Dresser Compression coupling vs threading a steel pipe

elfie

have a 1 1/4" steel pipe being used on a hot water heating system



I am planning to install a check vallve along the pipe (unable to remove pipe from above some ceiling tiles so would need to cut out about 6-9 inche of pipe length)



would it be better to use a dresser compression coupling vs. threading two steep pipe ends to facilitate installation of a check valve?



heard dresser couplings are very reliable



thanks

Jim Godbout

Repair

Try progress for steel

It works great for this type of repair

Tim McElwain

I think Jim meant

Propress not progress, sorry Jim if I ma wrong!

Jim Godbout

You are right

Computer always correcting my spelling

Thanks

Jim

elfie

black pipe

does it work on black pipe, and is it better than threading?



why would anyone ever thread a steel pipe with these types of couplings? especially when you can't remove a pipe and bring it into a workshop to get help from a vice

Jim Godbout

propress makes repair very easy

here is link to Propress with iron pipe



we use it on oil-gas, hot water, solar, low pressure steam and compressed air

http://www.viega.net/cps/rde/xbcr/en-us/Viega_MegaPress_Systems.pdf

http://www.viega.net/cps/rde/xbcr/en-us/Viega_ProPress_Systems.pdf

take care

jim

SWEI

ProPress questions

I noticed that the ProPress catalog lists low pressure steam (with the FKM gaskets) but the MegaPress only shows EPDM and HNBR gasket options. I've been eying their stainless stuff for awhile now (rep tells me that thinwall 304 now costs less than copper.)

elfie

steel pipe threading

so does all this mean that steel pipe threading is unnecessary?



why would anyone thread a steel pipe in light of compression couplings?



we hired a plumber that was planning to thread steel pipe and never advised on this alternative.



thanks

Gordo

Threaded Steel Pipe

Threaded steel pipe has been around a LONG time.  A Dresser couping I would regard at best as a temporary repair, esp. on anything that undergoes wide temperature swings.  On hot water systems, I've seen them last awhile.  I've seen 'em leak, too.

I'd never use them on steam.  They always leak then.



In regards to Propress, I've used it.  So far, it's worked out...on hot water.  The copper stuff only, not the steel.  Time will tell.



On steam, I would never use it.  I'll let someone else be the Beta Tester on that one.  I've been burned way too many times on installing the latest gizmo and gotten no backup.



In short, threaded steel works and has at least a century of success behind it.

Jim Godbout

Many choices

We all have options for piping some new some old

We choose to stay on cutting edge following many techniques from European market which tends to explore mechanical engineering well before us in North America and it has worked out very well for us



God luck in your decisions

RJ_4

dressler

I have used these couplings in different applic.  I used them alot to repair and replace steam condensate return lines. you need to check the gaskets that come with the coupling , for steam tou need the high temp gaskets (usually indicated by a green dot on the gasket.)  I would also coat both sides of gaskets with teflon pipe dope, never had any leaks

RJ_4

dressler

I have used these couplings in different applic.  I used them alot to repair and replace steam condensate return lines. you need to check the gaskets that come with the coupling , for steam tou need the high temp gaskets (usually indicated by a green dot on the gasket.)  I would also coat both sides of gaskets with teflon pipe dope, never had any leaks