I can't help but wonder why soldered fittings/copper pipe are still used, if at all on domestic potable water services.
one reason is that copper is germicidal https://www.smithsonianmag.com/science-nature/copper-virus-kill-180974655/
When researchers reported last month that the novel coronavirus causing the COVID-19 pandemic survives for days on glass and stainless steel but dies within hours after landing on copper, the only thing that surprised Bill Keevil was that the pathogen lasted so long on copper.
Page 9 of 34 from https://pdfs.semanticscholar.org/8f5f/d0ca3e659edf18b21e31c0f144fb69668b3e.pdf
Many studies have demonstrated that some PEX pipes increase biofilm growth [59,140,147] and OP growth [59,140] relative to copper and iron. Unfortunately, it is unclear how general these effects are because the formulation of PEX used (e.g., PEX-b) varies from one manufacturer to another [170,172] and is typically proprietary and thus not cited in the available literature [59,140,147]. An experiment in the Netherlands using small-scale recirculating water heater systems (eight gallon tanks) connected to copper or PEX pipes (19.4 ft) attributed over three times higher Legionella bulk water levels in PEX pipe systems as compared to copper pipe systems although the authors did not determine if the difference was due to copper antimicrobial effects or leached organic carbon growth-promotion [140].
Which boiler OEM recommends compression and where is considered to be on the heating side?
The reason for this is for maintainance purposes, when changing some components it is necessary to disconnect the pipework below the boiler, also in some cases the outlet from the boiler connection is plastic and soldering the final connection will damage it, the reason for minimum lengths of copper connected to the boiler is the plastic pipe cant always hold up in the event of the boiler over heatingI could have sworn my Potterton boiler manual tells the user to use compression fittings only.
On re-reading the manual, it does say this but its for connection only (obviously).
My Bad.
On all of them we do very little soldering work virtually all press fittings.
Many customers really like the idea of no hot work.
I bet they don't like the price of the press fittings.
Andy
Except like most pros we see so many failed pushfit joints, a properly soldered joint will never leak, DIT pushfit and even some so called pros using pushfit have a very high failure rate, have probably heard every excuse from Manus reps about why their fittings failed, always the installer, never admit their products are sub standardFrom a systems perspective, its a no-brainer.
Except like most pros we see so many failed pushfit joints, a properly soldered joint will never leak, DIT pushfit and even some so called pros using pushfit have a very high failure rate, have probably heard every excuse from Manus reps about why their fittings failed, always the installer, never admit their products are sub standard
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