using plastic pipe in a new house concrete floors

[mark_mc]

i am thinking of using plastic pipe in a new build.

Im going to use the hepworth pipe in pipe system the hep pipe in condiut, just thinking of using a hep bend at the end of the lines to terminate to each radiator to bring the upstands up in copper

what do you think about using a hep fitting under a concrete floor, the system is going to be open vented not sealed.

 

[fagsanbooz]

Wouldn't recommend using fitting in concrete floor, besides i'm not sure it will fit into 'conduit', will it? By the way, why 'vented'? any special reason?

 

[mark_mc]

its hep pipe in a conduit cover for concrete floor install im sure someone uses hep fittings under concrete floors. anyone any experience

 

[WHPES]

I presume it is from a thermal store / woodburner as you say "vented". Am I correct?

Don't like hep as I don't trust the flimsy grab rings. Use PolyPlumb

 

[mark_mc]

your very correct there is a stove going in all that pipework is going to be done in 28mm copper pipe so dont worry not using hep there.

im using a brass manifold under the stairs and running 15mm hep in conduit out to the radiators, dont want to put hep into the radiator from the floor so looking to terminate at the radiator and put a plastic fitting on and bring up in copper.

So have you used ployplumb under concrete floors WHIPES??? good job> as long as put on right

 

[Bartdude]

I've seen it done before but I just don't like the idea of it. I use Uponor MLCP pipe with crimped fittings,more expensive but fit and forget.

Hep doesn't use the green grab rings anymore though,it's white now too.

 

[tackleburger]

I've seen it done before but I just don't like the idea of it. I use Uponor MLCP pipe with crimped fittings,more expensive but fit and forget.

Hep doesn't use the green grab rings anymore though,it's white now too.

Yes and massive

 

[mark_mc]

well what about the new hep fittings under a concrete floor

 

[plumbster3456]

if your worried wrap the fittings in densil tape to protect them if they going in concrete

 

[Spike295]

Best bet & for total peace of mind is to phone the manufacturers of Hep, ask for technical & get the answer straight from the horses mouth.

 

[Gray0689]

Why do you want to use hep fittings underfloor( your not allowed unless in trunking) if using pipe in pipe get the shoes brackets then you can take right up to rad valve no fittings in floor then

 

[WHPES]

I was going to suggest Uponor. Best for the job.

 

[plumbster3456]

Why do you want to use hep fittings underfloor( your not allowed unless in trunking) if using pipe in pipe get the shoes brackets then you can take right up to rad valve no fittings in floor then

he is asking can he get away with putting the pipes and fittings in concrete the answer is no he shouldnt but the other answer is I have seen a lot worse and yes things like this do happen putting pipes in conduit/trunking is expensive and does not sound like an option he wants to take so tghe next best cheapest option he should not do but can if he likes is wrap the stuff in densil tape this is one cheap option he has.

 

[Gray0689]

he is asking can he get away with putting the pipes and fittings in concrete the answer is no he shouldnt but the other answer is I have seen a lot worse and yes things like this do happen putting pipes in conduit/trunking is expensive and does not sound like an option he wants to take so tghe next best cheapest option he should not do but can if he likes is wrap the stuff in densil tape this is one cheap option he has.

What's denso tape going to do? Apart from protect copper

 

[Spike295]

[DLMURL]http://www.hepstore.co.uk/downloadPDF.aspx?id=1021[/DLMURL]

Have a look at this link, got some very interesting stuff relating to your requirements from section 19 onwards.

 

[WaterTight]

it was a long time ago but swear i saw my old boss run plastic pipe with lagging round to protect it before it was concreted over. is that def a bad idea then? seem to remember he said the concrete eats at the plastic but not the lagging? i could be making this up but that's what i remember.

 

[PlumbingSucks]

in most new builds now they drop 10mm hep down to each rad behind dot and dab with a terminating plate like a single blank elictrical face plate behind the rad. Then 10mm straight into the rad valves with a 10x15 chrome elbow. Easy, Cheap and vertually no pipe on show.

 

[Gray0689]

it was a long time ago but swear i saw my old boss run plastic pipe with lagging round to protect it before it was concreted over. is that def a bad idea then? seem to remember he said the concrete eats at the plastic but not the lagging? i could be making this up but that's what i remember.

You still lag plastic pipe but for thermal efficiency and will help expansion not protection from concrete

 

[plumbster3456]

What's denso tape going to do? Apart from protect copper

what is it going to do apart from protect copper did you just ask that? maybe fly to the moon or cook my dinner .... what you think its going to do rocket scientist? protect the plastic aswell.

 

[plumbster3456]

as stated to the rocket scientist in the house if you are going to put insulation around the pipe which is obvious if your putting in concrete as the pipes will just burst with the concrete when the pipes expanding etc then wrap in densil tape so no concrete gets through to the pipe at all

 

[WHPES]

Wouldn't put denso tape round plastic pipe - don't know how the plastic will react to the grease.

 

[Gray0689]

as stated to the rocket scientist in the house if you are going to put insulation around the pipe which is obvious if your putting in concrete as the pipes will just burst with the concrete when the pipes expanding etc then wrap in densil tape so no concrete gets through to the pipe at all

Concrete won't damage plastic pipe and for the comment plumbster
Would you lag and wrap in denso underfloor heating pipe as it's plastic
Acording to your comment it will burst lol catch yourself on

 

[plumbster3456]

Concrete won't damage plastic pipe and for the comment plumbster
Would you lag and wrap in denso underfloor heating pipe as it's plastic
Acording to your comment it will burst lol catch yourself on

ok proffeser gray you can put plastic in concrete all day long if you like but you trying to tell me that if say it is heating pipes with push fit fittings that way expansion and contraction those pipes wont burst? ok rocket scientist you do that if you want i wont.
and as for under floor heating I am not going to pretend to know lots about as i dont but if this is allowed to go under screed or what ever i can gaurantee you it will be a different grade of plastic with the push fit fittings placed in allowable areas.

didnt you learn at college or did your 6 week course teach you nothing co efficient linea expansion I thought a rocket like you would no this

 

[plumbster3456]

Wouldn't put denso tape round plastic pipe - don't know how the plastic will react to the grease.

THE PLASTIC IS IN INSULATION THE DENSIL IS AROUND IT WHY WILL IT REACT? i THINK DENSIL IS BETTER FOR PLASTIC THAN CONCRETE DONT YOU? COME ON THINK ABOUT IT

 

[Gray0689]

Read my post muffet I said no fittings in concrete