suppliers for buffer tanks

Jim_70

Thanks everyone for your replies on piping a buffer tank.
I am looking for an 80 gallon model with 2 2" NPT boiler tappings and 2 1.5" NPT system tappings.
Does anyone know of a manufacturer of a tank that meets that criteria and doesn't cost a fortune?
Thanks
Jim

Weezbo

Jim you could tap a Hot water tank....

with 3/4" holes and 2 1" element holes,and use 3/4"ips to 1" copper adaptors in the 4 3/4" holes and 2 i"ips to 1& 1/4" male copper adaptors.

then step the function to and from the tank from the boiler by using two zones off the 4 tappings,one zone at the top one zone through the tank from top to bottom,check the 1 1/4" at the lower element ,and run the top tap out to the field,with a modulating bypass on the boiler loop to maintain a partial differential on your system.

i would like to post a picture for you buh i am really bad at sweedish or whatever this lexmark printer scanner copier thing happens to be having the entire sequence of events and directions written in for homeowner satisfaction

you can get alot of flow through that 1 1/4 .

indirects with 2' taps are spendier proposition. and ones with two coils for the most part in the 2" size cost a veritable Fortune.the list price is going into healthy 5 didgit figures.

Jim_70

Bock sells a storage tank that has 3 2" connections and a 3/4 T&P". Also, 2 tappings for anode rods. How would you recommend piping something like that? It's the ST80
www.bockwaterheaters.com

Joe Brix

I think all the comercial

tank sellers: American Water Heater, Rheem, Lochinvar have a 3 port 2" 80 gal glass lined tank. Some even have a 1.5 tapping for the T&P valve.

Jim_70

Rheem has an ST80 storage tank which has 2 2" boiler connections and a 2" hot water connection on the top, as well as a 1" and 3/4" tappings on the top of the tank. Which would be better for the system inflow and outflow? (Tap the 2" for outflow to zones and the 1" and 3/4" for inflow from returns)? Would I just tee the 1.5" return pipe to the 3/4" and 1" tappings in tank?