UNDERFLOOR HEATING GUIDE AND INSTALL PART 2 - Plumbing Tips 

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I am not a plumber but I have been working for a plumbers merchant for 1.5 year now. I do my best to learn more and more to be able to help our customers. All Your vids have helped a lot. I learn a lot from them. Thank you. Daniel

Cats are by nature, expert heat seekers, having your cat lying out on your floor is the only certificate of excellence and rating that you need, to know that your heating system is working like a charm. Cat Rating : 5 Star. Job well done. I've subscribed, but only because George gave you a certificate of competence and confidence.

fantastic, i now have some idea as a non-plumber how my system works. thanks so much!

I've been watching you're videos because I want to install system like that at home. Everything looks straight forward and simple! Just looks ,because I lack the f. thing that experience gives you : confidence!

Your videos used to be of a higher standard then you do now. This video does a very good explanation of underfloor heating for those to understand it, from a non plumbers view.

Can you show a pressure test on the next install and why you should do it. Amazing channel 🖒

This was the best video on U/Flr heating I have seen so far. Improvements could have been a view and detailed explanation of the wiring centre and you terminating the pipes into the manifolds. I am about to buy and install U/Flr heating in my 2 extensions but am unsure how the zones work, I have 4 different rooms but dont want all 4 at same temperature or on at same time if not required, do I need 4 different systems of can this unit handle 4 different systems on a single larger manifold with 4 individual room stats? I also know the "am I getting divorced today or not" feeling, my missus wants a nice big house but doesn't want the mess and hassle involved to get there. 😮

Extension looks lovely

Looks like a good system wavin have there. As always great tips and explanations. Thanks for your help.

Good job at making this video. In Poland we install this kind of underfloor heating in new build houses as standard. Ususly each loop outlet has installed flow meter so you can balance the flows and take a note of flow on each loop and you can occasionaly check if the flow still stays on at correct level. The manifold with pump unit is mounted inside wall cabinet that fash with the wall for neat look.

Another non--plumber! I'm a sparks and interested in learning more about the other great trade. Well done

So happy for cat!

Doing underfloor heating at college next month.... This is really helpful.

Another great video as i'm working on a smart control system installed on this very Wavin manifold. I didn't understand what the plumbing did until i watch this video, so thank you as it allows to test the system properly from our smart controllers

Been watching your videos since 2014. Still can't bend pipes. 😂😂

another great video thank you

Ifound on the secend part and it is Very nice good job and very informative for everyone thanks

Thank you for the info.

Great videos so far, very helpful, Hold Tight 👊

excellent video

I guess those actuators are thermoelectric - slow but low powered and silent. So why choose normally-closed rather than normally-open? I guess the choice was made by Wavin or whoever made the controller, but wouldn’t normally-open give both a faster start-up and fail-warm rather than fail-cold?

Not sure if anyone has mentioned this im sure they have but if not.. then ufh should always be zoned off if it is used in a system with radiators for the reason that ufh runs for alott longer than radiators. If it was on the same zone as heating then rads would satisfy the room stat and switch it all off prematurely before the ufh even got going.

Where do you connect that wire what comes out of the 2 port valve ? To a thermostat which is located in the room where is underfloor heating ?

Thanks!

love your vids mate! Informative and hilarious!

Lovley But how do you wire mate I mean the controls Many thanks in advance

I was told recently to be warned that a manifold can be noisy. What’s typical? How does this compare to say having a fridge in the kitchen? Can you sound reduce the enclosure cabinet with acoustic treatment to combat this?

Hello! When the blue UF heating circuit valves are closed, isn't the pump pumping against a closed head??

Hi. Thanks for the video. It is really helpful. I am installing an underfloor heating myself. Really appreciate if you can provide me a few suggestions. I have put screed on top of the heating system. Just wondering two things 1)How long should i leave the screed before i do the flooring. Can i keep the room temperature at about 20 degrees centigrade (using a room heater) for about 7 days and do the floors or do i need to keep it for 21 days for the screed to settle and then gradually get some hot water through the pipes. Unfortunately this will take about 28 days which will be a bit difficult especially with a young child at home. 2) I have a got 22 mm engineered wood for the floor. I was planning to put an underlay and put the engineered floor directly. But someone recommended me to put a damp proof membrane, followed by a 6 mm wood play (with large holes in it), then underlay and then the 22mm wooden floor. Is this required. Will it not be too thick under layer for the underfloor heating to work efficiently. Thanks in advance for your valued suggestions. Regards

I wanted to ask , when underfloor heating thermostat is turned up does combi boiler start calling for heat ?

There should be a high temperature pipe stat set to 50C to ensure that high temperature water is not pumped into the UFH loops. If the temperature blending vale fails that may the case with the pipe stat cutting out the boiler.

hi i have boiler in toilet and manifold in kitchen under the stairs cupboard i have 2zones 1st floor radiators ground floor wet underfloor heating my question is can put 2 valves next to boiler for each heating zones. as most people they put 2zone valve next to manifold.

An interesting couple of videos. What type of boiler do you have and would there have been any differences in the installation for the other type(s)?

Hi mate please can you do how to bleed and fill underfloor heating system - becuase parts of my underfloor is not warming

Quality videos mate .

Sorry to sound daft, but what is Flow and Return and how to check? Thanks Great Video!

I have a question... So we have moved into a house with a concrete floor for our kitchen. We are about to have a funky resin floor laid on top, but that will still be cold on top of the concrete. So after speaking to a plumber, he suggested a low-profile underfloor heating system to avoid digging up the current concrete floor. As our resin floor guy needs a concrete screed to put his resin on though, can we put a flexible self-leveling screed on top of those low-profile Underfloor heating systems, without issues as far as you know? I'm struggling to get someone to give me a 100% factual answer.

Loving your vids man. Why is the ceiling so hight in the new kitchen? Almost looks like you forgot to add a floor 😂 I've only just started doing few bits with plumbing with help from your vids. Thanks 👍

Fantastic How to Video! Well Done. Does anyone know how to drain the under floor heating system. I have the same one, or similar. I just need to drain, add cleaner, re-drain and then add inhibitor. Thanks

Great video and a brilliant channel. Looking for some advice.... Can I fit both a wet undefloor heating system like the one in the video and also then fit an electric underfloor heating mat? The idea is not to use both, but have the choice of which source of heating will be most cost effective in the future. It is a new floor consisting of 80mm insulation then 75mm of screed and tiles will go over the top. My original plan was electric mats because of the ease of installation and a smaller original outlay. My original planning for the project was 2 years ago and since then electricity prices have dramatically increased so I am wondering if it would be wise to put the pipework under the screed which will give me the option of a wet system if I decide to at a later date. This is for my wife's new boarding cattery so it is independent of the house heating system and due to our location the only current feasible option for a wet heating system would be an oil fired boiler and I fear that oil and fossil fuels will become heavily taxed and ever more expensive so it could be good to have the choice of which system to use.

Enjoy these immensely

Could you tell me if it is possible to replace an isolation ball valve on my underfloor heating manifold without draining the system ? Hope you can help, thanks.

Can you put zone valve on return pipe?

Cheers James. Your extension looks the dogs mate.

Hello, very helpful video / guide! I have enjoyed watching a few of these plumberparts videos and non-coincidentally have just had my house completely gutted back to pretty much 4 outside walls then heavily extended (totally rebuilt new from a husk effectively) and have a couple of questions for anyone in the know which may be able to help advise on my requirements before i go ahead with the heating system install...? The place is a pretty sizable (4000+ sq/f in total overall) consisting of 5 bedrooms over 3 floors (loft conversion) with 4 en-suites (3 baths, 4 showers), with the ground floor having underfloor hydro heating (2000 sq/f) which is predominately open plan lounge / kitchen - with 2 receptions rooms + Utility + toilet . My plumber has recommended an Ideal Logic30+ along with a Megaflo water cylinder, my question is - When i look at guides / recommendations for boilers for the size of property it would appear I should go with a 40+KW boiler due to the amount of bathrooms etc - however - as I am using a Megaflo Mains pressure cylinder - does this mean that the 30KW Ideal boiler hes recommending doesnt need to be as powerful as the cylinder makes up the difference in power requirements? The other thing is - the plumber is saying that the Ideal Logic Plus 30 is a good boiler with a 7 year warranty and he never has any problems with them, I have had a few Valiants over the years and one newly installed one completely destroyed itself in about 5 years and had to be pretty much completely replaced with parts, so am now rightly dubious of the brand. Could anyone clarify the above questions and / or what would be the best boiler and cylinder combo based on my requriements? Any help would be very much appreciated. Ta

Hello, great video really helpful, would you recomend to have a boiler dedicated to the system exclusively? or how do you manage to reintroduce the cold water to the flow?

when u refer to degrees temp I am assuming we are talking metric. Just want to confirm this.Great videos

Loving the videos which help me and home and for some clients, I was interested to see how to wire the Underfloor valve and pump to fire up the boiler without switching on the s plan CH and HW pump

Did you do the next video re wiring in the waving programmer and stats into the system? Great video thanks :)

Love your videos! Your energy and enthusiasm are infectious! I have a standard heating system with radiators. I’m planning to switch to an Air Source Heat Pump, so I’m planning to switch to underfloor heating. Can I just use the existing radiator pipes to each room to supply the retro fitted UFH system to each room, rather than fitting a manifold etc? And would a standard thermostatic radiator valve above floor level in each room successfully allow temperature control of each room? Thanks for any thoughts!!

Very informative video! I have a question. Zoning off valve of my heating system is broken is not responding to Thermostat. Room keeps heating and wastes energy. Can I stop the Wilo pump for few days till I get new part? Or stopping pump and flow can cause damage to system?

We're just getting quotes for a heating system and the plumber says it's really expensive to run, so 2 questions really 1. Are you missing any arms or legs? 2. Is it something I could do myself? (I'm pretty savvy and have watched loads of your awesome vids)

Here's a thinker for you. I have built raised growing beds for vegetables in the garden, now UK isn't exactly St tropez but I want to grow all year round so I'm thinking of running a loop of this in the bottom of the each growing bed, so insulation, a loop of pipe, perhaps covered in sand to spread the heat then heavy duty polypropylene landscape fabric or a dpm on top to keep things separate then add the compost and connect to my central heating system. I may put a cloche on top like a small greenhouse. what do you think, possible? good or rubbish idea or any suggested changes would be greatly appreciated.

I wonder how you balancing loops, set 1st on 5 and 2nd on 6. What flow you have and what lenght of pipe did You use?

Hi. James. If the actuators are closed and take some time to open. Will the pump overheat trying to force water around the circuits before they open.

спасибо.

Great vid thanks

Should nt you have a bypass valve before the manifold?

Quick question probs sounds stupid but can you change the pump side to right so the flow is from that side ... the unit doesn't have a directional flow on each side does it ? and if so is that true for all manifolds ? cheers

How do you stop the manifold pump coming on when your hot water or radiator zones call for heat?

Hi great video but I have a question. Where on a conventional cylinder system do I connect onto the flow and return or does it not matter? Also, do I need to add a valve to call for heat independently from the central heating?

Watched several of these mostly because of your energy and humour. Your wife would be crazy to divorce you.

James, can you have this on the same zone as other radiators, just wondering because of it having a pump on it too. It looks like this is a separate zone. We're doing a dual zone system (up and downstairs) on our house but wanted to install overlay UFH in our hallway, bathroom and kitchen. Trust it's just a wiring job to incorporate this into the existing zones.

Could you do a video relating to UFH with air to water heat pumps and balancing?

Do the motorised valves have to match the brand of manifold, just thinking ahead when they break incase I select a manifold that isn't in business anymore? It's 5 years old now, any recommendations for good brands? Great detailed video BTW.

What type of conventional water heater is better to use? solar panels can be used?

First Video I Watched..... Subscribed... :) Great Job

you are a star.

Overall good video guidance :)

Hi, great video as always would just like to know.......Can a nest thermostat be used to control this? Thanks G

Great vid as usual. Does every underfloor heating system have a two port valve? I'm looking at the prowarm system and it doesn't seem to have one. Also I have 22m2 of floor to lay, do I really need two loops? Again, the prowarm system doesn't seem to have two loops for that size.

I live in a house with combi boiler and radiators how do i connect an extension with underfloor heating to this system

I’m curious about the brand of the manifold and electronic actuators

Can under floor heating to be added to a combi boiler that uses Hive? Thanks.

Iv got a pointless radiator in my utility room in a ideal location to put the brains of under floor system can the flow and return of this rad be used to feed a manifold ?

What's the name of that heating system?

Hi James I'm installing underfloor heating in my new extension using my existing combi. I know i need a 2 port motorised valve for the UFH. Will i need another 2 port motorised valve for the existing radiators?

Hi, does your system include a "high-limit" thermostat? I read you need one as an additional safeguard, but not sure. I guess it goes above the mixing value or is it part of the mixing valve unit? Cheers

how is the 2 port valv and the pump wired up and the thirmastat

How are you adding inhibitor to a new UFH system. Need to get some X700 into my new loops?

Hi what size pipe was used in the floor was it 15mm or 16mm? Thanks

Hi mate, can I use under floor heating system in combi boiler. Thanks

Hi - I having an new extension put into on the ground floor and have found your vid useful, in regards to having the works done by a third party is there anything I need to look into like should they be certified etc? and if so what certification should they have?

Good video bud, Question, is it possible to add underfloor heating to an existing system..? We have a bedroom, built off the house over a car port and its colder than the rest of the house, typical its the master bedroom too.... We were hoping to take the boards up, lay new insulation and then run underfloor heating in it off the radiator pipes. Can this be done, of course, I wouldn't attempt it myself, it would be done by a professional, was just curious? Cheers

Hi, great video.. just wanted to know, does the pump require to be wired to mains electricity? Or does it just run off of the water flowing through it ? Many thanks, Phil

Hi mate great vid, how effective is this to heat a room?... im going have a 7m x 3.5m orangery with a big glass lantern and about 5/6m of glass along the long wall (folding or sliding).. its north facing too, will it get cold with a system like this?

James great vid....I have got the exact same Waven kit coming and looking to put the zone valve in like you did..I know you cant tell me how to wire it but I am having a debate with my electrician whom like me has never done UFH before and we are stuck on the wiring of the zone valve in relation to the standard wiring of the 16 zone controller. Standard as per Waven is boiler, pump and live to controller....so where does the zone valve go to please. Oh and yes I phoned Waven and they struggled to help even when I said we were installing a system the same as yours that is on the Waven blog site they cant supply me with the wiring diagram which includes a zone valve.

I can t find part 3 where your lying in your speedos on the floor with the cat drinking a Piña colada lol.

great video and installed underfloor heating in one small room and screed the area. However, I wasn't sure/Aware that I needed to pressure test the the pipes before screed was laid. have I installed it correctly? or is the whole project ruined? :(

Fantastic Video! What is a great underfloor system to use in the UK for multi room use?

hello mate, can you use Y plan for underfloor heating ?

What happens when the 2 ballofix valves behind the ply wood start leaking in 10 years time

11. One hotter than 10. Awesome

Very nice,

Great video. What's the make n model of the whole manifold you have used including the valve? Thanks

Great vid, is there a reason why the actuators are designed to take a while to open up? Cheers!

Did you refer to the blending pump instructions with regards to setting the speed of the pump, or is there an equation used for working out the appropriate speed on UFH? Cheers

You got a wiring diagram?

No membrane between insulation board and Scread? The insulation board should be protected from the scread