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  1. N

    dual fuel towel radiator questions

    Hi I am not a plumber nor experienced diyer and have some questions about ladder dual fuel radiators. The WWW seems to be a bit lacking.. :) 1) I was wondering how you choose your element wattage? Is it based on rad height vs element length or rad wattage vs element wattage? 2) there is...
  2. T

    Some questions about balancing central heating

    Firstly hello this is my first post. The back ground: I recently bought an old house. The heating system was intact but the boiler wasn't working (heat exchanger leaking).The boiler was replaced with a straight replacement Ideal Condensing boiler. At that time there were no radiators on the...
    • Thedeester1
    • Thread
    • central central heating heating questions
    • Replies: 15
    • Forum: Central Heating Forum
  3. M

    Combi advice and general new system questions

    Hi All Advice please! Just had gas mains fitted in an old townhouse so now need to get moving with sourcing rads and a combi boiler so some questions: How do I work out the size of boiler required or is it easier to advise on size by the number of rooms? The house has sitting room, dining...
  4. C

    Several questions about JG Speedfit & Superseal

    I am a DIY person but from a technical background. Some basic questions about JG Speedfit I see reference in other threads to JG to 'push fit'. Looking at a JG video on youtube they show a speedfit fitting where the outer ring is locked after pipe is installed. Q1 Is there only 1 type...
  5. J

    more questions..

    Found some good pictures on this website: Risers and Run-Outs On the 'modular pipework' section the 4 pipes going to fan coil units, two are just flow and return from a heat source like a boiler and are the other 2 from a chiller so in summer they can provide cool air, is that right? Also...
  6. B

    Trainee gas questions in this thread ONLY please

    hey all, I'm just ticking off the boxes in my completed tasks folder for my ACS and for some reason my mind has gone completely blank. Ok, so in all my 12 jobs, i have to carry measure operating pressure on the appliance. correct me if i'm wrong, you cannot carry out operating pressure if...
  7. M

    Few combustion questions ?

    I'm really stuck, searched google and looked throughout the corgi book 1. What level of CO2 in a room could critically affect combustion of a gas-fired asppliance a - 100ppm b - 300ppm c - 1000ppm (My answer) d - 15000ppm 2.CO can migrate in which of the following ways a - upward via a...
  8. J

    Hotel heating questions..

    Have been working in a hotel (27 rooms with ensuites) changing staff toilets and adding a radiator and would like to have more of an understanding of some of the bits in the plant room. The plant room has 4 boilers (potterton osprey 2) with 5 heating zones and the older bigger grundfos pump in...
  9. A

    Couple of Questions for Installers

    I'm repair engineer and I've never really done any full installation work before. I need to put a full central heating system in my dad's house he's buying. Currently there's just a gas meter and electric heaters, so it really is a blank canvass! My dad wants the gas pipe running in the wall...
  10. D

    Soil stack questions

    I'm installing a new soil stack for an ensuite backroom and have a few questions I'd appreciate an answer to. I'll be confirming this is ok with Building control etc but would prefer to have a sensible plan! The soil pipe is designed to run up the side of the house into the underside of a...
    • David1
    • Thread
    • questions soil
    • Replies: 0
    • Forum: Boilers
  11. cr0ft

    Drainage Questions - Advice Needed Please.

    Hi all, After some advice on a drainage job I am starting tomorrow. Done an inspection of the existing drains today and at the mini inspection chamber (300mm) at the head of the drain the top of the underground PVC pipe is 0.2m or so below the surface. We are replacing the old mini inspection...
  12. J

    New CH install - couple of questions - newbie

    Hello - We recently had a recommended Heating engineer install a brand new CH system with a Worcester Bosch Greenstar 1.8i boiler configured as a system boiler and 16 rads, with TRV's and room stat. There are a couple of things he didn't complete to my satisfaction but I appreciate some...
  13. K

    Part L questions

    hey guys. ive posted this up in the arms as not to show the public how clueless some of us are.... i have an office to install a boiler + central heating to it now i know its classed differently to a house hold but i cant make head nor tail of part L in relation to it !! ive just used...
  14. A

    Ordering parts for tomorrows job. got a couple of questions, help appreciated

    Hi guys i'm doing a job tomorrow for a guy who is having his done up before he moves in. The job is run pipes under floor in ensuite for shower, basin, toilet and towel rail. All in plastic/push fit. The floor is mostly up for what i need to do and the walls just have plaster board on so I...
  15. P

    CH Pumps - stupid questions (?)

    Possible stupid newbie question coming up! Q1. I've always wondered... WHY do Central Heating Pumps have such huge couplings on them? I doubt many homes use pipes bigger than 22mm - but the couplings on all the pumps I've ever seen have about 40mm threads. My guess is so you can change the...
  16. J

    Two questions

    X800, how long can you leave it a sealed system ? Can it be used in conjunction with a mangnacleanse when flushing ? am fitting a potterton heatmax, what's the script if you fit a programable salus rs ? Will it void the guarantee ? cheers
  17. J

    outside tap questions

    Hi all, I'm due to fit an outside tap for a customer. First time I've done it. I know all the theory, but have a few puzzlements... 1. I'm planning to sleeve the 15mm pipe, with 22mm copper pipe (or maybe plastic overflow pipe, which is cheaper). What do you recommend I seal the pipes in with...
  18. H

    General questions about Vaillant eco tec 24: energy saving tips,adjusting pressure

    Hi all I want to keep my bills down. Hardly ever use central heating. The installers set my hot water temp to around 53 degrees and the radiator heat to 60. Would it save money if i reduced it from 60 to 50 or even 40? (once i figure out how!) Also, if say the rad heat is set to 60 degrees and...
  19. C

    Multifuel CH pipe questions

    Hi All. New to the forum and would appreciate some help. I’m in Spain, Costa Blanca doing odd jobs etc including afair bit of basic plumbing (new mains water pipes, PRV’s, toilets, gardenirrigation etc.) So not an expert by any means but fairly comfortable with thebasics. At home I have wood...
  20. B

    novembers mandatory questions for gsr,s

    wishing access in this forum how many of you know the answer to question 2? what does tb016 relate to,and how many spillage tests would you carry out on a OF appliance if a extractor fan was fitted in a adjacent kitchen with intercommunicating doors between kitchen and appliance location
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