I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and 1/16 inch) with something flexible, about 2 metres apart, to carry hot water.
Lots of PVC piping available, but I can't find anything to mate the iron to the PVC.
Any suggestions, please?
> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and
> 1/16 inch) with something flexible, about 2 metres apart, to carry hot
> water. Lots of PVC piping available, but I can't find anything to mate the
> iron to the PVC. Any suggestions, please?
Your flexible pipe will need to be MDPE as that is what the other end of the adaptor expects but it may be possible that a universal-unversal version exists?
> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and 1/16 inch)
That is 3/4" nominal bore, so you are looking for 3/4" fittings. Iron and steel pipes are not measured by the OD. Nor are rigid PVC pipes, if the size is given in inches.
> with something flexible, about 2 metres apart, to carry hot water.
> Lots of PVC piping available, but I can't find anything to mate the iron to the PVC.
> Any suggestions, please?
If the iron (or steel unless it is very old) pipe has threads on the ends, the easiest way would be to look for 3/4" BSP female threaded adaptors to your choice of flexible pipe. Alternatively, there are Primofit compression fittings for connecting steel pipes to HDPE.
>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and
>> 1/16 inch) with something flexible, about 2 metres apart, to carry hot
>> water. Lots of PVC piping available, but I can't find anything to mate the
>> iron to the PVC. Any suggestions, please?
>Your flexible pipe will need to be MDPE as that is what the other end of the
>adaptor expects but it may be possible that a universal-unversal version
>exists?
>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and 1/16 inch)
>That is 3/4" nominal bore, so you are looking for 3/4" fittings. Iron
>and steel pipes are not measured by the OD. Nor are rigid PVC pipes, if
>the size is given in inches.
>> with something flexible, about 2 metres apart, to carry hot water.
>> Lots of PVC piping available, but I can't find anything to mate the iron to the PVC.
>> Any suggestions, please?
>If the iron (or steel unless it is very old) pipe has threads on the
>ends, the easiest way would be to look for 3/4" BSP female threaded
>adaptors to your choice of flexible pipe. Alternatively, there are
>Primofit compression fittings for connecting steel pipes to HDPE.
On Tuesday, September 25, 2012 1:24:42 PM UTC+1, Bob Martin wrote:
> Probably is galvanised - 1936 central heating.
> No screw threads as I've had to cut out a blocked section.
> Thank you.
Ah, if it's CH and not potable, then iron is used but you have to use inhibitors to stop corrosion. Use PEX, JG Speedfit or similar barrier pipe, designed for CH. Don't use MDPE.
Re joints, I'd expect Speedfit do a grip ring fitting, but I'd look further along the pipes for a screwed joint
I could undo with a two stilsons to use a threaded adaptor.
Bob Martin wrote:
> in 1165230 20120925 130223 Nightjar <c...@insert.my.surname.here.me.uk>
> wrote:
>>On 25/09/2012 12:20, Bob Martin wrote:
>>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and
>>> 1/16 inch)
>>That is 3/4" nominal bore, so you are looking for 3/4" fittings. Iron
>>and steel pipes are not measured by the OD. Nor are rigid PVC pipes, if
>>the size is given in inches.
>>> with something flexible, about 2 metres apart, to carry hot water.
>>> Lots of PVC piping available, but I can't find anything to mate the iron
>>> to the PVC. Any suggestions, please?
>>If the iron (or steel unless it is very old) pipe has threads on the
>>ends, the easiest way would be to look for 3/4" BSP female threaded
>>adaptors to your choice of flexible pipe. Alternatively, there are
>>Primofit compression fittings for connecting steel pipes to HDPE.
On Sep 25, 12:20 pm, Bob Martin <bob.mar...@excite.com> wrote:
> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and 1/16 inch)
> with something flexible, about 2 metres apart, to carry hot water.
> Lots of PVC piping available, but I can't find anything to mate the iron to the PVC.
> Any suggestions, please?
It's possible to hire an electric pipe threading tool that exerts no
torque on the existing pipe sytem. (There is an anchor that grips the
pipe.)
If you don't thread it,there is a strong possibility of leaks
depending on the state of the outside of the pipe. (pitting/corrosion
etc) with compression fittings.
However if it's that bad, you need to consider replacing all.of it.
> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and > 1/16 inch)
> with something flexible, about 2 metres apart, to carry hot water.
> Lots of PVC piping available, but I can't find anything to mate the iron > to the PVC.
> Any suggestions, please?
The cowboy option is to get some thick walled plastic pipe with an internal diameter matching the external diameter of the iron pipe, and then secure it with jubilee clips.
Some of the large bore clear plastic pipe I have seen is very (vey) thick walled although I doubt it is approved for CH use.
Cheers
Dave R
-- No plan survives contact with the enemy.
[Not even bunny]
>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and >> 1/16 inch)
>> with something flexible, about 2 metres apart, to carry hot water.
>> Lots of PVC piping available, but I can't find anything to mate the iron >> to the PVC.
>> Any suggestions, please?
> The cowboy option is to get some thick walled plastic pipe with an > internal diameter matching the external diameter of the iron pipe, and > then secure it with jubilee clips.
> Some of the large bore clear plastic pipe I have seen is very (vey) thick > walled although I doubt it is approved for CH use.
Think car radiator hose!
-- No plan survives contact with the enemy.
[Not even bunny]
>> in 1165230 20120925 130223 Nightjar <c...@insert.my.surname.here.me.uk>
>> wrote:
>>>On 25/09/2012 12:20, Bob Martin wrote:
>>>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1 and
>>>> 1/16 inch)
>>>That is 3/4" nominal bore, so you are looking for 3/4" fittings. Iron
>>>and steel pipes are not measured by the OD. Nor are rigid PVC pipes, if
>>>the size is given in inches.
>>>> with something flexible, about 2 metres apart, to carry hot water.
>>>> Lots of PVC piping available, but I can't find anything to mate the iron
>>>> to the PVC. Any suggestions, please?
>>>If the iron (or steel unless it is very old) pipe has threads on the
>>>ends, the easiest way would be to look for 3/4" BSP female threaded
>>>adaptors to your choice of flexible pipe. Alternatively, there are
>>>Primofit compression fittings for connecting steel pipes to HDPE.
>> Three replies within the hour, and better advice than I've got from two
>> days of phoning and googling.
>> This newsgroup is priceless!
>The god of knowledge shines on people who at least first try to JFGI ;->
I phoned 6 local plumbing centres yesterday, each passing me on to the next,
until I got the Universal Transition Fittings at the local Drain Centre.
However, I'm disturbed to be told by another poster that I shouldn't use MDPE
for CH as, although I only needed 2 metres, I had to buy the minimum qty of 25m.
And it isn't anywhere near as flexible as I'd hoped.
> I phoned 6 local plumbing centres yesterday, each passing me on to the
> next, until I got the Universal Transition Fittings at the local Drain
> Centre. However, I'm disturbed to be told by another poster that I
> shouldn't use MDPE for CH as, although I only needed 2 metres, I had to
> buy the minimum qty of 25m. And it isn't anywhere near as flexible as I'd
> hoped.
It gets more flexible if you run some hot water through it.
The only reason I can see why it might not be a good idea is it may be permeable to oxygen - ie let a little into the CH water causing corrosion.
On Wednesday, September 26, 2012 8:12:18 AM UTC+1, Bob Martin wrote:
> I phoned 6 local plumbing centres yesterday, each passing me on to the next,
> until I got the Universal Transition Fittings at the local Drain Centre.
> However, I'm disturbed to be told by another poster that I shouldn't use MDPE
> for CH as, although I only needed 2 metres, I had to buy the minimum qty of 25m.
Plumb Center, Drain Center, etc.. They're tossers, just looking to charge you the maximum possible, they don't care that you'll never go back. They don't want you back, they cater for trade accounts and negotiated discounts. If Screwfix don't stock it, try BES.co.uk.
Car radiator hoses are mostly permeable to oxygen, which is partly why you should change most anti-freeze every few years. There's no reason why you couldn't use copper, if you keep the inhibitors up, but it's not a pukka fix.
I've never run hot water through any PE, I suspect it will become too floppy to be useable.
> in 1165229 20120925 125738 Onetap<one...@talk21.com> wrote:
>> On Tuesday, September 25, 2012 12:20:37 PM UTC+1, Bob Martin wrote:
>>> Any suggestions, please?
>> Are there screw threads on the ends of the iron pipes?
>> I'd just use whatever PEX is available, JG Speedfit or similar. How you'd attach it depends on the above.
>> Steel pipe isn't good for HW, the oxygen in the water causes corrosion problems. Galvanized was used. You probably know that.
> Probably is galvanised - 1936 central heating.
> No screw threads as I've had to cut out a blocked section.
> Thank you.
Is it feasible to remove more of the pipe, by tracing each piece back to a threaded joint. If you could then unscrew both pipes, you could replace the whole length with plastic - using threaded joints at each end.
-- Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom checked.
>On 25/09/2012 13:24, Bob Martin wrote:
>> in 1165229 20120925 125738 Onetap<one...@talk21.com> wrote:
>>> On Tuesday, September 25, 2012 12:20:37 PM UTC+1, Bob Martin wrote:
>>>> Any suggestions, please?
>>> Are there screw threads on the ends of the iron pipes?
>>> I'd just use whatever PEX is available, JG Speedfit or similar. How you'd attach it depends on the above.
>>> Steel pipe isn't good for HW, the oxygen in the water causes corrosion problems. Galvanized was used. You probably know that.
>> Probably is galvanised - 1936 central heating.
>> No screw threads as I've had to cut out a blocked section.
>> Thank you.
>Is it feasible to remove more of the pipe, by tracing each piece back to
>a threaded joint. If you could then unscrew both pipes, you could
>replace the whole length with plastic - using threaded joints at each end.
Tried that but they are solid. Almost turned the header tank over.
>>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1
>>> and 1/16 inch)
>>> with something flexible, about 2 metres apart, to carry hot water.
>>> Lots of PVC piping available, but I can't find anything to mate the
>>> iron to the PVC.
>>> Any suggestions, please?
>> The cowboy option is to get some thick walled plastic pipe with an
>> internal diameter matching the external diameter of the iron pipe, and
>> then secure it with jubilee clips.
>> Some of the large bore clear plastic pipe I have seen is very (vey)
>> thick walled although I doubt it is approved for CH use.
> Think car radiator hose!
eBay for *silicone* hose; reinforced, pricey, but available in a good range of diameters for the boy racer brigade.
> On Wednesday, September 26, 2012 8:12:18 AM UTC+1, Bob Martin wrote:
>> I phoned 6 local plumbing centres yesterday, each passing me on to the next,
>> until I got the Universal Transition Fittings at the local Drain Centre.
>> However, I'm disturbed to be told by another poster that I shouldn't use MDPE
>> for CH as, although I only needed 2 metres, I had to buy the minimum qty of 25m.
> Plumb Center, Drain Center, etc.. They're tossers, just looking to charge you the maximum possible, they don't care that you'll never go back. They don't want you back, they cater for trade accounts and negotiated discounts. If Screwfix don't stock it, try BES.co.uk.
> Car radiator hoses are mostly permeable to oxygen, which is partly why you should change most anti-freeze every few years. There's no reason why you couldn't use copper, if you keep the inhibitors up, but it's not a pukka fix.
> I've never run hot water through any PE, I suspect it will become too floppy to be useable.
I think the problem is not so much floppiness as *creep*, i.e. it will gradually stretch under the pressure and gravity loading until it fails. Is it a horizontal run? If so it will survive longer with frequent supports.
> >>> I need to connect two pieces of iron pipe (ouside diameter 27mm, 1
> >>> and 1/16 inch)
> >>> with something flexible, about 2 metres apart, to carry hot water.
> >>> Lots of PVC piping available, but I can't find anything to mate the
> >>> iron to the PVC.
> >>> Any suggestions, please?
> >> The cowboy option is to get some thick walled plastic pipe with an
> >> internal diameter matching the external diameter of the iron pipe, and
> >> then secure it with jubilee clips.
> >> Some of the large bore clear plastic pipe I have seen is very (vey)
> >> thick walled although I doubt it is approved for CH use.
> > Think car radiator hose!
> eBay for *silicone* hose; reinforced, pricey, but available in a good
> range of diameters for the boy racer brigade.
Yeah, but why bother with that?
Push-fit PEX is designed for CH, it's flexible and has an oxygen barrier and is available
from all plumbers' merchants and most DIY sheds.
