DHW coil

DHW coil

PostBy: JeepinPete On: Thu Oct 25, 2012 9:21 pm

Looks like I need one :( The used one I installed last year leaked right off the bat. I didn't worry about it because there was no way I was going to get enough time to get it hooked up. So I put a couple pipe plugs in it.

Well, fast forward to today. Pulled it out and rigged up a connection to the house water supply. Sure enough, find a crack in the copper which I soldered up. Dried the coil real good with the torch and hooked it back up to the water supply. There are at least a dozen more pin holes that are weeping barely enough to create a drip. I know this story all too well as my copper house piping is doing much the same and is getting replaced with pex.

So what is the going rate for a new coil for a highboy? And has anyone had any success replacing the finned copper with soft copper tubing of roughly the same length?
Stoker Coal Boiler: EFM
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: Highboy

Re: DHW coil

PostBy: Rob R. On: Fri Nov 02, 2012 7:07 am

You will not get get nearly the same performance with plain soft copper compared to the finned design of the original.
Rob R.
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy