I have to share this pro press and steam.

KC_Jones

Kids these days....lol

Charlie from wmass

you know I am older and still good at hijacking a thread.

nicholas bonham-carter

The manufacturers of propress have experience with process steam for their joints-a different situation, I am sure from our on again-off again heating applications.
I just took a hose end cap off a small 1inch ball valve drain on the base of my boiler to blow that end down. The hose gasket had completely disintegrated. I hope the propress gaskets fare better!
Copper might be suitable for just the header in a drop header, if the riser piping isolates the thermal movement from the boiler sections.--NBC

jonny88

Chris we do still wipe a joint in NYC on a new apt or so.We take all old waste lines out etc and go back to stack.We then caulk in our first piece and go to cast iron from there.Seldom we get to wipe but actually on test on Long Island where you had to lead onto brass .Pretty neat and def gives respect to the old timers.

ChrisJ

nicholas bonham-carter said:

The manufacturers of propress have experience with process steam for their joints-a different situation, I am sure from our on again-off again heating applications.
I just took a hose end cap off a small 1inch ball valve drain on the base of my boiler to blow that end down. The hose gasket had completely disintegrated. I hope the propress gaskets fare better!
Copper might be suitable for just the header in a drop header, if the riser piping isolates the thermal movement from the boiler sections.--NBC

How would silicone gaskets hold up?
They should do fine up to 600F or so and last an incredibly long time.

What about Neoprene? Buna?

Garden hose gaskets (washers) are absolute garbage and certainly not made for high temperature.

vr608

I think the standard sealing elements supplied with Megapress are EPDM. Warranty is only for ten years though.

jonny88

Interesting viega rep said lifetime guarantee

vr608

I got the warranty info here:

http://www.viega.us/cps/rde/xbcr/en-us/MegaPress_Warranty_1115.pdf

Industrial warranty is only two years apparently.

NYplumber

Too much focus on the fittings and not enough on the copper. Copper and steam causes the copper to make dielectric corrosion if i recall and cause a top crack. Seen it before.
If im off on theory, disregard this comment.

ChrisJ

NYplumber said:

Too much focus on the fittings and not enough on the copper. Copper and steam causes the copper to make dielectric corrosion if i recall and cause a top crack. Seen it before.

If im off on theory, disregard this comment.

IMO the thermal expansion / contraction is a bigger problem with steam than the galvanic corrosion.

Look at Gerry Gill's mini tube system. Almost the entire thing is piped in copper and no problems.