SuperStor corrosion

Delta

I installed a SS-40 Superstor tank about 3 years ago. I have noticed that the "Boiler Inlet and Outlet" are corroding badly, it appears almost to the point of failure. I used black iron connected to copper. Is it the black iron pipe that shouldnt have been used? Im almost afraid to put a wrench on it, it looks like it will crush. Thanks....

gehring_3

corrosion

I'm not a pro so I'll await other responses too, but I always use a brass fitting in between black iron and copper.

Mark Eatherton1

Which side are we talking about...

the potable side or the boiler side?

ME

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ed wallace

corrosion

you should have used brass nipples not black iron

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Delta

Yeah, thats what I figured, I just hope the pipe doesnt collapse.

Terry Larsell

Black fittings

I have been using black fittings on superstores on the boiler side and haven't noticed corrosion. Iron pumps are similar and everyone seems to use them in closed systems. I thought you could mix Iron and copper if the air was gone.

Terry

ed wallace

corrosion

using black iron depends on the minerails in the local water supply

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Delta

Well, Im gonna put brass on, hopefully that will take care of it, it just seems odd that the whole system is black iron (except for the domestic water supply) and have had no problems. It just seems odd that the piping is corroding so fast, and appears so brittle, I just hope I can get the nipples off. Thanks for your help, I always depend on you guys to come through!!!!

eleft_4

SuperStor nipple corrosion

The female boiler side fittings in the tank are flare, installed at 225 ft lb of torque at the factory.

If they're screwed up, can you do it?

al

Delta

Im hoping to be able to just get the black iron nipples off, and reinstall the brass ones without the black iron crumbling. If they do crumble, Im screwed

hr

Why not just

screw a copper male adapter into the connection. As Al mentioned there is a brass flare connection against the tank already for the the disimilar metal break.

Also these flare adapters are removable so you could put the adapter in a vice and do some sugery on the old corroded nipple. If it's that bad an ice pick should be able to remove it:)

I suspect there was a small leak? You need O2 for corrosion to happen. If the system was tight there should be know reason the black nipple corroded?? It's not uncommon to use steel nipples into that connection.

Might check the ph of the boiler fluid also. Generally minerals in the water protect the ferrous components by putting a film on the surfaces. Of course too many minerals would coat the surfaces of the boiler and drive down HX efficiency.

I've read that a .011" coating can waste 18% in efficiency?

If the corrosion was from the inside I'd look at water quality (ph)issues.

hot rod

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