On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Have you first tried balancing the system by restricting flow to other
radiators?

--
Michael Chare

Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil
--


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On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
--
Cheers,
Roger
____________
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checked.

On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Assuming it is a pumped system rather than natural circulation, and a
normal sized house without "Stately Home" run lengths. I'd expect 15 mm
to be plenty, and 22 mm overkill. Perhaps you could tell us the size (or
BTU rating) of the radiators, and the length of the run, then someone
could give more definitive advice. Blockages are possible but as another
poster said, has the system been balanced?

newshound Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Assuming it is a pumped system rather than natural circulation, and a
normal sized house without "Stately Home" run lengths. I'd expect 15 mm
to be plenty, and 22 mm overkill. Perhaps you could tell us the size (or
BTU rating) of the radiators, and the length of the run, then someone
could give more definitive advice. Blockages are possible but as another
poster said, has the system been balanced?


Thanks guys

I am pretty sure the 15mm plastic runs away from the mains
are
susceptible to catching the crud. The fact that the tees feeding
them point downward at about 45 degrees makes them a crap trap.
Plus, the plastic pipes are not clipped in place but laid
undulating across the ground floor ceiling between first floor
joists.

All other rads in the house heat up respectably. If I limit
heating to upstairs rads only and throttle down all others I can
get some flow to our bedroom rad. But the towel rail in our en
suite is not warming at all.

The pipe layout. From the two principle 22mm copper mains, one
plastic 15mm flow and return pipe each run approx 5m. They then
both tee 4m toward a small double convector rad in one direction
and 2.5m in the other direction to a large towel rail. The rad
is just about warming when thermostats have all closed elsewhere,
but the towel rail does not.

If everything was A1 I believe that 15mm would probably just about
work here. But knowing the likelihood of crud being deposited, I
am inclined to increase the 5m runs to 22mm and blow out the
remaining 15mm runs and see how long that will last. I did run
cleaner numerous times around the system when I took the place on
and have run a MagnaClean filter for the last 12
years.

Phil

?
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TheChief Wrote in message:
newshound Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Assuming it is a pumped system rather than natural circulation, and a
normal sized house without "Stately Home" run lengths. I'd expect 15 mm
to be plenty, and 22 mm overkill. Perhaps you could tell us the size (or
BTU rating) of the radiators, and the length of the run, then someone
could give more definitive advice. Blockages are possible but as another
poster said, has the system been balanced?


Thanks guys

I am pretty sure the 15mm plastic runs away from the mains
are
susceptible to catching the crud. The fact that the tees feeding
them point downward at about 45 degrees makes them a crap trap.
Plus, the plastic pipes are not clipped in place but laid
undulating across the ground floor ceiling between first floor
joists.

All other rads in the house heat up respectably. If I limit
heating to upstairs rads only and throttle down all others I can
get some flow to our bedroom rad. But the towel rail in our en
suite is not warming at all.

The pipe layout. From the two principle 22mm copper mains, one
plastic 15mm flow and return pipe each run approx 5m. They then
both tee 4m toward a small double convector rad in one direction
and 2.5m in the other direction to a large towel rail. The rad
is just about warming when thermostats have all closed elsewhere,
but the towel rail does not.

If everything was A1 I believe that 15mm would probably just about
work here. But knowing the likelihood of crud being deposited, I
am inclined to increase the 5m runs to 22mm and blow out the
remaining 15mm runs and see how long that will last. I did run
cleaner numerous times around the system when I took the place on
and have run a MagnaClean filter for the last 12
years.

Phil

?
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Should add that this is a fully pumped open vented system, with a
WB 24ri heating rads and hw cylinder.

Phil
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Roger Mills Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.


Hi Roger

Is the Speedfit range dismantlable?

Phil
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On 05/03/2018 23:00, TheChief wrote:
Roger Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads.
There is also some crud floating around which is blocking the
feed pipe, or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the
original 22mm copper mains via copper reducing tees/stub pipes
and Hep20 push fit couplers. I have not had any problems with
these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.


Hi Roger

Is the Speedfit range dismantlable?

Phil

Yes. See
http://www.johnguest.com/speedfit/wi...-with-a-twist/
--
Cheers,
Roger
____________
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checked.

On Mon, 05 Mar 2018 23:00:33 +0000, TheChief wrote:

Roger Mills Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads. There
is also some crud floating around which is blocking the feed pipe,
or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the original
22mm copper mains via copper reducing tees/stub pipes and Hep20 push
fit couplers. I have not had any problems with these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
--
Cheers,
Roger ____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.


Hi Roger

Is the Speedfit range dismantlable?

I was about to ask the opposite.

Are the Hep2O joints those with the metal fingers in? Which need a special
tool to take apart again? If so, I never got on with them and had major
problems with 'fit and try' then take apart again. Bought some by mistake,
tried to use them, think I still haven't thrown them yet.

The SpeedFit joints are really easy to fit then take apart again, but seem
fine when locked with the sliding collar. I've used them with 22mm pipe
and a seriously powerful shower pump without any problems.

I've used compression joints with plastic pipe and again that seems to
work well as long as you have the inserts inside the pipe to stop it being
crushed.


Cheers



Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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David Wrote in message:
On Mon, 05 Mar 2018 23:00:33 +0000, TheChief wrote:

Roger Mills Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads. There
is also some crud floating around which is blocking the feed pipe,
or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the original
22mm copper mains via copper reducing tees/stub pipes and Hep20 push
fit couplers. I have not had any problems with these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
--
Cheers,
Roger ____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.


Hi Roger

Is the Speedfit range dismantlable?

I was about to ask the opposite.

Are the Hep2O joints those with the metal fingers in? Which need a special
tool to take apart again? If so, I never got on with them and had major
problems with 'fit and try' then take apart again. Bought some by mistake,
tried to use them, think I still haven't thrown them yet.

The SpeedFit joints are really easy to fit then take apart again, but seem
fine when locked with the sliding collar. I've used them with 22mm pipe
and a seriously powerful shower pump without any problems.

I've used compression joints with plastic pipe and again that seems to
work well as long as you have the inserts inside the pipe to stop it being
crushed.


Cheers



Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

---
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Thanks Roger/John

Yes I think you are talking about Hep20 there. I have used these
in easily accessible places, but have noticed over the
years
that Speedfit has been given better press by the
group.
If I go with replacing the 15mm runs with 22mm I really need
joints I can fit and forget in one of the locations.

I'll take a look at Speedfit for this operation.

Phil
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TheChief Wrote in message:
David Wrote in message:
On Mon, 05 Mar 2018 23:00:33 +0000, TheChief wrote:

Roger Mills Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys

I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads. There
is also some crud floating around which is blocking the feed pipe,
or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.

Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the original
22mm copper mains via copper reducing tees/stub pipes and Hep20 push
fit couplers. I have not had any problems with these.

What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.

Thanks

Phil

Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
--
Cheers,
Roger ____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.


Hi Roger

Is the Speedfit range dismantlable?

I was about to ask the opposite.

Are the Hep2O joints those with the metal fingers in? Which need a special
tool to take apart again? If so, I never got on with them and had major
problems with 'fit and try' then take apart again. Bought some by mistake,
tried to use them, think I still haven't thrown them yet.

The SpeedFit joints are really easy to fit then take apart again, but seem
fine when locked with the sliding collar. I've used them with 22mm pipe
and a seriously powerful shower pump without any problems.

I've used compression joints with plastic pipe and again that seems to
work well as long as you have the inserts inside the pipe to stop it being
crushed.


Cheers



Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

---
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Thanks Roger/John

Yes I think you are talking about Hep20 there. I have used these
in easily accessible places, but have noticed over the
years
that Speedfit has been given better press by the
group.
If I go with replacing the 15mm runs with 22mm I really need
joints I can fit and forget in one of the locations.

I'll take a look at Speedfit for this operation.

Phil
--


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Whoops that should be thanks Roger/David
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It's been said but balance your system flows. Consult the wiki.
Nothing wrong with Hep2o but if it's not barrier type you may need to check the concentration of inhibitor.

Whatever happened to the resident loony AKA man of mystery? He could be relied upon to cock up plastic joints.

In article ,
Cynic wrote:
Whatever happened to the resident loony AKA man of mystery? He could be
relied upon to cock up plastic joints.

Hacksaw man. ;-)

--
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Dave Plowman London SW
To e-mail, change noise into sound.