface in seam (SIS), which horizontally intersects a vertical bore target to extract coal bed methane.

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  1. S

    Positon of thermostat on the radiatot

    Hi does it matter if the thermostat is not on the inlet pipe but on the outlet pipe going to the next radiator because this is what I have in my house.
  2. D

    Here's another daft question for your amusement

    I know this is basic knowledge but my trvs are confusing me Started searching as I didn't want to appear to be an idiot but this seems to be impossible :) Found this on the Drayton faq What range of TRV bodies are Bi- directional? The 15, 10 or 8mm angled body is bi directional as denoted by...
  3. C

    TRVs

    Do TRVs go on the flow or the return? Which side of the rad is the flow and which is the return?
  4. hammers4spanner

    bi-directional trv

    Bbeen browsing through threads on here and noticed one about how bi directional TRV'S should still be ideally situated on the flow side of pipe. i was under assumption they worked fine on either side so wonderd if anyopne has had issues in the past with these valves as in my experience from...
  5. C

    Noisy TRV

    I have a noisy TRV on one rad only which is the only TRV to be changed in the bungalow. New combi fitted to old 2 pipe system. Most of the TRVs are fitted to the returns as they were when first installed, the kitchen is the only rad to have the TRV fitted to the flow. The noise is coming from a...
  6. D

    Newbie questions about fitting TRVs and flow direction

    My gas burner central heating system is about 40 years old. Piping is gun barrel. I am thinking of fitting TRVs to several of the rads. Before I hire an expert to do the job I have a few questions please: (words like 'draining' and 'airlocks' suggest it is not a DIY job!!!) Forums tell me...
    • dalty
    • Thread
    • about danfoss direction directional fitting flow newbie questions these trvs
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  7. P

    Banging trv,s

    Fit a new system last week with boss trvs on all but one rad, but the heads bang. Have fitted 2 lock shields to towel rail in bathroom,, any ideas .?
  8. B

    TRV4 fitting

    Can someone settle an argument for me about the fitting of the TRV4 radiator valves? that is can they be fitted to both the flow or return sides of the radiator without having any adverse effect on performance? Thanks in advance, theres beer resting on the reply :crazy:
  9. R

    Hot and Cold Directional Valve, is there such a thing

    Hi folks, this may seem a strange enqiry, I am looking at how I can re-direct hot and cold water ie when running cold water it goes in one direction if it gets hot it goe in another. is there such a thing out there ? Any info would be appreciated. In anticipation, Thanks
  10. R

    Hydro phonic (noisy) rads with bi directional TRV’s

    Just had a new Potterton combi boiler installed and had the existing radiators single flow TRV’s replaced with bi directional TRV’s (one rad left without a TRV as per norm). When the heating reaches a specific setting one of the rads emits a vibrating hydro phonic noise which can be stopped by...
    • RobertC
    • Thread
    • boiler brass central heating system cold radiator combi combi boiler directional expansion fix flow hot rads lockshield noise noisy pipe plumber potterton problem radiator radiators single vertical water
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
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