• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.

From the United States of America? - Checkout our specific plumbing forum for you:USA Plumbing Forum

ufh

  1. J

    Wiring for ufh zone Worcester greenstar heatslave 18 25

    Hi, first im gas safe registered so know a bit about wiring but my own boiler is giving me a head ache. Worcester greenstar heatslave 18 25 oil i fitted a nest just linked ch from boiler demand to programmer demand all good. I now want to wire in another stat for my ufh but dont know what to use...
  2. J

    Temporary gas water heater for ufh

    First post. Limited experience of plumbjng design but adequate soldering skills and am not too shoddy at tightening threaded connections... What do you think about using a cheap instant water heater (300 quid variety) to heat a buffer tank for underfloor heating. Gas bottles as no town gas...
  3. F

    Large UFH with electric boiler

    Have a large ufh job to do 250m2 with low profile boards, 12mm pipe, 150mm spacing. Customer does not want gas in the house so wants an electric boiler. Unvented cylinder will be direct so boiler will only be running ufh. 2 manifolds to be installed 3 phase will be installed, but this means...
  4. R

    UFH is it worthwhile ?

    Hi , thanks in advance for taking the time to read my post. I’m currently about to start renovating my kitchen / dining room, I am looking at the idea of putting 1 zone UFH in .The construction is a suspended timber floor on dwarf walls. I was looking at the metal spreader plate with the...
  5. C

    No flow through UFH?

    Hi Guys, see attached pics. Can anyone help with the following issue; I had UFH system installed last year for my kitchen extension, the system was working ok when the plumber finished but as it was completed in the summer months the system was left off until required during the winter months...
  6. B

    Biocide for underfloor heating?

    How essential is biocide in UFH? I have brown dirt in nearly all flow-meters and heard different views on how effective biocide (such as X700) may be. Some say brown colour is from iron particles (magnaclean is fitted) other say its from bacteria living in the pipes? On a close topic: Is it ever...
  7. B

    No Hot Water When UFH Controller is On?

    Hi, My CH system is made up of 3 or 4 radio controllers. Each controller is responsible for a manifold & pump with attached number of UFH zones and radio operated room thermostats. I just found out that the flow pipe into the hot water tank (megaflo) starts to cool down rapidly when one of the...
  8. B

    S plan - pump config causing problems for UFH

    Hi everyone Other posts on secondary circulating pumps have been partially useful but grateful for any guidance on the following: S-plan system, UFH, upstairs rads and HW in 4 story town house. 8 rads and 4 towel rails. Worcester Bosch Greenstar 30CDi system boiler. In order: boiler in...
  9. eagleeye

    Which UFH wiring centre is this

    Just put a new boiler in a property that only has UFH and old boiler switch live came from the UFH wiring Centre which is 230 volt. Problem is now that the new boiler sw/l is only low voltage so cant use the same cable. I'm trying to find out what make of unit this is so I can get some info on...
  10. M

    Thermostat on pipe to turn on ufh

    Can I use a pipe stat to switch on UFH Pump when it detects heat in system. The UFH is piped as an extra rad so when pipe gets hot ie house system is on And starts the pump . At present connected to a programmable stat which operates a single port valve and pump. I’ve put the valve in straight...
  11. V

    Need diagram for combining wood burner,hw storage tank, ufh

    Hello everyone, I'm new to this forum, and I need advice, and a good schematic for combining a lot of components, so they will work the best. So here are the main components: 30kw wood burner 1000 litres hot water storage tank 200 litres DHW storage tank with 2 serpentines (one will be used for...
  12. D

    URGENT Low loss header connection Inc pump to unvented system

    I am fitting my first low loss header onto an unvented system including ufh and 300ltr tank. I have picked the job up after the ufh has been layer, tested and screened over. All I have to work with is the manifold with flow and return pipes and pre installed rad circuit all of which feed into...
  13. Ryooo

    UFH Quotation pricing and info

    Hi guys, I'm pricing my first UFH job. It's a new extension. UFH zones in kitchen, utility and bathroom. I will be fitting a new boiler which will supply heat to the existing radiators and UFH. Having had no experience in UFH just wondering where the best place to start is. Would a manufacturer...
  14. I

    Adding UFH as supplementary heating

    I have a gas boiler for DHW and single zone heating (S-plan with TRVs on all radiators). Now I'm retired and my circulation isn't as good as it once was, I have problems in the colder months with cold feet - particularly on tiled or engineered wood panel flooring on the ground floor. I have...
  15. M

    Radiators and UFH not functioning well

    Hi All. First post. What a great bunch of people here. I have recently had an extension done and we have UFH on just the new extension, and radiators upstairs etc, in the house we have a nest thermostat and a heatmiser stat for the UFH area. The issue I am having right now is that the nest is...
  16. T

    UFH Pipe - Which manufacturer is best - Rehau, Uponor, JG, Polypipe???

    Hi, I'm installing a large 8 zone UFH system into a new concrete floor we're installing at a bungalow. I'm looking at the pipework manufacturers and i can't decide which to go for: I want to install the best under the screed: I'm currently looking at for Pipes: Uponor Rahau Polypipe John...
  17. I

    UFH Air removal - Beginner's Questions

    Hi all. If I may, I'd like to ask some beginner's questions. The situation: We think we may have air trapped in our UFH system. Therefore, we're considering refilling the circuits. However, there are a few details we need to clear up first. First of all, we need (?) to buy some hose end...
  18. H

    UFH Leaks 1 year after installation

    Hi - I little insight and guidance would be much appreciated. My wet UFH was installed over a year ago by a qualified heating engineer, he went through all stages and did the pressure test as well, everything has been working nicely without any issues. Now here is the unlucky coincidence - I had...
  19. C

    Pressure in heating system keeps creeping up

    We have a 2 year old Valiant EcoTec 832 Combi boiler which was running our CH and hot water. We recently had some UFH installed and the boiler moved to our new extension. Over the past weeks the pressure in the heating system keeps creeping up. It goes from approx 1.5 to 3.2 bar overnight. If...
  20. C

    Wiring UFH and Radiators

    Boiler: Valiant Ecotec 832 UHF (new): 2 zone mixing manifold, Heatmiser Neo Air thermostats x2, Heatmiser UH8 RF (wireless) wiring centre Central Heating (existing): Netatmo radiator valves connected to Netatmo thermostat and boiler relay Other (new): Two Honeywell motorised valves - 1 for CH...
Top