I have read on this forum the fors and against for plastic and push on fittings but I wonder is there going to be any problems when inhibitor and cleansers and power flushing are introduced to a system that is plastic or part plastic and copper.
plastic pies
- Thread starter byron
- Start date
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Oh you meant pipes not pies, how disappointing.
Man from Cuprofit said they don't like Everflux because it attacks stainless steel, which I thought was quite an admission (though it's obvious), but was quite happy with for example DS-40.
More interesting is the statement on the Potty boiler installations that says the system should be able to stand 110ºC at 3 bar.
Hepworth say the pipe melts at 125, but is ok for "a short period" at 114º, at 3 bar. Bit close really!
Man from Cuprofit said they don't like Everflux because it attacks stainless steel, which I thought was quite an admission (though it's obvious), but was quite happy with for example DS-40.
More interesting is the statement on the Potty boiler installations that says the system should be able to stand 110ºC at 3 bar.
Hepworth say the pipe melts at 125, but is ok for "a short period" at 114º, at 3 bar. Bit close really!
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call me old fashioned but i dont think plastic should be used on anything but waste pipes. (barring UFH)
hey i know. so do my customer base which keeps me very busy. 40 goin on 60. stiff will allways beat floppy in my book.
Certainly for stiffness, and for [low] cost of materials, but not for speed of installation, and not for ease of fitting where access is limited, or for between ceiling and floorboards where you can't risk waving a blowtorch about, or for demountability, or for longevity...bab said:
I must be a little old fashioned !
Because plastic cannot withstand fault conditions on heating circuits, I do not consider that plastic is safe for use on pressurised heating systems.
Last week I spoke to someone who had about £4000 damage caused because some bodger had used a plastic connector rated at a maximum of 65*C for a heating circuit and that was an OPEN vented system!
Tony
Because plastic cannot withstand fault conditions on heating circuits, I do not consider that plastic is safe for use on pressurised heating systems.
Last week I spoke to someone who had about £4000 damage caused because some bodger had used a plastic connector rated at a maximum of 65*C for a heating circuit and that was an OPEN vented system!
Tony
From the Hepworth Installer Guide:Agile said:
[code:1]Table No. 1 Peak Life Cycle Operating Temperatures/Pressures (°C)
20 30 40 50 60 70 80 95 Short Malfunction at 114°C
Safe pressures:
Bar 12 11.5 11 10.5 9 8 7 6 3
psi 174 167 160 152 131 116 102 87 43.5
Head of water (m) 120 115 110 105 90 80 70 60 29
[/code:1]
and:
[code:1]Hep2O® has a design life expectancy of 50 years, which is based upon the operating conditions given in Table No. 1. As a result of its rigorous Quality Management Programme Hepworth Building Products offer a 50 year guarantee against defects in materials or manufacturing of all Hep2O® pipe and fittings.
[/code:1]
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