poly B radiant

Glen

Just got off the phone with my son (another plumber/gas fitter in the family!) He's doing a boiler re&re tomorrow - poly B radiant slab. The common fix in his area (Van. B.C.) is a copper fin boiler, minimal black iron pipe and/or fittings, no heat exchanger. Now - I have had very little success with this fix - any other opinions out there??? I would prefer a boiler with an Orange or Silver jacket, heat exchanger and a good dose of oxygen scavanger - any ideas???

kevin coppinger_4

I'd do the HX...

too pricey the other way. ALL non ferrous components including pumps would be big bucks and hard to get fast down the road. kpc

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leo g_69

glen, just a reminder

the larrs copper boiler have cast headers, the only copper tube boiler that i know of that has brass headers is the raypac. laars will void their warranty if used directly on non-oxyguard. when ever we do these jobs, we try to go with a bronze flat plate heat exchanger, but every now and then, we will use the raypac and copper only, and of course, a brass circ (a little less money for a baseboard system that only needs the one pump).

what company does your son work for? i'm in north van.

leo g.

hr

Actually

the lesser the amount of ferrous components the greater the corrosion attack, to those pieces! It has to do with the ratio of material. You need to get rid of ALL the non ferrous components, to be 100% protected.

Sometimes the seperate HX with non ferrous "stuff" including the expansion tank, pencils out best, if you want to stay with the current boiler..

I'm considering all non ferrous on all my systems from now on. With plenty of reliable stainless boilers out there, the only change will be bronze pumps, and DHW expansion tanks. A small price in the big picture, (if you use zone valves

Now all we need is Grundfos 15-58 in bronze or stainless, Rich!

I've been told O2 barriers do not stop ALL the O2 ingress, assuming of course the barriers are properly applied and intact when all the tube installation is complete

hot rod

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kevin coppinger_4

I guess this ....

would be a vote for George @ Rohmar water conditioning in both cases. In either case water chemistry is inportant...at least I am seeing that more so in my old age. kpc

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Glen

My son works for Lambert after several years with Hillcrest. He is still hopeful that Dad will hire him in the near future. It is my opinion that he needs to wet his oar with other contractors before coming home.

Glen

I think Raypak is the boiler they are installing - removing a super hot which lasted only five years. There are budget limitations for this job - and they may install the hx later. I'm just thinking (out loud) that unless the fix includes all the necessary parts - they may be repeating the work soon.

hr

Glen

I sure add a conditioner if the HX option is out. Properly maintained the inhibitors will provide good protection.

The sulfides are ther O2 scavangers in these products. A test kit is available to watch the levels. And a yearly ph test.

Corrosion can only occur in a closed loop system with the presence of O2. Keep that in check and the poly B systems work fine.

hot rod

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leo g_70

hillcrest

is the place i go for those, "no longer stocked items"! funny thing out here is that vancouver has its' own charter, and just refuses to get in tune with the times and adopt the RHWHA guidlines. i still see a lot of these non-barrier systems there. thiugh they do now look at the boiler room on final plumbing, and "check" to make sure that these systems are no longer used! LOL!!! i wouldn't be surprised if even after the new national building code arrives, with the new section for heating, that vancouver will just ignore that too! how sad that our major city has its" head in the sand on this issue!

leo g