fitting pipe in joists

b21playa · 30 Dec 2006

the last topic got locked due to discussions between plastic and copper

well after reading all the posts i will most likely use plastic pipe with brass compression fittings apart from the piping into the boiler and up to the radiators where it will be copper

anyway if using plastic is it best to notch the top of the joist or drill holes and feed through the middle of the joist?

also how much does the pipe need to be clipped?

kevplumb · 30 Dec 2006

look here

Water Systems · 30 Dec 2006

b21playa said:
the last topic got locked due to discussions between plastic and copper

well after reading all the posts i will most likely use plastic pipe with brass compression fittings apart from the piping into the boiler and up to the radiators where it will be copper

Very wise.

anyway if using plastic is it best to notch the top of the joist or drill holes and feed through the middle of the joist?

Through the middle and thread it.

also how much does the pipe need to be clipped?

See the makers info which most is on the web. Clip very well indeed. Clip before and after joints and before and after bends.

b21playa · 30 Dec 2006

kevplumb said:
look here

cheers

thwey have pics of it going through joists, think i may do the same, seeing as the ceiling have been taken off as well

Softus · 30 Dec 2006

Water Systems said:
also how much does the pipe need to be clipped?

Click to expand...

See the makers info which most is on the web. Clip very well indeed. Clip before and after joints and before and after bends.

Please do read the MIs, and be aware that you can clip too much, because plastic pipe needs room to expand when hot.

In case the point has got missed in the noise, also make sure that you use barrier pipe.

b21playa · 30 Dec 2006

Water Systems said:
b21playa said:

the last topic got locked due to discussions between plastic and copper

well after reading all the posts i will most likely use plastic pipe with brass compression fittings apart from the piping into the boiler and up to the radiators where it will be copper

Click to expand...

Very wise.

anyway if using plastic is it best to notch the top of the joist or drill holes and feed through the middle of the joist?

Click to expand...

Through the middle and thread it.

also how much does the pipe need to be clipped?

Click to expand...

See the makers info which most is on the web. Clip very well indeed. Clip before and after joints and before and after bends.

what do u mean by THREAD IT?

b21playa · 30 Dec 2006

Softus said:
Water Systems said:

also how much does the pipe need to be clipped?

Click to expand...

See the makers info which most is on the web. Clip very well indeed. Clip before and after joints and before and after bends.

Click to expand...

Please do read the MIs, and be aware that you can clip too much, because plastic pipe needs room to expand when hot.

In case the point has got missed in the noise, also make sure that you use barrier pipe.

will do mate

and yes i know barrier pipe has to be used for the heating side at least

Softus · 30 Dec 2006

b21playa said:
what do u mean by THREAD IT?

He means 'put it through the hole'.

Another tip - close the end of the pipe when feeding through/under/over stuff, to prevent debris entering the pipe. Coils of Hep2o come with a red cap for this very purpose.

Also, when making on the connection to the end of the coil, always cut back to clean unscratched pipe.

b21playa · 30 Dec 2006

Softus said:
b21playa said:

what do u mean by THREAD IT?

Click to expand...

He means 'put it through the hole'.

Another tip - close the end of the pipe when feeding through/under/over stuff, to prevent debris entering the pipe. Coils of Hep2o come with a red cap for this very purpose.

Also, when making on the connection to the end of the coil, always cut back to clean unscratched pipe.

cheers mate

are pipe inserts needed if using brass compression fittings?

ChrisR · 30 Dec 2006

are pipe inserts needed if using brass compression fittings?

DEFINITELY.
I would use tape or a sealant of some sort on the olive as well.

Water Systems · 30 Dec 2006

b21playa said:
what do u mean by THREAD IT?

Thread the pipe through the joists.

++++++++++++++++++++++++++++++++++++++++++
ChrisR wrote:
Quote:
are pipe inserts needed if using brass compression fittings?

DEFINITELY.
I would use tape or a sealant of some sort on the olive as well.

All the makers say use only PTFE tape over the olive. Some say use copper olives some brass. Check.
__________________
+++++++++++++++++++++++++++++++++++++++++
Softus wrote:
b21playa wrote:
what do u mean by THREAD IT?

He means 'put it through the hole'.

Another tip - close the end of the pipe when feeding through/under/over stuff, to prevent debris entering the pipe. Coils of Hep2o come with a red cap for this very purpose.

Also, when making on the connection to the end of the coil, always cut back to clean unscratched pipe.

When threading plastic pipe it is best to insert the stop plug provided and tape all the pipe back about 18 inches to prevent scratches. The scratches can prevent a good seal. Also scratches can give weaks spots where the pipe may split after a number of years.
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fitting pipe in joists

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